異常堆棧如下：

2017-10-20 00:00:12,340 ERROR [com.ultrapower.secsight.util.HdfsUtil] - 追加寫入文件失敗！
org.apache.hadoop.ipc.RemoteException(java.io.IOException): append: lastBlock=blk_1075691975_50802816 of src=/hebei/stdlog/std_log0001/20171016/p0001 is not sufficiently replicated yet.
    at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.appendFileInternal(FSNamesystem.java:
 
2915)
    at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.appendFileInt(FSNamesystem.java:3186)
    at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.appendFile(FSNamesystem.java:3149)
    at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.append(NameNodeRpcServer.java:611)
    at org.apache.hadoop.hdfs.server.namenode.AuthorizationProviderProxyClientProtocol.append(AuthorizationProviderProxyClientProtocol.java:
 
124)
    at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.append(ClientNamenodeProtocolServerSideTranslatorPB.java:416)
    at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
    at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:
 
617)
    at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1060)
    at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2086)
    at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2082)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:422)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1671)
    at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2080)

    at org.apache.hadoop.ipc.Client.call(Client.java:1469)
    at org.apache.hadoop.ipc.Client.call(Client.java:1400)
    at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:232)
    at com.sun.proxy.$Proxy14.append(Unknown Source)
    at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.append(ClientNamenodeProtocolTranslatorPB.java:313)
    at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
    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.$Proxy15.append(Unknown Source)
    at org.apache.hadoop.hdfs.DFSClient.callAppend(DFSClient.java:1756)
    at org.apache.hadoop.hdfs.DFSClient.append(DFSClient.java:1792)
    at org.apache.hadoop.hdfs.DFSClient.append(DFSClient.java:1785)
    at org.apache.hadoop.hdfs.DistributedFileSystem$4.doCall(DistributedFileSystem.java:323)
    at org.apache.hadoop.hdfs.DistributedFileSystem$4.doCall(DistributedFileSystem.java:319)
    at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
    at org.apache.hadoop.hdfs.DistributedFileSystem.append(DistributedFileSystem.java:319)
    at org.apache.hadoop.fs.FileSystem.append(FileSystem.java:1163)
    at com.ultrapower.secsight.util.HdfsUtil.appendWriteFile(HdfsUtil.java:309)
    at com.ultrapower.secsight.job.sync.writer.HDFSWriter.write(HDFSWriter.java:60)
    at com.ultrapower.secsight.job.maker.RunnerJob.lambda$sync$2(RunnerJob.java:130)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

發生的場景：

　　hadoop 2.6.1版本

　　追加HDFS過於頻繁！！執行文件復制時出錯。

If I run fsck it says the file is corrupt - missing one block. Sometimes the filesystem gets healthy with a random combination of running balancer/namenode recovery/hdfs dfs -setrep. After running the append for a while, the original problem reappears. I even once removed one node already which had corrupt data and the system got 100 % healthy without any problems - for a while.

https://stackoverflow.com/questions/26361470/not-sufficiently-replicated-yet-when-appending-to-a-file-in-hdfs

【使用時發生的意外】file is not sufficiently replicated yet