[
https://issues.apache.org/jira/browse/HBASE-12074?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15596033#comment-15596033
]
Mikhail Antonov commented on HBASE-12074:
-----------------------------------------
Should this one be closed as a duplicate, as indicated by the linked jira?
> TestLogRollingNoCluster#testContendedLogRolling() failed
> --------------------------------------------------------
>
> Key: HBASE-12074
> URL: https://issues.apache.org/jira/browse/HBASE-12074
> Project: HBase
> Issue Type: Bug
> Reporter: Enis Soztutar
> Assignee: Stephen Yuan Jiang
>
> TestLogRollingNoCluster#testContendedLogRolling() failed on a 0.98 run. I am
> trying to understand the context.
> The failure is this:
> {code}
> java.lang.AssertionError
> at org.junit.Assert.fail(Assert.java:86)
> at org.junit.Assert.assertTrue(Assert.java:41)
> at org.junit.Assert.assertFalse(Assert.java:64)
> at org.junit.Assert.assertFalse(Assert.java:74)
> at
> org.apache.hadoop.hbase.regionserver.wal.TestLogRollingNoCluster.testContendedLogRolling(TestLogRollingNoCluster.java:80)
> {code}
> Caused because one of the Appenders calling FSHLog.sync() threw IOE because
> of concurrent close:
> {code}
> 4-09-23 16:36:39,530 FATAL [pool-1-thread-1-WAL.AsyncSyncer0]
> wal.FSHLog$AsyncSyncer(1246): Error while AsyncSyncer sync, request close of
> hlog
> java.io.IOException: java.lang.NullPointerException
> at
> org.apache.hadoop.hbase.regionserver.wal.ProtobufLogWriter.sync(ProtobufLogWriter.java:168)
> at
> org.apache.hadoop.hbase.regionserver.wal.FSHLog$AsyncSyncer.run(FSHLog.java:1241)
> at java.lang.Thread.run(Thread.java:722)
> Caused by: java.lang.NullPointerException
> at
> org.apache.hadoop.hbase.regionserver.wal.ProtobufLogWriter.sync(ProtobufLogWriter.java:165)
> ... 2 more
> 2014-09-23 16:36:39,531 INFO [32] wal.TestLogRollingNoCluster$Appender(137):
> Caught exception from Appender:32
> java.io.IOException: java.lang.NullPointerException
> at
> org.apache.hadoop.hbase.regionserver.wal.ProtobufLogWriter.sync(ProtobufLogWriter.java:168)
> at
> org.apache.hadoop.hbase.regionserver.wal.FSHLog$AsyncSyncer.run(FSHLog.java:1241)
> at java.lang.Thread.run(Thread.java:722)
> Caused by: java.lang.NullPointerException
> at
> org.apache.hadoop.hbase.regionserver.wal.ProtobufLogWriter.sync(ProtobufLogWriter.java:165)
> ... 2 more
> 2014-09-23 16:36:39,532 INFO [19] wal.TestLogRollingNoCluster$Appender(137):
> Caught exception from Appender:19
> java.io.IOException: java.lang.NullPointerException
> at
> org.apache.hadoop.hbase.regionserver.wal.ProtobufLogWriter.sync(ProtobufLogWriter.java:168)
> at
> org.apache.hadoop.hbase.regionserver.wal.FSHLog$AsyncSyncer.run(FSHLog.java:1241)
> at java.lang.Thread.run(Thread.java:722)
> Caused by: java.lang.NullPointerException
> at
> org.apache.hadoop.hbase.regionserver.wal.ProtobufLogWriter.sync(ProtobufLogWriter.java:165)
> ... 2 more
> {code}
> The code is:
> {code}
> public void sync() throws IOException {
> try {
> this.output.flush();
> this.output.sync();
> } catch (NullPointerException npe) {
> // Concurrent close...
> throw new IOException(npe);
> }
> }
> {code}
> I think the test case written exactly to catch this case:
> {code}
> * Spin up a bunch of threads and have them all append to a WAL. Roll the
> * WAL frequently to try and trigger NPE.
> {code}
> This is why I am reporting since I don't have much context. It may not be a
> test issue, but an actual bug.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
