Dmitry Goldenberg created HDFS-11367:
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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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