poorbarcode commented on issue #20738:
URL: https://github.com/apache/pulsar/issues/20738#issuecomment-1666800205

   I think this issue was fixed by https://github.com/apache/pulsar/pull/20189
   
   You can see there has a thread that hits the deadlock issue(it is the same 
as the issue that https://github.com/apache/pulsar/pull/20189 solved):
   
   ```
   "main-EventThread" #20 daemon prio=5 os_prio=0 cpu=337912.60ms 
elapsed=431398.16s tid=0x00007f3d4e1f0fc0 nid=0xd2 waiting on condition  
[0x00007f3d1d6fd000]
      java.lang.Thread.State: WAITING (parking)
        at jdk.internal.misc.Unsafe.park([email protected]/Native Method)
        - parking to wait for  <0x000000071b786a00> (a 
java.util.concurrent.CompletableFuture$Signaller)
        at 
java.util.concurrent.locks.LockSupport.park([email protected]/LockSupport.java:211)
        at 
java.util.concurrent.CompletableFuture$Signaller.block([email protected]/CompletableFuture.java:1864)
        at 
java.util.concurrent.ForkJoinPool.unmanagedBlock([email protected]/ForkJoinPool.java:3463)
        at 
java.util.concurrent.ForkJoinPool.managedBlock([email protected]/ForkJoinPool.java:3434)
        at 
java.util.concurrent.CompletableFuture.waitingGet([email protected]/CompletableFuture.java:1898)
        at 
java.util.concurrent.CompletableFuture.get([email protected]/CompletableFuture.java:2072)
        at 
com.github.benmanes.caffeine.cache.LocalAsyncCache$AbstractCacheView.resolve(LocalAsyncCache.java:515)
        at 
com.github.benmanes.caffeine.cache.LocalAsyncLoadingCache$LoadingCacheView.get(LocalAsyncLoadingCache.java:122)
        at 
org.apache.pulsar.common.naming.NamespaceBundleFactory.getBundles(NamespaceBundleFactory.java:261)
        at 
org.apache.pulsar.broker.namespace.NamespaceService.getBundle(NamespaceService.java:222)
        at 
org.apache.pulsar.broker.namespace.NamespaceService.isServiceUnitActiveAsync(NamespaceService.java:1026)
        at 
org.apache.pulsar.broker.service.BrokerService.checkOwnershipAndCreatePersistentTopic(BrokerService.java:1454)
        at 
org.apache.pulsar.broker.service.BrokerService.lambda$loadOrCreatePersistentTopic$46(BrokerService.java:1429)
        at 
org.apache.pulsar.broker.service.BrokerService$$Lambda$734/0x00000008012c6628.run(Unknown
 Source)
        at 
java.util.concurrent.CompletableFuture$UniRun.tryFire([email protected]/CompletableFuture.java:787)
        at 
java.util.concurrent.CompletableFuture.postComplete([email protected]/CompletableFuture.java:510)
        at 
java.util.concurrent.CompletableFuture.complete([email protected]/CompletableFuture.java:2147)
        at 
org.apache.pulsar.common.naming.NamespaceBundleFactory.lambda$doLoadBundles$2(NamespaceBundleFactory.java:110)
        at 
org.apache.pulsar.common.naming.NamespaceBundleFactory$$Lambda$515/0x000000080110ac48.accept(Unknown
 Source)
        at 
java.util.concurrent.CompletableFuture$UniAccept.tryFire([email protected]/CompletableFuture.java:718)
        at 
java.util.concurrent.CompletableFuture.postComplete([email protected]/CompletableFuture.java:510)
        at 
java.util.concurrent.CompletableFuture.complete([email protected]/CompletableFuture.java:2147)
        at 
org.apache.pulsar.metadata.impl.ZKMetadataStore.handleGetResult(ZKMetadataStore.java:253)
        at 
org.apache.pulsar.metadata.impl.ZKMetadataStore.lambda$batchOperation$7(ZKMetadataStore.java:197)
        at 
org.apache.pulsar.metadata.impl.ZKMetadataStore$$Lambda$169/0x0000000800ebc238.processResult(Unknown
 Source)
        at 
org.apache.pulsar.metadata.impl.PulsarZooKeeperClient$3$1.processResult(PulsarZooKeeperClient.java:489)
        at 
org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:712)
        at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:553)
   ```


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