Dan Smith created GEODE-540:
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Summary: Hang in OffHeapEvictionDUnitTest.testEachTaskSize
Key: GEODE-540
URL: https://issues.apache.org/jira/browse/GEODE-540
Project: Geode
Issue Type: Bug
Reporter: Dan Smith
I hit this hang in a private build of cfbeaf241d6c77ad47ba062bb4268c88b798ce90
I did a thread dump on the running processes, and it looks like it stuck in
OffHeapMemoryMonitor.stopMonitoring.
{noformat}
"Test worker" #10 prio=5 os_prio=0 tid=0x00007f8288dd1800 nid=0x7ba2 in
Object.wait() [0x00007f827206d000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
at java.lang.Thread.join(Thread.java:1245)
- locked <0x00000000d058f348> (a java.lang.Thread)
at java.lang.Thread.join(Thread.java:1319)
at
com.gemstone.gemfire.internal.cache.control.OffHeapMemoryMonitor.stopMonitoring(OffHeapMemoryMonitor.java:132)
- locked <0x00000000d058f1f8> (a
com.gemstone.gemfire.internal.cache.control.OffHeapMemoryMonitor)
at
com.gemstone.gemfire.internal.cache.OffHeapEvictionDUnitTest.createCache(OffHeapEvictionDUnitTest.java:81)
at
com.gemstone.gemfire.internal.cache.EvictionDUnitDisabledTest.testEachTaskSize(EvictionDUnitDisabledTest.java:192)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at junit.framework.TestCase.runTest(TestCase.java:176)
at junit.framework.TestCase.runBare(TestCase.java:141)
at junit.framework.TestResult$1.protect(TestResult.java:122)
at junit.framework.TestResult.runProtected(TestResult.java:142)
at junit.framework.TestResult.run(TestResult.java:125)
at junit.framework.TestCase.run(TestCase.java:129)
at junit.framework.TestSuite.runTest(TestSuite.java:252)
at junit.framework.TestSuite.run(TestSuite.java:247)
"Thread-199 OffHeapMemoryListener" #840 daemon prio=10 os_prio=0
tid=0x00007f8234977800 nid=0x27e7 waiting for monitor entry [0x00007f81fb4f9000]
java.lang.Thread.State: BLOCKED (on object monitor)
at
com.gemstone.gemfire.internal.cache.control.OffHeapMemoryMonitor.updateStateAndSendEvent(OffHeapMemoryMonitor.java:297)
- waiting to lock <0x00000000d058a7b0> (a
com.gemstone.gemfire.internal.cache.control.OffHeapMemoryMonitor)
at
com.gemstone.gemfire.internal.cache.control.OffHeapMemoryMonitor$OffHeapMemoryUsageListener.run(OffHeapMemoryMonitor.java:511)
at java.lang.Thread.run(Thread.java:745)
{noformat}
To me, it looks like the problem is that stopMonitoring calls join on the
memory monitor thread while synchronized. The memory monitor thread is then
stuck trying to get that lock.
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