一、Exception in thread "main" java.lang.RuntimeException: java.net.ConnectException:

<span style="font-size:18px;"><span style="font-size:14px;">Exception in thread "main" java.lang.RuntimeException: java.net.ConnectException: Call From localhost/127.0.0.1 to localhost:9000 failed on connection exception: java.net.ConnectException: Connection refused; For more details see:  http://wiki.apache.org/hadoop/ConnectionRefused
	at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:522)
	at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:677)
	at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:621)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
	at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
Caused by: java.net.ConnectException: Call From localhost/127.0.0.1 to localhost:9000 failed on connection exception: java.net.ConnectException: Connection refused; For more details see:  http://wiki.apache.org/hadoop/ConnectionRefused
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
	at org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java:791)
	at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:731)
	at org.apache.hadoop.ipc.Client.call(Client.java:1472)
	at org.apache.hadoop.ipc.Client.call(Client.java:1399)
	at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:232)
	at com.sun.proxy.$Proxy13.getFileInfo(Unknown Source)
	at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getFileInfo(ClientNamenodeProtocolTranslatorPB.java:752)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:187)
	at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
	at com.sun.proxy.$Proxy14.getFileInfo(Unknown Source)
	at org.apache.hadoop.hdfs.DFSClient.getFileInfo(DFSClient.java:1988)
	at org.apache.hadoop.hdfs.DistributedFileSystem$18.doCall(DistributedFileSystem.java:1118)
	at org.apache.hadoop.hdfs.DistributedFileSystem$18.doCall(DistributedFileSystem.java:1114)
	at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
	at org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:1114)
	at org.apache.hadoop.fs.FileSystem.exists(FileSystem.java:1400)
	at org.apache.hadoop.hive.ql.session.SessionState.createRootHDFSDir(SessionState.java:596)
	at org.apache.hadoop.hive.ql.session.SessionState.createSessionDirs(SessionState.java:554)
	at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:508)
	... 8 more
Caused by: java.net.ConnectException: Connection refused
	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
	at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)
	at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:530)
	at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:494)
	at org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:607)
	at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:705)
	at org.apache.hadoop.ipc.Client$Connection.access$2800(Client.java:368)
	at org.apache.hadoop.ipc.Client.getConnection(Client.java:1521)
	at org.apache.hadoop.ipc.Client.call(Client.java:1438)
	... 28 more
</span></span>
 

解決辦法：

開啟Hadoop

二、Exception in thread "main" java.lang.RuntimeException: java.lang.

<span style="font-size:18px;"><span style="font-size:14px;">Exception in thread "main" java.lang.RuntimeException: java.lang.IllegalArgumentException: java.net.URISyntaxException: Relative path in absolute URI: ${system:java.io.tmpdir%7D/$%7Bsystem:user.name%7D
	at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:522)
	at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:677)
	at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:621)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
	at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
Caused by: java.lang.IllegalArgumentException: java.net.URISyntaxException: Relative path in absolute URI: ${system:java.io.tmpdir%7D/$%7Bsystem:user.name%7D
	at org.apache.hadoop.fs.Path.initialize(Path.java:206)
	at org.apache.hadoop.fs.Path.<init>(Path.java:172)
	at org.apache.hadoop.hive.ql.session.SessionState.createSessionDirs(SessionState.java:563)
	at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:508)
	... 8 more
Caused by: java.net.URISyntaxException: Relative path in absolute URI: ${system:java.io.tmpdir%7D/$%7Bsystem:user.name%7D
	at java.net.URI.checkPath(URI.java:1823)
	at java.net.URI.<init>(URI.java:745)
	at org.apache.hadoop.fs.Path.initialize(Path.java:203)
	... 11 more
</span></span>
 

1、修改/hive/conf/hive-site.xml,中含有"system:java.io.tmpdir"的配置項（共四處）

2、在/hive/目錄下新建iotmp資料夾

3、將含有"system:java.io.tmpdir"的配置項的值修改為iotmp地址，修改後如下：

<span style="font-size:18px;">  <property>
    <name>hive.exec.local.scratchdir</name>
    <value>/home/sky/hive/iotmp</value>
    <description>Local scratch space for Hive jobs</description>
  </property></span>
 

<span style="font-size:18px;">  <property>
    <name>hive.downloaded.resources.dir</name>
    <value>/home/sky/hive/iotmp</value>
    <description>Temporary local directory for added resources in the remote file system.</description>
  </property></span>

<span style="font-size:18px;">  <property>
    <name>hive.querylog.location</name>
    <value>/home/sky/hive/iotmp</value>
    <description>Location of Hive run time structured log file</description>
  </property></span>

<span style="font-size:18px;">  <property>
    <name>hive.server2.logging.operation.log.location</name>
    <value>/home/sky/hive/iotmp</value>
    <description>Top level directory where operation logs are stored if logging functionality is enabled</description>
  </property></span>

<span style="font-size:18px;">[ERROR] Terminal initialization failed; falling back to unsupported
java.lang.IncompatibleClassChangeError: Found class jline.Terminal, but interface was expected
	at jline.TerminalFactory.create(TerminalFactory.java:101)
	at jline.TerminalFactory.get(TerminalFactory.java:158)
	at jline.console.ConsoleReader.<init>(ConsoleReader.java:229)
	at jline.console.ConsoleReader.<init>(ConsoleReader.java:221)
	at jline.console.ConsoleReader.<init>(ConsoleReader.java:209)
	at org.apache.hadoop.hive.cli.CliDriver.setupConsoleReader(CliDriver.java:787)
	at org.apache.hadoop.hive.cli.CliDriver.executeDriver(CliDriver.java:721)
	at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:681)
	at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:621)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
	at org.apache.hadoop.util.RunJar.main(RunJar.java:136)

