[HADOOP-2087] Errors for subsequent requests for file creation after original DFSClient goes down..

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Duplicate
• Assignee: Konstantin Shvachko
• Reporter: Gautam Kowshik
• Created: 22/Oct/07 15:04
• Updated: 08/Jul/09 16:42
• Resolved: 27/Nov/07 02:15

Description

task task_200710200555_0005_m_000725_0 started writing a file and the Node went down.. so all following file creation attempts were returned with AlreadyBeingCreatedException
I think the dfs should handle cases wherein, if a dfsclient goes down between file creation, subsequent creates to the same file could be allowed.

2007-10-20 06:23:51,189 INFO org.apache.hadoop.mapred.TaskInProgress: Error from task_200710200555_0005_m_000725_0: Task task_200710200555_0005_m_000725_0 failed to report status for 606 seconds. Killing!
2007-10-20 06:23:51,189 INFO org.apache.hadoop.mapred.JobTracker: Removed completed task 'task_200710200555_0005_m_000725_0' from '[tracker_address]:/127.0.0.1:44198'
2007-10-20 06:23:51,209 INFO org.apache.hadoop.mapred.JobInProgress: Choosing normal task tip_200710200555_0005_m_000725
2007-10-20 06:23:51,209 INFO org.apache.hadoop.mapred.JobTracker: Adding task 'task_200710200555_0005_m_000725_1' to tip tip_200710200555_0005_m_000725, for tracker '[tracker_address]:/127.0.0.1:50914'
2007-10-20 06:28:54,991 INFO org.apache.hadoop.mapred.TaskInProgress: Error from task_200710200555_0005_m_000725_1: org.apache.hadoop.ipc.RemoteException: org.apache.hadoop.dfs.AlreadyBeingCreatedException: failed to create file /benchmarks/TestDFSIO/io_data/test_io_825 for DFSClient_task_200710200555_0005_m_000725_1 on client 72.30.50.198, because this file is already being created by DFSClient_task_200710200555_0005_m_000725_0 on 72.30.53.224
at org.apache.hadoop.dfs.FSNamesystem.startFileInternal(FSNamesystem.java:881)
at org.apache.hadoop.dfs.FSNamesystem.startFile(FSNamesystem.java:806)
at org.apache.hadoop.dfs.NameNode.create(NameNode.java:276)
at sun.reflect.GeneratedMethodAccessor10.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:379)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:596)

Issue Links

• duplicates: HADOOP-1130 Remove unused ClientFinalizer in DFSClient
• relates to: MAPREDUCE-54 distcp failed due to problem in creating files