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From "Dmitry Goldenberg (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-11367) AlreadyBeingCreatedException "current leaseholder is trying to recreate file" when trying to append to file
Date Wed, 25 Jan 2017 14:02:26 GMT
Dmitry Goldenberg created HDFS-11367:
----------------------------------------

             Summary: AlreadyBeingCreatedException "current leaseholder is trying to recreate
file" when trying to append to file
                 Key: HDFS-11367
                 URL: https://issues.apache.org/jira/browse/HDFS-11367
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: hdfs-client
    Affects Versions: 2.5.0
         Environment: Red Hat Enterprise Linux Server release 6.8

            Reporter: Dmitry Goldenberg


We have code which creates a file in HDFS and continuously appends lines to the file, then
closes the file at the end. This is done by a single dedicated thread.

We specifically instrumented the code to make sure only one 'client'/thread ever writes to
the file because we were seeing "current leaseholder is trying to recreate file" errors.

For some background see this for example: https://community.cloudera.com/t5/Storage-Random-Access-HDFS/How-to-append-files-to-HDFS-with-Java-quot-current-leaseholder/m-p/41369

This issue is very critical to us as any error terminates a mission critical application in
production.

Intermittently, we see the below exception, regardless of what our code is doing which is
create the file, keep appending, then close:

org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.protocol.AlreadyBeingCreatedException):
failed to create file /data/records_20170125_1.txt for DFSClient_NONMAPREDUCE_-167421175_1
for client 1XX.2XX.1XX.XXX because current leaseholder is trying to recreate file.
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.recoverLeaseInternal(FSNamesystem.java:3075)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.appendFileInternal(FSNamesystem.java:2905)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.appendFileInt(FSNamesystem.java:3189)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.appendFile(FSNamesystem.java:3153)
        at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.append(NameNodeRpcServer.java:612)
        at org.apache.hadoop.hdfs.server.namenode.AuthorizationProviderProxyClientProtocol.append(AuthorizationProviderProxyClientProtocol.java:125)
        at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.append(ClientNamenodeProtocolServerSideTranslatorPB.java:414)
        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:1073)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2086)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2082)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:415)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1767)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2080)
 
        at org.apache.hadoop.ipc.Client.call(Client.java:1411)
        at org.apache.hadoop.ipc.Client.call(Client.java:1364)
        at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:206)
        at com.sun.proxy.$Proxy24.append(Unknown Source)
        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:483)
        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.$Proxy24.append(Unknown Source)
        at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.append(ClientNamenodeProtocolTranslatorPB.java:282)
        at org.apache.hadoop.hdfs.DFSClient.callAppend(DFSClient.java:1586)
        at org.apache.hadoop.hdfs.DFSClient.append(DFSClient.java:1626)
        at org.apache.hadoop.hdfs.DFSClient.append(DFSClient.java:1614)
        at org.apache.hadoop.hdfs.DistributedFileSystem$4.doCall(DistributedFileSystem.java:313)
        at org.apache.hadoop.hdfs.DistributedFileSystem$4.doCall(DistributedFileSystem.java:309)
        at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
        at org.apache.hadoop.hdfs.DistributedFileSystem.append(DistributedFileSystem.java:309)
        at org.apache.hadoop.fs.FileSystem.append(FileSystem.java:1161)
        at com.myco.MyAppender.getOutputStream(MyAppender.java:147)



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