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From "Devaraj Das (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7982) TestReplicationQueueFailover* runs for a minute, spews 3/4million lines complaining 'Filesystem closed', has an NPE, and still passes?
Date Tue, 05 Mar 2013 02:53:13 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7982?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13592985#comment-13592985
] 

Devaraj Das commented on HBASE-7982:
------------------------------------

I and [~jeffreyz] was looking at the logs, and it seemed like an RS didn't successfully abort.
It was kind of aborted, that led to the filesystem closing, but then it was trying to do some
filesystem operation and continuously failing. Jeffrey is looking at what is preventing the
RS from really aborting.

{noformat}
2013-02-26 09:56:22,351 ERROR [RegionServer:1;juno.apache.org,53545,1361872469173.logSyncer]
wal.FSHLog$LogSyncer(1012): Error while syncing, requesting close of hlog
java.io.IOException: Filesystem closed
        at org.apache.hadoop.hdfs.DFSClient.checkOpen(DFSClient.java:319)
        at org.apache.hadoop.hdfs.DFSClient.access$1200(DFSClient.java:78)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.sync(DFSClient.java:3843)
        at org.apache.hadoop.fs.FSDataOutputStream.sync(FSDataOutputStream.java:97)
        at org.apache.hadoop.io.SequenceFile$Writer.syncFs(SequenceFile.java:999)
        at org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogWriter.sync(SequenceFileLogWriter.java:248)
        at org.apache.hadoop.hbase.regionserver.wal.FSHLog.syncer(FSHLog.java:1120)
        at org.apache.hadoop.hbase.regionserver.wal.FSHLog.syncer(FSHLog.java:1058)
        at org.apache.hadoop.hbase.regionserver.wal.FSHLog.sync(FSHLog.java:1228)
        at org.apache.hadoop.hbase.regionserver.wal.FSHLog$LogSyncer.run(FSHLog.java:1010)
        at java.lang.Thread.run(Thread.java:722)
{noformat}
                