Exception in thread "main" java.lang.IncompatibleClassChangeError: Found class jline.Terminal, but interface was expected
	at jline.console.ConsoleReader.<init>(ConsoleReader.java:230)
	at jline.console.ConsoleReader.<init>(ConsoleReader.java:221)
	at jline.console.ConsoleReader.<init>(ConsoleReader.java:209)
	at org.apache.hadoop.hive.cli.CliDriver.setupConsoleReader(CliDriver.java:787)
	at org.apache.hadoop.hive.cli.CliDriver.executeDriver(CliDriver.java:721)
	at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:681)
	at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:621)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
	at org.apache.hadoop.util.RunJar.main(RunJar.java:136)</span>

問題原因：jline***.jar檔案版本過低。

1、把/hive/bin/目錄下的jline2.12.jar，複製到/hadoop/share/hadoop/yarn/lib/目錄下；

2、刪除/hadoop/share/hadoop/yarn/lib/目錄下的jline***.jar檔案

3、修改jline2.12.jar許可權為775。 chmod 775  jline2.12.jar

四、配置檔案的修改

1、首先執行 cp hive-env.sh.template hive-env.sh

  cp hive-default.xml.template hive-site.xml

cp hive-log4j.properties.template hive-log4j.properties

2、vim hive-env.sh

 export HADOOP_HOME=/home/sky/hadoop

3、vim hive-site.xml

<span style="font-size:18px;"><?xml version="1.0" encoding="UTF-8" standalone="no"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?><!--
   Licensed to the Apache Software Foundation (ASF) under one or more
   contributor license agreements.  See the NOTICE file distributed with
   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You under the Apache License, Version 2.0
   (the "License"); you may not use this file except in compliance with
   the License.  You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
--><configuration>
  <!-- WARNING!!! This file is auto generated for documentation purposes ONLY! -->
  <!-- WARNING!!! Any changes you make to this file will be ignored by Hive.   -->
  <!-- WARNING!!! You must make your changes in hive-site.xml instead.         -->
  <!-- Hive Execution Parameters -->
  <property>
    <name>hive.exec.script.wrapper</name>
    <value/>
    <description/>
  </property>
  <property>
    <name>hive.exec.plan</name>
    <value/>
    <description/>
  </property>
  <property>
    <name>hive.plan.serialization.format</name>
    <value>kryo</value>
    <description>
      Query plan format serialization between client and task nodes. 
      Two supported values are : kryo and javaXML. Kryo is default.
    </description>
  </property>
  <property>
    <name>hive.exec.stagingdir</name>
    <value>.hive-staging</value>
    <description>Directory name that will be created inside table locations in order to support HDFS encryption. This is replaces ${hive.exec.scratchdir} for query results with the exception of read-only tables. In all cases ${hive.exec.scratchdir} is still used for other temporary files, such as job plans.</description>
  </property>
  <property>
    <name>hive.exec.scratchdir</name>
    <value>/tmp/hive</value>
    <description>HDFS root scratch dir for Hive jobs which gets created with write all (733) permission. For each connecting user, an HDFS scratch dir: ${hive.exec.scratchdir}/<username> is created, with ${hive.scratch.dir.permission}.</description>
  </property>
  <property>
    <name>hive.exec.local.scratchdir</name>
    <value>/home/sky/hive/iotmp</value>
    <description>Local scratch space for Hive jobs</description>
  </property>
  <property>
    <name>hive.downloaded.resources.dir</name>
    <value>/home/sky/hive/iotmp</value>
    <description>Temporary local directory for added resources in the remote file system.</description>
  </property>
  <property>
    <name>hive.scratch.dir.permission</name>
    <value>700</value>
    <description>The permission for the user specific scratch directories that get created.</description>
  </property>
  <property>
    <name>hive.exec.submitviachild</name>
    <value>false</value>
    <description/>
  </property>
  <property>
    <name>hive.exec.submit.local.task.via.child</name>
    <value>true</value>
    <description>
      Determines whether local tasks (typically mapjoin hashtable generation phase) runs in 
      separate JVM (true recommended) or not. 
      Avoids the overhead of spawning new JVM, but can lead to out-of-memory issues.
    </description>
  </property>
  <property>
    <name>hive.exec.script.maxerrsize</name>
    <value>100000</value>
    <description>
      Maximum number of bytes a script is allowed to emit to standard error (per map-reduce task). 
      This prevents runaway scripts from filling logs partitions to capacity
    </description>
  </property>
  <property>
    <name>hive.exec.script.allow.partial.consumption</name>
    <value>false</value>
    <description>
      When enabled, this option allows a user script to exit successfully without consuming 
      all the data from the standard input.
    </description>
  </property>
  <property>
    <name>stream.stderr.reporter.prefix</name>
    <value>reporter:</value>
    <description>Streaming jobs that log to standard error with this prefix can log counter or status information.</description>
  </property>
  <property>
    <name>stream.stderr.reporter.enabled</name>
    <value>true</value>
    <description>Enable consumption of status and counter messages for streaming jobs.</description>
  </property>
  <property>
    <name>hive.exec.compress.output</name>
    <value>false</value>
    <description>
      This controls whether the final outputs of a query (to a local/HDFS file or a Hive table) is compressed. 
      The compression codec and other options are determined from Hadoop config variables mapred.output.compress*
    </description>
  </property>
  <property>
    <name>hive.exec.compress.intermediate</name>
    <value>false</value>
    <description>
      This controls whether intermediate files produced by Hive between multiple map-reduce jobs are compressed. 
      The compression codec and other options are determined from Hadoop config variables mapred.output.compress*
    </description>
  </property>
  <property>
    <name>hive.intermediate.compression.codec</name>
    <value/>
    <description/>
  </property>
  <property>
    <name>hive.intermediate.compression.type</name>
    <value/>
    <description/>
  </property>
  <property>
    <name>hive.exec.reducers.bytes.per.reducer</name>
    <value>256000000</value>
    <description>size per reducer.The default is 256Mb, i.e if the input size is 1G, it will use 4 reducers.</description>
  </property>
  <property>
    <name>hive.exec.reducers.max</name>
    <value>1009</value>
    <description>
