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https://issues.apache.org/jira/browse/HBASE-14274?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14705605#comment-14705605
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Andrew Purtell commented on HBASE-14274:
----------------------------------------
JMX cache buster came in on HBASE-14166
> Deadlock in region metrics on shutdown: MetricsRegionSourceImpl vs
> MetricsRegionAggregateSourceImpl
> ---------------------------------------------------------------------------------------------------
>
> Key: HBASE-14274
> URL: https://issues.apache.org/jira/browse/HBASE-14274
> Project: HBase
> Issue Type: Sub-task
> Components: test
> Reporter: stack
> Attachments: 23612.stack
>
>
> Looking into parent issue, got a hang locally of TestDistributedLogReplay.
> We have region closes here:
> {code}
> "RS_CLOSE_META-localhost:59610-0" prio=5 tid=0x00007ff65c03f800 nid=0x54347
> waiting on condition [0x000000011f7ac000]
> java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for <0x000000075636d8c0> (a
> java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync)
> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:867)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1197)
> at
> java.util.concurrent.locks.ReentrantReadWriteLock$WriteLock.lock(ReentrantReadWriteLock.java:945)
> at
> org.apache.hadoop.hbase.regionserver.MetricsRegionAggregateSourceImpl.deregister(MetricsRegionAggregateSourceImpl.java:78)
> at
> org.apache.hadoop.hbase.regionserver.MetricsRegionSourceImpl.close(MetricsRegionSourceImpl.java:120)
> at
> org.apache.hadoop.hbase.regionserver.MetricsRegion.close(MetricsRegion.java:41)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.doClose(HRegion.java:1500)
> at org.apache.hadoop.hbase.regionserver.HRegion.close(HRegion.java:1344)
> - locked <0x00000007ff878190> (a java.lang.Object)
> at
> org.apache.hadoop.hbase.regionserver.handler.CloseRegionHandler.process(CloseRegionHandler.java:102)
> at
> org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:103)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:744)
> {code}
> They are trying to MetricsRegionAggregateSourceImpl.deregister. They want to
> get a write lock on this classes local ReentrantReadWriteLock while holding
> MetricsRegionSourceImpl's readWriteLock write lock.
> Then, elsewhere the JmxCacheBuster is running trying to get metrics with
> above locks held in reverse:
> {code}
> "HBase-Metrics2-1" daemon prio=5 tid=0x00007ff65e14b000 nid=0x59a03 waiting
> on condition [0x0000000140ea5000]
> java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for <0x00000007cade1480> (a
> java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync)
> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireShared(AbstractQueuedSynchronizer.java:964)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireShared(AbstractQueuedSynchronizer.java:1282)
> at
> java.util.concurrent.locks.ReentrantReadWriteLock$ReadLock.lock(ReentrantReadWriteLock.java:731)
> at
> org.apache.hadoop.hbase.regionserver.MetricsRegionSourceImpl.snapshot(MetricsRegionSourceImpl.java:193)
> at
> org.apache.hadoop.hbase.regionserver.MetricsRegionAggregateSourceImpl.getMetrics(MetricsRegionAggregateSourceImpl.java:115)
> at
> org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.getMetrics(MetricsSourceAdapter.java:195)
> at
> org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.updateJmxCache(MetricsSourceAdapter.java:172)
> at
> org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.getMBeanInfo(MetricsSourceAdapter.java:151)
> at
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getNewMBeanClassName(DefaultMBeanServerInterceptor.java:333)
> at
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:319)
> at
> com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:522)
> at org.apache.hadoop.metrics2.util.MBeans.register(MBeans.java:57)
> at
> org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.startMBeans(MetricsSourceAdapter.java:221)
> - locked <0x00000007e654bdc0> (a
> org.apache.hadoop.metrics2.impl.MetricsSourceAdapter)
> at
> org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.start(MetricsSourceAdapter.java:96)
> at
> org.apache.hadoop.metrics2.impl.MetricsSystemImpl.registerSource(MetricsSystemImpl.java:245)
> - locked <0x0000000754302660> (a
> org.apache.hadoop.metrics2.impl.MetricsSystemImpl)
> at
> org.apache.hadoop.metrics2.impl.MetricsSystemImpl$1.postStart(MetricsSystemImpl.java:229)
> at sun.reflect.GeneratedMethodAccessor45.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:606)
> at
> org.apache.hadoop.metrics2.impl.MetricsSystemImpl$3.invoke(MetricsSystemImpl.java:290)
> at com.sun.proxy.$Proxy13.postStart(Unknown Source)
> at
> org.apache.hadoop.metrics2.impl.MetricsSystemImpl.start(MetricsSystemImpl.java:185)
> - locked <0x0000000754302660> (a
> org.apache.hadoop.metrics2.impl.MetricsSystemImpl)
> at
> org.apache.hadoop.metrics2.impl.JmxCacheBuster$JmxCacheBusterRunnable.run(JmxCacheBuster.java:81)
> {code}
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