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https://issues.apache.org/jira/browse/HADOOP-2087?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Mukund Madhugiri updated HADOOP-2087:
-------------------------------------
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)
was:
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)
I went thru the logs from the latest run and here is the information from the
dfsio500 run,
In the JT logs, there are _0 tasks (10 of them) that fail to report status for
600+ seconds and are killed and a respective _1 task is added. This _1 task is
the one that fails to write to the file and throws the
AlreadyBeingCreatedException. Seems like task _0 was not cleanly killed?
Exception log snippet from NN:
2007-10-25 06:07:52,665 WARN org.apache.hadoop.dfs.StateChange: DIR*
NameSystem.startFile: failed to create file
/benchmarks/TestDFSIO/io_data/test_io_346 for
DFSClient_task_200710250537_0003_m_000246_1 on client 72.30.51.88, because this
file is already being created by DFSClient_task_200710250537_0003_m_000246_0 on
72.30.53.224
2007-10-25 06:07:52,668 INFO org.apache.hadoop.ipc.Server: IPC Server handler
22 on 8020, call create(/benchmarks/TestDFSIO/io_data/test_io_346,
DFSClient_task_200710250537_0003_m_000246_1, true, 3, 134217728) from
72.30.51.88:42152: error: org.apache.hadoop.dfs.AlreadyBeingCreatedException:
failed to create file /benchmarks/TestDFSIO/io_data/test_io_346 for
DFSClient_task_200710250537_0003_m_000246_1 on client 72.30.51.88, because this
file is already being created by DFSClient_task_200710250537_0003_m_000246_0 on
72.30.53.224
org.apache.hadoop.dfs.AlreadyBeingCreatedException: failed to create file
/benchmarks/TestDFSIO/io_data/test_io_346 for
DFSClient_task_200710250537_0003_m_000246_1 on client 72.30.51.88, because this
file is already being created by DFSClient_task_200710250537_0003_m_000246_0 on
72.30.53.224
Exception log snippet from JT:
2007-10-25 05:44:34,742 INFO org.apache.hadoop.mapred.JobTracker: Adding task
'task_200710250537_0003_m_000246_0' to tip tip_200710250537_0003_m_000246, for
tracker 'tracker_kry2996.inktomisearch.com:/127.0.0.1:54641'
2007-10-25 06:07:51,219 INFO org.apache.hadoop.mapred.TaskInProgress: Error
from task_200710250537_0003_m_000246_0: Task task_200710250537_0003_m_000246_0
failed to report status for 605 seconds. Killing!
2007-10-25 06:07:51,220 INFO org.apache.hadoop.mapred.JobTracker: Removed
completed task 'task_200710250537_0003_m_000246_0' from
'tracker_kry2996.inktomisearch.com:/127.0.0.1:54641'
2007-10-25 06:07:51,221 INFO org.apache.hadoop.mapred.JobTracker: Adding task
'task_200710250537_0003_m_000246_1' to tip tip_200710250537_0003_m_000246, for
tracker 'tracker_kry2778.inktomisearch.com:/127.0.0.1:41150'
2007-10-25 06:09:09,326 INFO org.apache.hadoop.mapred.JobInProgress: Task
'task_200710250537_0003_m_000246_1' has completed
tip_200710250537_0003_m_000246 successfully.
2007-10-25 06:13:16,060 INFO org.apache.hadoop.mapred.JobTracker: Removed
completed task 'task_200710250537_0003_m_000246_1' from
'tracker_kry2778.inktomisearch.com:/127.0.0.1:41150'
2007-10-25 06:13:21,374 INFO org.apache.hadoop.mapred.JobTracker: Removed
completed task 'task_200710250537_0003_m_000246_0' from
'tracker_kry2996.inktomisearch.com:/127.0.0.1:54641'
> Errors for subsequent requests for file creation after original DFSClient
> goes down..
> -------------------------------------------------------------------------------------
>
> Key: HADOOP-2087
> URL: https://issues.apache.org/jira/browse/HADOOP-2087
> Project: Hadoop
> Issue Type: Bug
> Components: dfs
> Reporter: Gautam Kowshik
>
> 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)
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