      max number of reducers will be used. If the one specified in the configuration parameter mapred.reduce.tasks is
      negative, Hive will use this one as the max number of reducers when automatically determine number of reducers.
    </description>
  </property>
  <property>
    <name>hive.exec.pre.hooks</name>
    <value/>
    <description>
      Comma-separated list of pre-execution hooks to be invoked for each statement. 
      A pre-execution hook is specified as the name of a Java class which implements the 
      org.apache.hadoop.hive.ql.hooks.ExecuteWithHookContext interface.
    </description>
  </property>
  <property>
    <name>hive.exec.post.hooks</name>
    <value/>
    <description>
      Comma-separated list of post-execution hooks to be invoked for each statement. 
      A post-execution hook is specified as the name of a Java class which implements the 
      org.apache.hadoop.hive.ql.hooks.ExecuteWithHookContext interface.
    </description>
  </property>
  <property>
    <name>hive.exec.failure.hooks</name>
    <value/>
    <description>
      Comma-separated list of on-failure hooks to be invoked for each statement. 
      An on-failure hook is specified as the name of Java class which implements the 
      org.apache.hadoop.hive.ql.hooks.ExecuteWithHookContext interface.
    </description>
  </property>
  <property>
    <name>hive.exec.query.redactor.hooks</name>
    <value/>
    <description>
      Comma-separated list of hooks to be invoked for each query which can 
      tranform the query before it's placed in the job.xml file. Must be a Java class which 
      extends from the org.apache.hadoop.hive.ql.hooks.Redactor abstract class.
    </description>
  </property>
  <property>
    <name>hive.client.stats.publishers</name>
    <value/>
    <description>
      Comma-separated list of statistics publishers to be invoked on counters on each job. 
      A client stats publisher is specified as the name of a Java class which implements the 
      org.apache.hadoop.hive.ql.stats.ClientStatsPublisher interface.
    </description>
  </property>
  <property>
    <name>hive.exec.parallel</name>
    <value>false</value>
    <description>Whether to execute jobs in parallel</description>
  </property>
  <property>
    <name>hive.exec.parallel.thread.number</name>
    <value>8</value>
    <description>How many jobs at most can be executed in parallel</description>
  </property>
  <property>
    <name>hive.mapred.reduce.tasks.speculative.execution</name>
    <value>true</value>
    <description>Whether speculative execution for reducers should be turned on. </description>
  </property>
  <property>
    <name>hive.exec.counters.pull.interval</name>
    <value>1000</value>
    <description>
      The interval with which to poll the JobTracker for the counters the running job. 
      The smaller it is the more load there will be on the jobtracker, the higher it is the less granular the caught will be.
    </description>
  </property>
  <property>
    <name>hive.exec.dynamic.partition</name>
    <value>true</value>
    <description>Whether or not to allow dynamic partitions in DML/DDL.</description>
  </property>
  <property>
    <name>hive.exec.dynamic.partition.mode</name>
    <value>strict</value>
    <description>
      In strict mode, the user must specify at least one static partition
      in case the user accidentally overwrites all partitions.
      In nonstrict mode all partitions are allowed to be dynamic.
    </description>
  </property>
  <property>
    <name>hive.exec.max.dynamic.partitions</name>
    <value>1000</value>
    <description>Maximum number of dynamic partitions allowed to be created in total.</description>
  </property>
  <property>
    <name>hive.exec.max.dynamic.partitions.pernode</name>
    <value>100</value>
    <description>Maximum number of dynamic partitions allowed to be created in each mapper/reducer node.</description>
  </property>
  <property>
    <name>hive.exec.max.created.files</name>
    <value>100000</value>
    <description>Maximum number of HDFS files created by all mappers/reducers in a MapReduce job.</description>
  </property>
  <property>
    <name>hive.exec.default.partition.name</name>
    <value>__HIVE_DEFAULT_PARTITION__</value>
    <description>
      The default partition name in case the dynamic partition column value is null/empty string or any other values that cannot be escaped. 
      This value must not contain any special character used in HDFS URI (e.g., ':', '%', '/' etc). 
      The user has to be aware that the dynamic partition value should not contain this value to avoid confusions.
    </description>
  </property>
  <property>
    <name>hive.lockmgr.zookeeper.default.partition.name</name>
    <value>__HIVE_DEFAULT_ZOOKEEPER_PARTITION__</value>
    <description/>
  </property>
  <property>
    <name>hive.exec.show.job.failure.debug.info</name>
    <value>true</value>
    <description>
      If a job fails, whether to provide a link in the CLI to the task with the
      most failures, along with debugging hints if applicable.
    </description>
  </property>
  <property>
    <name>hive.exec.job.debug.capture.stacktraces</name>
    <value>true</value>
    <description>
      Whether or not stack traces parsed from the task logs of a sampled failed task 
      for each failed job should be stored in the SessionState
    </description>
  </property>
  <property>
    <name>hive.exec.job.debug.timeout</name>
    <value>30000</value>
    <description/>
  </property>
  <property>
    <name>hive.exec.tasklog.debug.timeout</name>
    <value>20000</value>
    <description/>
  </property>
  <property>
    <name>hive.output.file.extension</name>
    <value/>
    <description>
      String used as a file extension for output files. 
      If not set, defaults to the codec extension for text files (e.g. ".gz"), or no extension otherwise.
    </description>
  </property>
  <property>
    <name>hive.exec.mode.local.auto</name>
    <value>false</value>
    <description>Let Hive determine whether to run in local mode automatically</description>
  </property>
  <property>
    <name>hive.exec.mode.local.auto.inputbytes.max</name>
    <value>134217728</value>
    <description>When hive.exec.mode.local.auto is true, input bytes should less than this for local mode.</description>
  </property>
  <property>
    <name>hive.exec.mode.local.auto.input.files.max</name>
    <value>4</value>
    <description>When hive.exec.mode.local.auto is true, the number of tasks should less than this for local mode.</description>
  </property>
  <property>
    <name>hive.exec.drop.ignorenonexistent</name>
