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https://issues.apache.org/jira/browse/HDFS-11367?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15850344#comment-15850344
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Manjunath Anand edited comment on HDFS-11367 at 2/2/17 7:09 PM:
----------------------------------------------------------------
As per the discussion since the exception is not reproducible even for a
million appends to same file even after running multiple times, marking this
JIRA as "Cannot Reproduce" for now. Please re-open in case of any findings.
was (Author: manju_hadoop):
As per the discussion since the exception is not reproducible even for a
million appends to same file even after running multiple times, marking this
JIRA as "Non Reproducible" for now. Please re-open in case of any findings.
> 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
> Assignee: Manjunath Anand
> Attachments: Appender.java
>
>
> 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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