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From "Vinod K V (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5336) NPE in heartbeat when the configured topology script doesn't exist
Date Thu, 26 Feb 2009 11:17:01 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5336?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12676961#action_12676961
] 

Vinod K V commented on HADOOP-5336:
-----------------------------------


Here's the trace:
{code}
2009-02-26 10:41:31,975 WARN org.apache.hadoop.net.ScriptBasedMapping: java.io.IOException:
Cannot run program "<myPath>/topologyProgram" (in directory "<my-hadoop-home>"):
java.io.IOException: error=13, Permission denied
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:459)
        at org.apache.hadoop.util.Shell.runCommand(Shell.java:149)
        at org.apache.hadoop.util.Shell.run(Shell.java:134)
        at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:286)
        at org.apache.hadoop.net.ScriptBasedMapping$RawScriptBasedMapping.runResolveCommand(ScriptBasedMapping.java:148)
        at org.apache.hadoop.net.ScriptBasedMapping$RawScriptBasedMapping.resolve(ScriptBasedMapping.java:94)
        at org.apache.hadoop.net.CachedDNSToSwitchMapping.resolve(CachedDNSToSwitchMapping.java:59)
        at org.apache.hadoop.mapred.JobTracker.resolveAndAddToTopology(JobTracker.java:2120)
        at org.apache.hadoop.mapred.JobTracker.addNewTracker(JobTracker.java:2113)
        at org.apache.hadoop.mapred.JobTracker.processHeartbeat(JobTracker.java:2489)
        at org.apache.hadoop.mapred.JobTracker.heartbeat(JobTracker.java:2289)
        at sun.reflect.GeneratedMethodAccessor8.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:508)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:959)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:955)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:396)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:953)
Caused by: java.io.IOException: java.io.IOException: error=13, Permission denied
        at java.lang.UNIXProcess.<init>(UNIXProcess.java:148)
        at java.lang.ProcessImpl.start(ProcessImpl.java:65)
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:452)
        ... 19 more
{code}

{code}
2009-02-26 10:41:31,975 INFO org.apache.hadoop.ipc.Server: IPC Server handler 62 on 52000,
call heartbeat(org.apache.hadoop.mapred.TaskTrackerStatus@1b79c945, true, true, true, -1)
from 
98.137.102.152:47264: error: java.io.IOException: java.lang.NullPointerException
java.io.IOException: java.lang.NullPointerException
        at org.apache.hadoop.mapred.JobTracker.resolveAndAddToTopology(JobTracker.java:2121)
        at org.apache.hadoop.mapred.JobTracker.addNewTracker(JobTracker.java:2113)
        at org.apache.hadoop.mapred.JobTracker.processHeartbeat(JobTracker.java:2489)
        at org.apache.hadoop.mapred.JobTracker.heartbeat(JobTracker.java:2289)
        at sun.reflect.GeneratedMethodAccessor8.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$1.run(Server.java:959)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:955)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:396)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:953)
{code}

JT is alive all along, returning NPEs in TTs heartbeats.

> NPE in heartbeat when the configured topology script doesn't exist
> ------------------------------------------------------------------
>
>                 Key: HADOOP-5336
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5336
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>            Reporter: Vinod K V
>


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