    <value>true</value>
    <description>Do not report an error if DROP TABLE/VIEW/Index/Function specifies a non-existent table/view/index/function</description>
  </property>
  <property>
    <name>hive.ignore.mapjoin.hint</name>
    <value>true</value>
    <description>Ignore the mapjoin hint</description>
  </property>
  <property>
    <name>hive.file.max.footer</name>
    <value>100</value>
    <description>maximum number of lines for footer user can define for a table file</description>
  </property>
  <property>
    <name>hive.resultset.use.unique.column.names</name>
    <value>true</value>
    <description>
      Make column names unique in the result set by qualifying column names with table alias if needed.
      Table alias will be added to column names for queries of type "select *" or 
      if query explicitly uses table alias "select r1.x..".
    </description>
  </property>
  <property>
    <name>fs.har.impl</name>
    <value>org.apache.hadoop.hive.shims.HiveHarFileSystem</value>
    <description>The implementation for accessing Hadoop Archives. Note that this won't be applicable to Hadoop versions less than 0.20</description>
  </property>
  <property>
    <name>hive.metastore.warehouse.dir</name>
    <value>/user/hive/warehouse</value>
    <description>location of default database for the warehouse</description>
  </property>
  <property>
    <name>hive.metastore.uris</name>
    <value/>
    <description>Thrift URI for the remote metastore. Used by metastore client to connect to remote metastore.</description>
  </property>
  <property>
    <name>hive.metastore.connect.retries</name>
    <value>3</value>
    <description>Number of retries while opening a connection to metastore</description>
  </property>
  <property>
    <name>hive.metastore.failure.retries</name>
    <value>1</value>
    <description>Number of retries upon failure of Thrift metastore calls</description>
  </property>
  <property>
    <name>hive.metastore.client.connect.retry.delay</name>
    <value>1s</value>
    <description>
      Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
      Number of seconds for the client to wait between consecutive connection attempts
    </description>
  </property>
  <property>
    <name>hive.metastore.client.socket.timeout</name>
    <value>600s</value>
    <description>
      Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
      MetaStore Client socket timeout in seconds
    </description>
  </property>
  <property>
    <name>hive.metastore.client.socket.lifetime</name>
    <value>0s</value>
    <description>
      Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
      MetaStore Client socket lifetime in seconds. After this time is exceeded, client
      reconnects on the next MetaStore operation. A value of 0s means the connection
      has an infinite lifetime.
    </description>
  </property>
  <property>
    <name>javax.jdo.option.ConnectionPassword</name>
    <value>hive</value>
    <description>password to use against metastore database</description>
  </property>
  <property>
    <name>hive.metastore.local</name>
    <value>true</value>
    <description></description>
  </property>
  <property>
    <name>hive.metastore.ds.connection.url.hook</name>
    <value/>
    <description>Name of the hook to use for retrieving the JDO connection URL. If empty, the value in javax.jdo.option.ConnectionURL is used</description>
  </property>
  <property>
    <name>javax.jdo.option.Multithreaded</name>
    <value>true</value>
    <description>Set this to true if multiple threads access metastore through JDO concurrently.</description>
  </property>
  <property>
    <name>javax.jdo.option.ConnectionURL</name>
    <value>jdbc:mysql://localhost:3306/hive?createDatabaseIfNotExist=true</value>
    <description>JDBC connect string for a JDBC metastore</description>
  </property>
  <property>
    <name>hive.hmshandler.retry.attempts</name>
    <value>10</value>
    <description>The number of times to retry a HMSHandler call if there were a connection error.</description>
  </property>
  <property>
    <name>hive.hmshandler.retry.interval</name>
    <value>2000ms</value>
    <description>
      Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is msec if not specified.
      The time between HMSHandler retry attempts on failure.
    </description>
  </property>
  <property>
    <name>hive.hmshandler.force.reload.conf</name>
    <value>false</value>
    <description>
      Whether to force reloading of the HMSHandler configuration (including
      the connection URL, before the next metastore query that accesses the
      datastore. Once reloaded, this value is reset to false. Used for
      testing only.
    </description>
  </property>
  <property>
    <name>hive.metastore.server.max.message.size</name>
    <value>104857600</value>
    <description>Maximum message size in bytes a HMS will accept.</description>
  </property>
  <property>
    <name>hive.metastore.server.min.threads</name>
    <value>200</value>
    <description>Minimum number of worker threads in the Thrift server's pool.</description>
  </property>
  <property>
    <name>hive.metastore.server.max.threads</name>
    <value>1000</value>
    <description>Maximum number of worker threads in the Thrift server's pool.</description>
  </property>
  <property>
    <name>hive.metastore.server.tcp.keepalive</name>
    <value>true</value>
    <description>Whether to enable TCP keepalive for the metastore server. Keepalive will prevent accumulation of half-open connections.</description>
  </property>
  <property>
    <name>hive.metastore.archive.intermediate.original</name>
    <value>_INTERMEDIATE_ORIGINAL</value>
    <description>
      Intermediate dir suffixes used for archiving. Not important what they
      are, as long as collisions are avoided
    </description>
  </property>
  <property>
    <name>hive.metastore.archive.intermediate.archived</name>
    <value>_INTERMEDIATE_ARCHIVED</value>
    <description/>
  </property>
  <property>
    <name>hive.metastore.archive.intermediate.extracted</name>
    <value>_INTERMEDIATE_EXTRACTED</value>
    <description/>
  </property>
  <property>
    <name>hive.metastore.kerberos.keytab.file</name>
    <value/>
    <description>The path to the Kerberos Keytab file containing the metastore Thrift server's service principal.</description>
  </property>
  <property>
    <name>hive.metastore.kerberos.principal</name>
    <value>hive-metastore/[email protected]</value>
    <description>
      The service principal for the metastore Thrift server. 
