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https://issues.apache.org/jira/browse/HADOOP-3807?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12622511#action_12622511
]
Amar Kamat commented on HADOOP-3807:
------------------------------------
Even I am seeing this error in the test case I have for HADOOP-3245.
{noformat}
[junit] 2008-08-14 15:43:07,296 ERROR mapred.TaskTracker
(TaskTracker.java:offerService(1039)) - Caught exception: java.io.IOException:
Call to localhost/127.0.0.1:34192 failed on local exception: null
[junit] at org.apache.hadoop.ipc.Client.call(Client.java:710)
[junit] at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:216)
[junit] at org.apache.hadoop.mapred.$Proxy7.heartbeat(Unknown Source)
[junit] at
org.apache.hadoop.mapred.TaskTracker.transmitHeartBeat(TaskTracker.java:1105)
[junit] at
org.apache.hadoop.mapred.TaskTracker.offerService(TaskTracker.java:942)
[junit] at
org.apache.hadoop.mapred.TaskTracker.run(TaskTracker.java:1448)
[junit] at
org.apache.hadoop.mapred.MiniMRCluster$TaskTrackerRunner.run(MiniMRCluster.java:186)
[junit] at java.lang.Thread.run(Thread.java:619)
[junit] Caused by: java.io.EOFException
[junit] at java.io.DataInputStream.readInt(DataInputStream.java:375)
[junit] at
org.apache.hadoop.ipc.Client$Connection.receiveResponse(Client.java:499)
[junit] at org.apache.hadoop.ipc.Client$Connection.run(Client.java:441)
[junit]
[junit] 2008-08-14 15:43:07,296 INFO mapred.TaskTracker
(TaskTracker.java:transmitHeartBeat(1081)) - Resending 'status' to 'localhost'
with reponseId '0
[junit] 2008-08-14 15:43:07,297 INFO mapred.JobTracker
(JobTracker.java:heartbeat(1637)) - Got heartbeat from:
tracker_host.com:localhost/127.0.0.1:33437 (initialContact: false
acceptNewTasks: true) with responseId: 0
[junit] 2008-08-14 15:43:07,298 INFO mapred.JobTracker
(JobTracker.java:addTaskTrackerStatus(1509)) - Adding tracker name
tracker_host.com:localhost/127.0.0.1:33437
[junit] 2008-08-14 15:43:07,298 WARN mapred.JobTracker
(JobTracker.java:processHeartbeat(1873)) - Status from unknown Tracker :
tracker_host.com:localhost/127.0.0.1:33437
[junit] 2008-08-14 15:43:07,301 INFO mapred.TaskTracker
(TaskTracker.java:reinitTaskTracker(1156)) - Recieved RenitTrackerAction from
JobTracker
[junit] 2008-08-14 15:43:07,303 WARN mapred.TaskTracker
(TaskTracker.java:run(1469)) - Reinitializing local state
[junit] 2008-08-14 15:43:07,303 INFO jvm.JvmMetrics
(JvmMetrics.java:init(62)) - Cannot initialize JVM Metrics with
processName=TaskTracker, sessionId= - already initialized
[junit] 2008-08-14 15:43:07,304 INFO mapred.TaskTracker
(TaskTracker.java:run(503)) - Shutting down: Map-events fetcher for all reduce
tasks on tracker_host.com:localhost/127.0.0.1:33437
[junit] 2008-08-14 15:43:07,304 INFO ipc.Server (Server.java:stop(992)) -
Stopping server on 33437
[junit] 2008-08-14 15:43:07,305 INFO metrics.RpcMetrics
(RpcMetrics.java:<init>(56)) - Initializing RPC Metrics with
hostName=TaskTracker, port=49696
[junit] 2008-08-14 15:43:07,305 INFO ipc.Server (Server.java:run(330)) -
Stopping IPC Server listener on 33437
[junit] 2008-08-14 15:43:07,305 INFO ipc.Server (Server.java:run(448)) -
IPC Server Responder: starting
[junit] 2008-08-14 15:43:07,308 INFO ipc.Server (Server.java:run(291)) -
IPC Server listener on 49696: starting
[junit] 2008-08-14 15:43:07,309 INFO ipc.Server (Server.java:run(920)) -
IPC Server handler 0 on 33437: exiting
[junit] 2008-08-14 15:43:07,309 INFO ipc.Server (Server.java:run(920)) -
IPC Server handler 1 on 33437: exiting
[junit] 2008-08-14 15:43:07,314 INFO ipc.Server (Server.java:run(869)) -
IPC Server handler 0 on 49696: starting
[junit] 2008-08-14 15:43:07,327 ERROR mapred.MiniMRCluster
(MiniMRCluster.java:run(191)) - task tracker 0 crashed
[junit] java.lang.NullPointerException
[junit] at
org.apache.hadoop.mapred.TaskTracker.initialize(TaskTracker.java:405)
[junit] at
org.apache.hadoop.mapred.TaskTracker.run(TaskTracker.java:1470)
[junit] at
org.apache.hadoop.mapred.MiniMRCluster$TaskTrackerRunner.run(MiniMRCluster.java:186)
[junit] at java.lang.Thread.run(Thread.java:619)
[junit] 2008-08-14 15:43:07,329 INFO ipc.Server (Server.java:run(869)) -
IPC Server handler 1 on 49696: starting
[junit] 2008-08-14 15:43:07,329 INFO ipc.Server (Server.java:run(502)) -
Stopping IPC Server Responder
{noformat}
The lines in {{TaskTracker.java}} that correspond to it are
{code}
this.taskReportServer =
RPC.getServer(this, bindAddress, tmpPort, max, false, this.fConf);
this.taskReportServer.start();
{code}
> task attempt failing to report status just after the intialization
> ------------------------------------------------------------------
>
> Key: HADOOP-3807
> URL: https://issues.apache.org/jira/browse/HADOOP-3807
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Reporter: Amareshwari Sriramadasu
> Fix For: 0.19.0
>
>
> In sort500 runs, I noticed task attempts failing to report status : saying
> Task attempt_200807220707_0002_r_000336_1 failed to report status for 605
> seconds. Killing!
> And the task logs has NullPointerException saying:
> *stderr logs*
> Exception in thread "main" java.lang.NullPointerException
> at
> org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:2146)
> Task tracker logs for the same attempt are:
> 2008-07-22 08:07:37,110 INFO org.apache.hadoop.mapred.TaskTracker:
> LaunchTaskAction: attempt_200807220707_0002_r_000336_1
> 2008-07-22 08:17:42,144 INFO org.apache.hadoop.mapred.TaskTracker:
> attempt_200807220707_0002_r_000336_1: Task
> attempt_200807220707_0002_r_000336_1 failed toreport status for 605 seconds.
> Killing!
> 2008-07-22 08:17:42,162 INFO org.apache.hadoop.mapred.TaskTracker: About to
> purge task: attempt_200807220707_0002_r_000336_1
> 2008-07-22 08:17:42,163 INFO org.apache.hadoop.mapred.TaskRunner:
> attempt_200807220707_0002_r_000336_1 done; removing files.
> 2008-07-22 08:18:15,481 WARN org.apache.hadoop.mapred.TaskTracker: Unknown
> child task finshed: attempt_200807220707_0002_r_000336_1. Ignored.
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