poorbarcode opened a new pull request, #20189:
URL: https://github.com/apache/pulsar/pull/20189
### Motivation
In the method `loadOrCreatePersistentTopic,` it does `getBundles` after
`LockManagerImpl.lambda$acquireLock`. This all runs on the thread
`main-EventThread.` It will cause deadlock
```
"main-EventThread" #21 daemon prio=5 os_prio=0 cpu=1025.43ms
elapsed=1113.10s tid=0x00007fb2b6514bf0 nid=0xd6 waiting on condition
[0x00007fb2785dc000]
java.lang.Thread.State: WAITING (parking)
at jdk.internal.misc.Unsafe.park([email protected]/Native Method)
- parking to wait for <0x0000000487fda1a8> (a
java.util.concurrent.CompletableFuture$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$LoadingCacheView.get(LocalAsyncLoadingCache.java:122)
at
org.apache.pulsar.common.naming.NamespaceBundleFactory.getBundles(NamespaceBundleFactory.java:260)
at
org.apache.pulsar.broker.namespace.NamespaceService.getBundle(NamespaceService.java:219)
at
org.apache.pulsar.broker.namespace.NamespaceService.isServiceUnitActiveAsync(NamespaceService.java:1020)
at
org.apache.pulsar.broker.service.BrokerService.checkOwnershipAndCreatePersistentTopic(BrokerService.java:1423)
at
org.apache.pulsar.broker.service.BrokerService.lambda$loadOrCreatePersistentTopic$53(BrokerService.java:1398)
at
org.apache.pulsar.broker.service.BrokerService$$Lambda$1265/0x000000080141f980.run(Unknown
Source)
at
java.util.concurrent.CompletableFuture$UniRun.tryFire([email protected]/CompletableFuture.java:787)
at
java.util.concurrent.CompletableFuture.postComplete([email protected]/CompletableFuture.java:510)
at
java.util.concurrent.CompletableFuture.complete([email protected]/CompletableFuture.java:2147)
at
org.apache.pulsar.metadata.coordination.impl.LockManagerImpl.lambda$acquireLock$1(LockManagerImpl.java:105)
at
org.apache.pulsar.metadata.coordination.impl.LockManagerImpl$$Lambda$604/0x00000008012086b8.run(Unknown
Source)
at
java.util.concurrent.CompletableFuture$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.metadata.coordination.impl.ResourceLockImpl.lambda$acquire$2(ResourceLockImpl.java:128)
at
org.apache.pulsar.metadata.coordination.impl.ResourceLockImpl$$Lambda$602/0x0000000801208248.run(Unknown
Source)
at
java.util.concurrent.CompletableFuture$UniRun.tryFire([email protected]/CompletableFuture.java:787)
at
java.util.concurrent.CompletableFuture.postComplete([email protected]/CompletableFuture.java:510)
at
java.util.concurrent.CompletableFuture.complete([email protected]/CompletableFuture.java:2147)
at
org.apache.pulsar.metadata.coordination.impl.ResourceLockImpl.lambda$acquireWithNoRevalidation$6(ResourceLockImpl.java:167)
at
org.apache.pulsar.metadata.coordination.impl.ResourceLockImpl$$Lambda$600/0x0000000801203400.accept(Unknown
Source)
at
java.util.concurrent.CompletableFuture$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.handlePutResult(ZKMetadataStore.java:225)
at
org.apache.pulsar.metadata.impl.ZKMetadataStore.lambda$batchOperation$7(ZKMetadataStore.java:182)
at
org.apache.pulsar.metadata.impl.ZKMetadataStore$$Lambda$224/0x0000000800ee9d20.processResult(Unknown
Source)
at
org.apache.pulsar.metadata.impl.PulsarZooKeeperClient$3$1.processResult(PulsarZooKeeperClient.java:490)
at
org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:722)
at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:563)
```
### Modifications
After the operations of `store`, switch to another thread.
### Documentation
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- [ ] `doc` <!-- Your PR contains doc changes. -->
- [x] `doc-required` <!-- Your PR changes impact docs and you will update
later -->
- [ ] `doc-not-needed` <!-- Your PR changes do not impact docs -->
- [ ] `doc-complete` <!-- Docs have been already added -->
### Matching PR in forked repository
PR in forked repository:
- 1
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