      The special string _HOST will be replaced automatically with the correct host name.
    </description>
  </property>
  <property>
    <name>hive.metastore.sasl.enabled</name>
    <value>false</value>
    <description>If true, the metastore Thrift interface will be secured with SASL. Clients must authenticate with Kerberos.</description>
  </property>
  <property>
    <name>hive.metastore.thrift.framed.transport.enabled</name>
    <value>false</value>
    <description>If true, the metastore Thrift interface will use TFramedTransport. When false (default) a standard TTransport is used.</description>
  </property>
  <property>
    <name>hive.metastore.thrift.compact.protocol.enabled</name>
    <value>false</value>
    <description>
      If true, the metastore Thrift interface will use TCompactProtocol. When false (default) TBinaryProtocol will be used.
      Setting it to true will break compatibility with older clients running TBinaryProtocol.
    </description>
  </property>
  <property>
    <name>hive.cluster.delegation.token.store.class</name>
    <value>org.apache.hadoop.hive.thrift.MemoryTokenStore</value>
    <description>The delegation token store implementation. Set to org.apache.hadoop.hive.thrift.ZooKeeperTokenStore for load-balanced cluster.</description>
  </property>
  <property>
    <name>hive.cluster.delegation.token.store.zookeeper.connectString</name>
    <value/>
    <description>
      The ZooKeeper token store connect string. You can re-use the configuration value
      set in hive.zookeeper.quorum, by leaving this parameter unset.
    </description>
  </property>
  <property>
    <name>hive.cluster.delegation.token.store.zookeeper.znode</name>
    <value>/hivedelegation</value>
    <description>
      The root path for token store data. Note that this is used by both HiveServer2 and
      MetaStore to store delegation Token. One directory gets created for each of them.
      The final directory names would have the servername appended to it (HIVESERVER2,
      METASTORE).
    </description>
  </property>
  <property>
    <name>hive.cluster.delegation.token.store.zookeeper.acl</name>
    <value/>
    <description>
      ACL for token store entries. Comma separated list of ACL entries. For example:
      sasl:hive/[email protected]:cdrwa,sasl:hive/[email protected]:cdrwa
      Defaults to all permissions for the hiveserver2/metastore process user.
    </description>
  </property>
  <property>
    <name>hive.metastore.cache.pinobjtypes</name>
    <value>Table,StorageDescriptor,SerDeInfo,Partition,Database,Type,FieldSchema,Order</value>
    <description>List of comma separated metastore object types that should be pinned in the cache</description>
  </property>
  <property>
    <name>datanucleus.connectionPoolingType</name>
    <value>BONECP</value>
    <description>Specify connection pool library for datanucleus</description>
  </property>
  <property>
    <name>datanucleus.validateTables</name>
    <value>false</value>
    <description>validates existing schema against code. turn this on if you want to verify existing schema</description>
  </property>
  <property>
    <name>datanucleus.validateColumns</name>
    <value>false</value>
    <description>validates existing schema against code. turn this on if you want to verify existing schema</description>
  </property>
  <property>
    <name>datanucleus.validateConstraints</name>
    <value>false</value>
    <description>validates existing schema against code. turn this on if you want to verify existing schema</description>
  </property>
  <property>
    <name>datanucleus.storeManagerType</name>
    <value>rdbms</value>
    <description>metadata store type</description>
  </property>
  <property>
    <name>datanucleus.autoCreateSchema</name>
    <value>true</value>
    <description>creates necessary schema on a startup if one doesn't exist. set this to false, after creating it once</description>
  </property>
  <property>
    <name>datanucleus.fixedDatastore</name>
    <value>false</value>
    <description/>
  </property>
  <property>
    <name>hive.metastore.schema.verification</name>
    <value>false</value>
    <description>
      Enforce metastore schema version consistency.
      True: Verify that version information stored in metastore matches with one from Hive jars.  Also disable automatic
            schema migration attempt. Users are required to manually migrate schema after Hive upgrade which ensures
            proper metastore schema migration. (Default)
      False: Warn if the version information stored in metastore doesn't match with one from in Hive jars.
    </description>
  </property>
  <property>
    <name>hive.metastore.schema.verification.record.version</name>
    <value>true</value>
    <description>
      When true the current MS version is recorded in the VERSION table. If this is disabled and verification is
       enabled the MS will be unusable.
    </description>
  </property>
  <property>
    <name>datanucleus.autoStartMechanismMode</name>
    <value>checked</value>
    <description>throw exception if metadata tables are incorrect</description>
  </property>
  <property>
    <name>datanucleus.transactionIsolation</name>
    <value>read-committed</value>
    <description>Default transaction isolation level for identity generation.</description>
  </property>
  <property>
    <name>datanucleus.cache.level2</name>
    <value>false</value>
    <description>Use a level 2 cache. Turn this off if metadata is changed independently of Hive metastore server</description>
  </property>
  <property>
    <name>datanucleus.cache.level2.type</name>
    <value>none</value>
    <description/>
  </property>
  <property>
    <name>datanucleus.identifierFactory</name>
    <value>datanucleus1</value>
    <description>
      Name of the identifier factory to use when generating table/column names etc. 
      'datanucleus1' is used for backward compatibility with DataNucleus v1
    </description>
  </property>
  <property>
    <name>datanucleus.rdbms.useLegacyNativeValueStrategy</name>
    <value>true</value>
    <description/>
  </property>
  <property>
    <name>datanucleus.plugin.pluginRegistryBundleCheck</name>
    <value>LOG</value>
    <description>Defines what happens when plugin bundles are found and are duplicated [EXCEPTION|LOG|NONE]</description>
  </property>
  <property>
    <name>hive.metastore.batch.retrieve.max</name>
    <value>300</value>
    <description>
      Maximum number of objects (tables/partitions) can be retrieved from metastore in one batch. 
