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https://issues.apache.org/jira/browse/HBASE-4832?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Eugene Koontz reassigned HBASE-4832:
------------------------------------
Assignee: Eugene Koontz
> TestRegionServerCoprocessorExceptionWithAbort fails if the region server
> stops too fast
> ---------------------------------------------------------------------------------------
>
> Key: HBASE-4832
> URL: https://issues.apache.org/jira/browse/HBASE-4832
> Project: HBase
> Issue Type: Bug
> Components: coprocessors, test
> Affects Versions: 0.94.0
> Reporter: nkeywal
> Assignee: Eugene Koontz
> Priority: Minor
> Attachments: 4832_trunk_hregionserver.patch
>
>
> The current implementation of HRegionServer#stop is
> {noformat}
> public void stop(final String msg) {
> this.stopped = true;
> LOG.info("STOPPED: " + msg);
> synchronized (this) {
> // Wakes run() if it is sleeping
> notifyAll(); // FindBugs NN_NAKED_NOTIFY
> }
> }
> {noformat}
> The notification is sent on the wrong object and does nothing. As a
> consequence, the region server continues to sleep instead of waking up and
> stopping immediately. A correct implementation is:
> {noformat}
> public void stop(final String msg) {
> this.stopped = true;
> LOG.info("STOPPED: " + msg);
> // Wakes run() if it is sleeping
> sleeper.skipSleepCycle();
> }
> {noformat}
> Then the region server stops immediately. This makes the region server stops
> 0,5s faster on average, which is quite useful for unit tests.
> However, with this fix, TestRegionServerCoprocessorExceptionWithAbort does
> not work.
> It likely because the code does no expect the region server to stop that fast.
> The exception is:
> {noformat}
> testExceptionFromCoprocessorDuringPut(org.apache.hadoop.hbase.coprocessor.TestRegionServerCoprocessorExceptionWithAbort)
> Time elapsed: 30.06 sec <<< ERROR!
> java.lang.Exception: test timed out after 30000 milliseconds
> at java.lang.Throwable.fillInStackTrace(Native Method)
> at java.lang.Throwable.<init>(Throwable.java:196)
> at java.lang.Exception.<init>(Exception.java:41)
> at java.lang.InterruptedException.<init>(InterruptedException.java:48)
> at java.lang.Thread.sleep(Native Method)
> at
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegionInMeta(HConnectionManager.java:1019)
> at
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:804)
> at
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.relocateRegion(HConnectionManager.java:778)
> at
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getRegionLocation(HConnectionManager.java:697)
> at
> org.apache.hadoop.hbase.client.ServerCallable.connect(ServerCallable.java:75)
> at
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getRegionServerWithRetries(HConnectionManager.java:1280)
> at org.apache.hadoop.hbase.client.HTable.getRowOrBefore(HTable.java:585)
> at
> org.apache.hadoop.hbase.client.MetaScanner.metaScan(MetaScanner.java:154)
> at
> org.apache.hadoop.hbase.client.MetaScanner.access$000(MetaScanner.java:52)
> at
> org.apache.hadoop.hbase.client.MetaScanner$1.connect(MetaScanner.java:130)
> at
> org.apache.hadoop.hbase.client.MetaScanner$1.connect(MetaScanner.java:127)
> at
> org.apache.hadoop.hbase.client.HConnectionManager.execute(HConnectionManager.java:357)
> at
> org.apache.hadoop.hbase.client.MetaScanner.metaScan(MetaScanner.java:127)
> at
> org.apache.hadoop.hbase.client.MetaScanner.metaScan(MetaScanner.java:103)
> at
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.prefetchRegionCache(HConnectionManager.java:866)
> at
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegionInMeta(HConnectionManager.java:920)
> at
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:808)
> at
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.processBatchCallback(HConnectionManager.java:1469)
> at
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.processBatch(HConnectionManager.java:1354)
> at org.apache.hadoop.hbase.client.HTable.flushCommits(HTable.java:892)
> at org.apache.hadoop.hbase.client.HTable.doPut(HTable.java:750)
> at org.apache.hadoop.hbase.client.HTable.put(HTable.java:725)
> at
> org.apache.hadoop.hbase.coprocessor.TestRegionServerCoprocessorExceptionWithAbort.testExceptionFromCoprocessorDuringPut(TestRegionServerCoprocessorExceptionWithAbort.java:84)
> 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.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
> at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
> at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
> at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
> at
> org.junit.internal.runners.statements.FailOnTimeout$StatementThread.run(FailOnTimeout.java:62)
> {noformat}
> We have this exception because we entered a loop of retries.
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