> TestReplicationQueueFailover* runs for a minute, spews 3/4million lines complaining 'Filesystem
closed', has an NPE, and still passes?
> --------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-7982
>                 URL: https://issues.apache.org/jira/browse/HBASE-7982
>             Project: HBase
>          Issue Type: Bug
>          Components: build
>            Reporter: stack
>            Assignee: Jeffrey Zhong
>            Priority: Blocker
>         Attachments: hbase-7982-NPE.patch
>
>
> I was trying to look at why the odd time Hudson OOMEs trying to make a report on 0.95
build #4 https://builds.apache.org/job/hbase-0.95/4/console:
> {code}
> ERROR: Failed to archive test reports
> hudson.util.IOException2: remote file operation failed: /home/jenkins/jenkins-slave/workspace/hbase-0.95
at hudson.remoting.Channel@151a4e3e:ubuntu3
> 	at hudson.FilePath.act(FilePath.java:861)
> 	at hudson.FilePath.act(FilePath.java:838)
> 	at hudson.tasks.junit.JUnitParser.parse(JUnitParser.java:87)
> 	at 
> ...
> Caused by: java.lang.OutOfMemoryError: Java heap space
> 	at java.nio.HeapCharBuffer.<init>(HeapCharBuffer.java:57)
> 	at java.nio.CharBuffer.allocate(CharBuffer.java:329)
> 	at java.nio.charset.CharsetDecoder.decode(CharsetDecoder.java:792)
> 	at java.nio.charset.Charset.decode(Charset.java:791)
> 	at hudson.tasks.junit.SuiteResult.<init>(SuiteResult.java:215)
> ...
> {code}
> We are trying to allocate a big buffer and failing.
> Looking at reports being generated, we have quite a few that are > 10MB in size:
> {code}
> durruti:0.95 stack$ find hbase-* -type f -size +10000k -exec ls -la {} \;
> -rw-r--r--@ 1 stack  staff  11126492 Feb 27 06:14 hbase-server/target/surefire-reports/org.apache.hadoop.hbase.backup.TestHFileArchiving-output.txt
> -rw-r--r--@ 1 stack  staff  13296009 Feb 27 05:47 hbase-server/target/surefire-reports/org.apache.hadoop.hbase.client.TestFromClientSide3-output.txt
> -rw-r--r--@ 1 stack  staff  10541898 Feb 27 05:47 hbase-server/target/surefire-reports/org.apache.hadoop.hbase.client.TestMultiParallel-output.txt
> -rw-r--r--@ 1 stack  staff  25344601 Feb 27 05:51 hbase-server/target/surefire-reports/org.apache.hadoop.hbase.client.TestRestoreSnapshotFromClient-output.txt
> -rw-r--r--@ 1 stack  staff  17966969 Feb 27 06:12 hbase-server/target/surefire-reports/org.apache.hadoop.hbase.regionserver.TestEndToEndSplitTransaction-output.txt
> -rw-r--r--@ 1 stack  staff  17699068 Feb 27 06:09 hbase-server/target/surefire-reports/org.apache.hadoop.hbase.regionserver.wal.TestHLogSplit-output.txt
> -rw-r--r--@ 1 stack  staff  17701832 Feb 27 06:07 hbase-server/target/surefire-reports/org.apache.hadoop.hbase.regionserver.wal.TestHLogSplitCompressed-output.txt
> -rw-r--r--@ 1 stack  staff  717853709 Feb 27 06:17 hbase-server/target/surefire-reports/org.apache.hadoop.hbase.replication.TestReplicationQueueFailover-output.txt
> -rw-r--r--@ 1 stack  staff  563616793 Feb 27 06:17 hbase-server/target/surefire-reports/org.apache.hadoop.hbase.replication.TestReplicationQueueFailoverCompressed-output.txt
> {code}
> ... with TestReplicationQueueFailover* being order of magnitude bigger than the others.
> Looking in the test I see both spewing between 800 and 900 thousand lines in about a
minute.  Here is their fixation:
> {code}
> 8908998 2013-02-27 06:17:48,176 ERROR [RegionServer:1;hemera.apache.org,35712,1361945801803.logSyncer]
wal.FSHLog$LogSyncer(1012): Error while syncing, requesting close of hlog.
> 8908999 java.io.IOException: Filesystem closed
> 8909000 ,...at org.apache.hadoop.hdfs.DFSClient.checkOpen(DFSClient.java:319)
> 8909001 ,...at org.apache.hadoop.hdfs.DFSClient.access$1200(DFSClient.java:78)
> 8909002 ,...at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.sync(DFSClient.java:3843)
> 8909003 ,...at org.apache.hadoop.fs.FSDataOutputStream.sync(FSDataOutputStream.java:97)
> 8909004 ,...at org.apache.hadoop.io.SequenceFile$Writer.syncFs(SequenceFile.java:999)
> 8909005 ,...at org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogWriter.sync(SequenceFileLogWriter.java:248)
> 8909006 ,...at org.apache.hadoop.hbase.regionserver.wal.FSHLog.syncer(FSHLog.java:1120)
> 8909007 ,...at org.apache.hadoop.hbase.regionserver.wal.FSHLog.syncer(FSHLog.java:1058)
> 8909008 ,...at org.apache.hadoop.hbase.regionserver.wal.FSHLog.sync(FSHLog.java:1228)
> 8909009 ,...at org.apache.hadoop.hbase.regionserver.wal.FSHLog$LogSyncer.run(FSHLog.java:1010)
> 8909010 ,...at java.lang.Thread.run(Thread.java:722)
> 8909011 2013-02-27 06:17:48,176 FATAL [RegionServer:1;hemera.apache.org,35712,1361945801803.logSyncer]
wal.FSHLog(1140): Could not sync. Requesting close of hlog
> 8909012 java.io.IOException: Filesystem closed
> 8909013 ,...at org.apache.hadoop.hdfs.DFSClient.checkOpen(DFSClient.java:319)
> 8909014 ,...at org.apache.hadoop.hdfs.DFSClient.access$1200(DFSClient.java:78)
> 8909015 ,...at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.sync(DFSClient.java:3843)
> 8909016 ,...at org.apache.hadoop.fs.FSDataOutputStream.sync(FSDataOutputStream.java:97)
> 8909017 ,...at org.apache.hadoop.io.SequenceFile$Writer.syncFs(SequenceFile.java:999)
> 8909018 ,...at org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogWriter.sync(SequenceFileLogWriter.java:248)
> 8909019 ,...at org.apache.hadoop.hbase.regionserver.wal.FSHLog.syncer(FSHLog.java:1120)
> 8909020 ,...at org.apache.hadoop.hbase.regionserver.wal.FSHLog.syncer(FSHLog.java:1058)
> 8909021 ,...at org.apache.hadoop.hbase.regionserver.wal.FSHLog.sync(FSHLog.java:1228)
> 8909022 ,...at org.apache.hadoop.hbase.regionserver.wal.FSHLog$LogSyncer.run(FSHLog.java:1010)
> 8909023 ,...at java.lang.Thread.run(Thread.java:722)
> ...
> {code}
> These tests are 'succeeding'?
> I also see in both:
> {code}
>    3891 java.lang.NullPointerException
>    3892 ,...at org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogReader.seek(SequenceFileLogReader.java:261)
>    3893 ,...at org.apache.hadoop.hbase.replication.regionserver.ReplicationHLogReaderManager.seek(ReplicationHLogReaderManager.java:103)
>    3894 ,...at org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.readAllEntriesToReplicateOrNextFile(ReplicationSource.java:415)
>    3895 ,...at org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.run(ReplicationSource.java:333)
> {code}

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