      The higher the number, the less the number of round trips is needed to the Hive metastore server, 
      but it may also cause higher memory requirement at the client side.
    </description>
  </property>
  <property>
    <name>hive.metastore.batch.retrieve.table.partition.max</name>
    <value>1000</value>
    <description>Maximum number of table partitions that metastore internally retrieves in one batch.</description>
  </property>
  <property>
    <name>hive.metastore.init.hooks</name>
    <value/>
    <description>
      A comma separated list of hooks to be invoked at the beginning of HMSHandler initialization. 
      An init hook is specified as the name of Java class which extends org.apache.hadoop.hive.metastore.MetaStoreInitListener.
    </description>
  </property>
  <property>
    <name>hive.metastore.pre.event.listeners</name>
    <value/>
    <description>List of comma separated listeners for metastore events.</description>
  </property>
  <property>
    <name>hive.metastore.event.listeners</name>
    <value/>
    <description/>
  </property>
  <property>
    <name>hive.metastore.event.db.listener.timetolive</name>
    <value>86400s</value>
    <description>
      Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
      time after which events will be removed from the database listener queue
    </description>
  </property>
  <property>
    <name>hive.metastore.authorization.storage.checks</name>
    <value>false</value>
    <description>
      Should the metastore do authorization checks against the underlying storage (usually hdfs) 
      for operations like drop-partition (disallow the drop-partition if the user in
      question doesn't have permissions to delete the corresponding directory
      on the storage).
    </description>
  </property>
  <property>
    <name>hive.metastore.event.clean.freq</name>
    <value>0s</value>
    <description>
      Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
      Frequency at which timer task runs to purge expired events in metastore.
    </description>
  </property>
  <property>
    <name>hive.metastore.event.expiry.duration</name>
    <value>0s</value>
    <description>
      Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
      Duration after which events expire from events table
    </description>
  </property>
  <property>
    <name>hive.metastore.execute.setugi</name>
    <value>true</value>
    <description>
      In unsecure mode, setting this property to true will cause the metastore to execute DFS operations using 
      the client's reported user and group permissions. Note that this property must be set on 
      both the client and server sides. Further note that its best effort. 
      If client sets its to true and server sets it to false, client setting will be ignored.
    </description>
  </property>
  <property>
    <name>hive.metastore.partition.name.whitelist.pattern</name>
    <value/>
    <description>Partition names will be checked against this regex pattern and rejected if not matched.</description>
  </property>
  <property>
    <name>hive.metastore.integral.jdo.pushdown</name>
    <value>false</value>
    <description>
      Allow JDO query pushdown for integral partition columns in metastore. Off by default. This
      improves metastore perf for integral columns, especially if there's a large number of partitions.
      However, it doesn't work correctly with integral values that are not normalized (e.g. have
      leading zeroes, like 0012). If metastore direct SQL is enabled and works, this optimization
      is also irrelevant.
    </description>
  </property>
  <property>
    <name>hive.metastore.try.direct.sql</name>
    <value>true</value>
    <description>
      Whether the Hive metastore should try to use direct SQL queries instead of the
      DataNucleus for certain read paths. This can improve metastore performance when
      fetching many partitions or column statistics by orders of magnitude; however, it
      is not guaranteed to work on all RDBMS-es and all versions. In case of SQL failures,
      the metastore will fall back to the DataNucleus, so it's safe even if SQL doesn't
      work for all queries on your datastore. If all SQL queries fail (for example, your
      metastore is backed by MongoDB), you might want to disable this to save the
      try-and-fall-back cost.
    </description>
  </property>
  <property>
    <name>hive.metastore.direct.sql.batch.size</name>
    <value>0</value>
    <description>
      Batch size for partition and other object retrieval from the underlying DB in direct
      SQL. For some DBs like Oracle and MSSQL, there are hardcoded or perf-based limitations
      that necessitate this. For DBs that can handle the queries, this isn't necessary and
      may impede performance. -1 means no batching, 0 means automatic batching.
    </description>
  </property>
  <property>
    <name>hive.metastore.try.direct.sql.ddl</name>
    <value>true</value>
    <description>
      Same as hive.metastore.try.direct.sql, for read statements within a transaction that
      modifies metastore data. Due to non-standard behavior in Postgres, if a direct SQL
      select query has incorrect syntax or something similar inside a transaction, the
      entire transaction will fail and fall-back to DataNucleus will not be possible. You
      should disable the usage of direct SQL inside transactions if that happens in your case.
    </description>
  </property>
  <property>
    <name>hive.metastore.orm.retrieveMapNullsAsEmptyStrings</name>
    <value>false</value>
    <description>Thrift does not support nulls in maps, so any nulls present in maps retrieved from ORM must either be pruned or converted to empty strings. Some backing dbs such as Oracle persist empty strings as nulls, so we should set this parameter if we wish to reverse that behaviour. For others, pruning is the correct behaviour</description>
  </property>
  <property>
    <name>hive.metastore.disallow.incompatible.col.type.changes</name>
    <value>false</value>
    <description>
      If true (default is false), ALTER TABLE operations which change the type of a
      column (say STRING) to an incompatible type (say MAP) are disallowed.
      RCFile default SerDe (ColumnarSerDe) serializes the values in such a way that the
      datatypes can be converted from string to any type. The map is also serialized as
      a string, which can be read as a string as well. However, with any binary
      serialization, this is not true. Blocking the ALTER TABLE prevents ClassCastExceptions
      when subsequently trying to access old partitions.
      
