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https://issues.apache.org/jira/browse/NUTCH-1640?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ian H. updated NUTCH-1640:
--------------------------
Comment: was deleted
(was: Julien, thanks for clarification. So I'm also attaching the direct patch
for Nutch 1.7.
I.)
> OOM in ParseSegment Phase
> -------------------------
>
> Key: NUTCH-1640
> URL: https://issues.apache.org/jira/browse/NUTCH-1640
> Project: Nutch
> Issue Type: Bug
> Components: parser
> Affects Versions: 1.7
> Environment: RHEL 6.2 x86_64
> Reporter: Mitesh Singh Jat
> Attachments: NUTCH-1640.patch
>
>
> The nutch ParseSegment phase fails after 2 runs on same TaskTracker, with the
> following Exception:
> {noformat}
> Exception in thread "main" org.apache.hadoop.ipc.RemoteException:
> java.io.IOException: java.lang.OutOfMemoryError: unable to create new native
> thread
> at java.lang.Thread.start0(Native Method)
> at java.lang.Thread.start(Thread.java:640)
> at
> org.apache.hadoop.mapred.JvmManager$JvmManagerForType$JvmRunner.kill(JvmManager.java:553)
> at
> org.apache.hadoop.mapred.JvmManager$JvmManagerForType.killJvmRunner(JvmManager.java:317)
> at
> org.apache.hadoop.mapred.JvmManager$JvmManagerForType.killJvm(JvmManager.java:297)
> at
> org.apache.hadoop.mapred.JvmManager$JvmManagerForType.taskKilled(JvmManager.java:289)
> at org.apache.hadoop.mapred.JvmManager.taskKilled(JvmManager.java:158)
> at org.apache.hadoop.mapred.TaskRunner.kill(TaskRunner.java:802)
> at
> org.apache.hadoop.mapred.TaskTracker$TaskInProgress.kill(TaskTracker.java:3315)
> at
> org.apache.hadoop.mapred.TaskTracker$TaskInProgress.jobHasFinished(TaskTracker.java:3287)
> at org.apache.hadoop.mapred.TaskTracker.purgeTask(TaskTracker.java:2316)
> at
> org.apache.hadoop.mapred.TaskTracker.fatalError(TaskTracker.java:3710)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:587)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1444)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1440)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:396)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1232)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1438)
> at org.apache.hadoop.ipc.Client.call(Client.java:1118)
> at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:229)
> at $Proxy1.fatalError(Unknown Source)
> at org.apache.hadoop.mapred.Child.main(Child.java:310)
> {noformat}
> Whereas similar parsing when done in Nutch Fetcher Phase (fetcher.parse=true,
> fetcher.store.content=false) does not give such issue.
> Hence, on analysing the code of Fetcher and ParseSegment, it seems the issue
> should be related to creation parseResult foreach url in ParseSegment.java.
> {code}
> 95 ParseResult parseResult = null;
> 96 try {
> 97 parseResult = new ParseUtil(getConf()).parse(content); // <*****
> 98 } catch (Exception e) {
> 99 LOG.warn("Error parsing: " + key + ": " +
> StringUtils.stringifyException(e));
> 100 return;
> 101 }
> {code}
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