lhotari commented on issue #13092:
URL: https://github.com/apache/pulsar/issues/13092#issuecomment-984633770
I it seems to be a leak in the "mutex" lock / unlock in MockZooKeeper
the thread dump contains this type of stacks too:
```
"metadata-store-2857-1" #4674 prio=5 os_prio=0 cpu=17.87ms elapsed=2969.28s
tid=0x00007f2ac238b800 nid=0x5935 waiting on condition [0x00007f2a69fe1000]
java.lang.Thread.State: WAITING (parking)
at jdk.internal.misc.Unsafe.park([email protected]/Native Method)
- parking to wait for <0x00000000c592e390> (a
java.util.concurrent.locks.ReentrantLock$NonfairSync)
at
java.util.concurrent.locks.LockSupport.park([email protected]/LockSupport.java:194)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt([email protected]/AbstractQueuedSynchronizer.java:885)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued([email protected]/AbstractQueuedSynchronizer.java:917)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire([email protected]/AbstractQueuedSynchronizer.java:1240)
at
java.util.concurrent.locks.ReentrantLock.lock([email protected]/ReentrantLock.java:267)
at org.apache.zookeeper.MockZooKeeper.delete(MockZooKeeper.java:825)
at org.apache.zookeeper.MockZooKeeper.multi(MockZooKeeper.java:957)
at org.apache.zookeeper.MockZooKeeper.multi(MockZooKeeper.java:936)
at
org.apache.pulsar.metadata.impl.ZKMetadataStore.batchOperation(ZKMetadataStore.java:148)
at
org.apache.pulsar.metadata.impl.batching.AbstractBatchedMetadataStore.flush(AbstractBatchedMetadataStore.java:111)
at
org.apache.pulsar.metadata.impl.batching.AbstractBatchedMetadataStore$$Lambda$214/0x00000001003de440.run(Unknown
Source)
at
java.util.concurrent.Executors$RunnableAdapter.call([email protected]/Executors.java:515)
at
java.util.concurrent.FutureTask.runAndReset([email protected]/FutureTask.java:305)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run([email protected]/ScheduledThreadPoolExecutor.java:305)
at
java.util.concurrent.ThreadPoolExecutor.runWorker([email protected]/ThreadPoolExecutor.java:1128)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run([email protected]/ThreadPoolExecutor.java:628)
at
io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.lang.Thread.run([email protected]/Thread.java:829)
Locked ownable synchronizers:
- <0x00000000c57f9248> (a
java.util.concurrent.ThreadPoolExecutor$Worker)
"metadata-store-zk-session-watcher-2858-1" #4675 prio=5 os_prio=0 cpu=0.15ms
elapsed=2969.28s tid=0x00007f2ac2254800 nid=0x5936 waiting on condition
[0x00007f2a5eae8000]
java.lang.Thread.State: WAITING (parking)
at jdk.internal.misc.Unsafe.park([email protected]/Native Method)
- parking to wait for <0x00000000c592e390> (a
java.util.concurrent.locks.ReentrantLock$NonfairSync)
at
java.util.concurrent.locks.LockSupport.park([email protected]/LockSupport.java:194)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt([email protected]/AbstractQueuedSynchronizer.java:885)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued([email protected]/AbstractQueuedSynchronizer.java:917)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire([email protected]/AbstractQueuedSynchronizer.java:1240)
at
java.util.concurrent.locks.ReentrantLock.lock([email protected]/ReentrantLock.java:267)
at
org.apache.zookeeper.MockZooKeeper.lambda$exists$15(MockZooKeeper.java:644)
at
org.apache.zookeeper.MockZooKeeper$$Lambda$325/0x0000000100500040.run(Unknown
Source)
at
com.google.common.util.concurrent.MoreExecutors$DirectExecutorService.execute(MoreExecutors.java:321)
at org.apache.zookeeper.MockZooKeeper.exists(MockZooKeeper.java:643)
at
org.apache.pulsar.metadata.impl.ZKSessionWatcher.checkConnectionStatus(ZKSessionWatcher.java:89)
- locked <0x00000000c592e450> (a
org.apache.pulsar.metadata.impl.ZKSessionWatcher)
at
org.apache.pulsar.metadata.impl.ZKSessionWatcher$$Lambda$216/0x00000001003ddc40.run(Unknown
Source)
at
org.apache.pulsar.common.util.Runnables$CatchingAndLoggingRunnable.run(Runnables.java:53)
at
java.util.concurrent.Executors$RunnableAdapter.call([email protected]/Executors.java:515)
at
java.util.concurrent.FutureTask.runAndReset([email protected]/FutureTask.java:305)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run([email protected]/ScheduledThreadPoolExecutor.java:305)
at
java.util.concurrent.ThreadPoolExecutor.runWorker([email protected]/ThreadPoolExecutor.java:1128)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run([email protected]/ThreadPoolExecutor.java:628)
at
io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.lang.Thread.run([email protected]/Thread.java:829)
```
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