      Primitive types like INT, STRING, BIGINT, etc., are compatible with each other and are
      not blocked.
      
      See HIVE-4409 for more details.
    </description>
  </property>
  <property>
    <name>hive.table.parameters.default</name>
    <value/>
    <description>Default property values for newly created tables</description>
  </property>
  <property>
    <name>hive.ddl.createtablelike.properties.whitelist</name>
    <value/>
    <description>Table Properties to copy over when executing a Create Table Like.</description>
  </property>
  <property>
    <name>hive.metastore.rawstore.impl</name>
    <value>org.apache.hadoop.hive.metastore.ObjectStore</value>
    <description>
      Name of the class that implements org.apache.hadoop.hive.metastore.rawstore interface. 
      This class is used to store and retrieval of raw metadata objects such as table, database
    </description>
  </property>
  <property>
    <name>javax.jdo.option.ConnectionDriverName</name>
    <value>com.mysql.jdbc.Driver</value>
    <description>Driver class name for a JDBC metastore</description>
  </property>
  <property>
    <name>javax.jdo.PersistenceManagerFactoryClass</name>
    <value>org.datanucleus.api.jdo.JDOPersistenceManagerFactory</value>
    <description>class implementing the jdo persistence</description>
  </property>
  <property>
    <name>hive.metastore.expression.proxy</name>
    <value>org.apache.hadoop.hive.ql.optimizer.ppr.PartitionExpressionForMetastore</value>
    <description/>
  </property>
  <property>
    <name>javax.jdo.option.DetachAllOnCommit</name>
    <value>true</value>
    <description>Detaches all objects from session so that they can be used after transaction is committed</description>
  </property>
  <property>
    <name>javax.jdo.option.NonTransactionalRead</name>
    <value>true</value>
    <description>Reads outside of transactions</description>
  </property>
  <property>
    <name>javax.jdo.option.ConnectionUserName</name>
    <value>hive</value>
    <description>Username to use against metastore database</description>
  </property>
  <property>
    <name>hive.metastore.end.function.listeners</name>
    <value/>
    <description>List of comma separated listeners for the end of metastore functions.</description>
  </property>
  <property>
    <name>hive.metastore.partition.inherit.table.properties</name>
    <value/>
    <description>
      List of comma separated keys occurring in table properties which will get inherited to newly created partitions. 
      * implies all the keys will get inherited.
    </description>
  </property>
  <property>
    <name>hive.metastore.filter.hook</name>
    <value>org.apache.hadoop.hive.metastore.DefaultMetaStoreFilterHookImpl</value>
    <description>Metastore hook class for filtering the metadata read results. If hive.security.authorization.manageris set to instance of HiveAuthorizerFactory, then this value is ignored.</description>
  </property>
  <property>
    <name>hive.metastore.dml.events</name>
    <value>false</value>
    <description>If true, the metastore will be asked to fire events for DML operations</description>
  </property>
  <property>
    <name>hive.metastore.client.drop.partitions.using.expressions</name>
    <value>true</value>
    <description>Choose whether dropping partitions with HCatClient pushes the partition-predicate to the metastore, or drops partitions iteratively</description>
  </property>
  <property>
    <name>hive.metastore.aggregate.stats.cache.enabled</name>
    <value>true</value>
    <description>Whether aggregate stats caching is enabled or not.</description>
  </property>
  <property>
    <name>hive.metastore.aggregate.stats.cache.size</name>
    <value>10000</value>
    <description>Maximum number of aggregate stats nodes that we will place in the metastore aggregate stats cache.</description>
  </property>
  <property>
    <name>hive.metastore.aggregate.stats.cache.max.partitions</name>
    <value>10000</value>
    <description>Maximum number of partitions that are aggregated per cache node.</description>
  </property>
  <property>
    <name>hive.metastore.aggregate.stats.cache.fpp</name>
    <value>0.01</value>
    <description>Maximum false positive probability for the Bloom Filter used in each aggregate stats cache node (default 1%).</description>
  </property>
  <property>
    <name>hive.metastore.aggregate.stats.cache.max.variance</name>
    <value>0.01</value>
    <description>Maximum tolerable variance in number of partitions between a cached node and our request (default 1%).</description>
  </property>
  <property>
    <name>hive.metastore.aggregate.stats.cache.ttl</name>
    <value>600s</value>
    <description>
      Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
      Number of seconds for a cached node to be active in the cache before they become stale.
    </description>
  </property>
  <property>
    <name>hive.metastore.aggregate.stats.cache.max.writer.wait</name>
    <value>5000ms</value>
    <description>
      Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is msec if not specified.
      Number of milliseconds a writer will wait to acquire the writelock before giving up.
    </description>
  </property>
  <property>
