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https://issues.apache.org/jira/browse/MAPREDUCE-733?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12729147#action_12729147
]
Iyappan Srinivasan commented on MAPREDUCE-733:
----------------------------------------------
I ran TestTrackerBlacklistAcrossJobs and it passed and logs do not have
"java.io.IOException: java.lang.RuntimeException". I also brought up a
cluster, submitted jobs randomly and killed some task attempts and did not come
across this string in jobtracker log.
> When running ant test TestTrackerBlacklistAcrossJobs, losing task tracker
> heartbeat exception occurs.
> ------------------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-733
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-733
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: tasktracker
> Affects Versions: 0.21.0
> Reporter: Iyappan Srinivasan
> Assignee: Arun C Murthy
> Fix For: 0.21.0
>
> Attachments: MAPREDUCE-733-1.patch, MAPREDUCE-733_0_20090708.patch,
> MAPREDUCE-733_0_20090708_yhadoop20.patch
>
>
> When running ant test TestTrackerBlacklistAcrossJobs, losing task tracker
> heartbeat.
> It seems when a task tracker is killed , it throws exception. Instead it
> should catch it and process it and allow the rest of the flow to go through.
> 2009-07-08 11:58:26,116 INFO ipc.Server (Server.java:run(973)) - IPC Server
> handler 7 on 40193, call
> heartbeat(org.apache.hadoop.mapred.tasktrackersta...@13ec758, false, false,
> true, 6) from 127.0.0.1:40200: error: java.io.IOException:
> java.lang.RuntimeException: tracker_host1.rack.com:localhost/127.0.0.1:40197
> already has slots reserved for null; being asked to un-reserve for
> job_200907081158_0001
> java.io.IOException: java.lang.RuntimeException:
> tracker_host1.rack.com:localhost/127.0.0.1:40197 already has slots reserved
> for null; being asked to un-reserve for job_200907081158_0001
> at
> org.apache.hadoop.mapreduce.server.jobtracker.TaskTracker.unreserveSlots(TaskTracker.java:162)
> at
> org.apache.hadoop.mapred.JobInProgress.addTrackerTaskFailure(JobInProgress.java:1580)
> at
> org.apache.hadoop.mapred.JobInProgress.failedTask(JobInProgress.java:2908)
> at
> org.apache.hadoop.mapred.JobInProgress.updateTaskStatus(JobInProgress.java:1025)
> at
> org.apache.hadoop.mapred.JobTracker.updateTaskStatuses(JobTracker.java:3869)
> at
> org.apache.hadoop.mapred.JobTracker.processHeartbeat(JobTracker.java:3081)
> at org.apache.hadoop.mapred.JobTracker.heartbeat(JobTracker.java:2819)
> at sun.reflect.GeneratedMethodAccessor7.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$Server.call(RPC.java:508)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:964)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:960)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:396)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:958)
> 2009-07-08 11:58:26,162 INFO mapred.TaskTracker
> (TaskTracker.java:transmitHeartBeat(1196)) - Resending 'status' to
> 'localhost' with reponseId '6
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