Enis Soztutar created HBASE-12074:
-------------------------------------
Summary: TestLogRollingNoCluster#testContendedLogRolling() failed
Key: HBASE-12074
URL: https://issues.apache.org/jira/browse/HBASE-12074
Project: HBase
Issue Type: Bug
Reporter: Enis Soztutar
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.
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