    <name>hive.metastore.aggregate.stats.cache.max.reader.wait</name>
    <value>1000ms</value>
    <description>
      Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is msec if not specified.
      Number of milliseconds a reader will wait to acquire the readlock before giving up.
    </description>
  </property>
  <property>
    <name>hive.metastore.aggregate.stats.cache.max.full</name>
    <value>0.9</value>
    <description>Maximum cache full % after which the cache cleaner thread kicks in.</description>
  </property>
  <property>
    <name>hive.metastore.aggregate.stats.cache.clean.until</name>
    <value>0.8</value>
    <description>The cleaner thread cleans until cache reaches this % full size.</description>
  </property>
  <property>
    <name>hive.metadata.export.location</name>
    <value/>
    <description>
      When used in conjunction with the org.apache.hadoop.hive.ql.parse.MetaDataExportListener pre event listener, 
      it is the location to which the metadata will be exported. The default is an empty string, which results in the 
      metadata being exported to the current user's home directory on HDFS.
    </description>
  </property>
  <property>
    <name>hive.metadata.move.exported.metadata.to.trash</name>
    <value>true</value>
    <description>
      When used in conjunction with the org.apache.hadoop.hive.ql.parse.MetaDataExportListener pre event listener, 
      this setting determines if the metadata that is exported will subsequently be moved to the user's trash directory 
      alongside the dropped table data. This ensures that the metadata will be cleaned up along with the dropped table data.
    </description>
  </property>
  <property>
    <name>hive.cli.errors.ignore</name>
    <value>false</value>
    <description/>
  </property>
  <property>
    <name>hive.cli.print.current.db</name>
    <value>false</value>
    <description>Whether to include the current database in the Hive prompt.</description>
  </property>
  <property>
    <name>hive.cli.prompt</name>
    <value>hive</value>
    <description>
      Command line prompt configuration value. Other hiveconf can be used in this configuration value. 
      Variable substitution will only be invoked at the Hive CLI startup.
    </description>
  </property>
  <property>
    <name>hive.cli.pretty.output.num.cols</name>
    <value>-1</value>
    <description>
      The number of columns to use when formatting output generated by the DESCRIBE PRETTY table_name command.
      If the value of this property is -1, then Hive will use the auto-detected terminal width.
    </description>
  </property>
  <property>
    <name>hive.metastore.fs.handler.class</name>
    <value>org.apache.hadoop.hive.metastore.HiveMetaStoreFsImpl</value>
    <description/>
  </property>
  <property>
    <name>hive.session.id</name>
    <value/>
    <description/>
  </property>
  <property>
    <name>hive.session.silent</name>
    <value>false</value>
    <description/>
  </property>
  <property>
    <name>hive.session.history.enabled</name>
    <value>false</value>
    <description>Whether to log Hive query, query plan, runtime statistics etc.</description>
  </property>
  <property>
    <name>hive.query.string</name>
    <value/>
    <description>Query being executed (might be multiple per a session)</description>
  </property>
  <property>
    <name>hive.query.id</name>
    <value/>
    <description>ID for query being executed (might be multiple per a session)</description>
  </property>
  <property>
    <name>hive.jobname.length</name>
    <value>50</value>
    <description>max jobname length</description>
  </property>
  <property>
    <name>hive.jar.path</name>
    <value/>
    <description>The location of hive_cli.jar that is used when submitting jobs in a separate jvm.</description>
  </property>
  <property>
    <name>hive.aux.jars.path</name>
    <value/>
    <description>The location of the plugin jars that contain implementations of user defined functions and serdes.</description>
  </property>
  <property>
    <name>hive.reloadable.aux.jars.path</name>
    <value/>
    <description>Jars can be renewed by executing reload command. And these jars can be used as the auxiliary classes like creating a UDF or SerDe.</description>
  </property>
  <property>
    <name>hive.added.files.path</name>
    <value/>
    <description>This an internal parameter.</description>
  </property>
  <property>
    <name>hive.added.jars.path</name>
    <value/>
    <description>This an internal parameter.</description>
  </property>
  <property>
    <name>hive.added.archives.path</name>
    <value/>
    <description>This an internal parameter.</description>
  </property>
  <property>
    <name>hive.auto.progress.timeout</name>
    <value>0s</value>
    <description>
      Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
      How long to run autoprogressor for the script/UDTF operators.
      Set to 0 for forever.
    </description>
  </property>
  <property>
    <name>hive.script.auto.progress</name>
    <value>false</value>
    <description>
      Whether Hive Transform/Map/Reduce Clause should automatically send progress information to TaskTracker 
      to avoid the task getting killed because of inactivity.  Hive sends progress information when the script is