問題: 通過sqoop工具將mysql中的資料匯入到hive中

sqoop import --connect jdbc:mysql://master:3306/mf --username root --password xxxx --table t_activity_page --split-by id --delete-target-dir --hive-import -m 1

報如下錯誤：

ERROR exec.DDLTask: java.lang.NoSuchMethodError: com.fasterxml.jackson.databind.ObjectMapper.readerFor(Ljava/lang/Class;)Lcom/fasterxml/jackson/databind/ObjectReader;
	at org.apache.hadoop.hive.common.StatsSetupConst$ColumnStatsAccurate.<clinit>(StatsSetupConst.java:165)
	at org.apache.hadoop.hive.common.StatsSetupConst.parseStatsAcc(StatsSetupConst.java:297)
	at org.apache.hadoop.hive.common.StatsSetupConst.setBasicStatsState(StatsSetupConst.java:230)
	at org.apache.hadoop.hive.common.StatsSetupConst.setBasicStatsStateForCreateTable(StatsSetupConst.java:292)
	at org.apache.hadoop.hive.ql.plan.CreateTableDesc.toTable(CreateTableDesc.java:839)
	at org.apache.hadoop.hive.ql.exec.DDLTask.createTable(DDLTask.java:4321)
	at org.apache.hadoop.hive.ql.exec.DDLTask.execute(DDLTask.java:354)
	at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:199)
	at org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:100)
	at org.apache.hadoop.hive.ql.Driver.launchTask(Driver.java:2183)
	at org.apache.hadoop.hive.ql.Driver.execute(Driver.java:1839)
	at org.apache.hadoop.hive.ql.Driver.runInternal(Driver.java:1526)
	at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1237)
	at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1227)
 

原因： sqoop與hive使用的jackson包的版本衝突導致 解決辦法： 將hive的lib目錄下的jackson相關jar包拷貝到sqoop的lib目錄下

1. 先備份好sqoop lib目錄下的所有jackson jar包
2. 將hive lib下的jackson jar包拷貝到sqoop lib目錄下。

cp $HIVE_HOME/lib/jackson*.jar $SQOOP_HOME/lib/