nodece opened a new pull request, #23832:
URL: https://github.com/apache/pulsar/pull/23832
### Motivation
The `metadata-store` thread is blocked in the Pulsar 3.0.x:
```
"metadata-store-11-1" #18 prio=5 os_prio=0 cpu=191.70ms elapsed=92.64s
tid=0x00007fe149887e80 nid=0x3f39b waiting on condition [0x00007fdedd3fd000]
java.lang.Thread.State: TIMED_WAITING (parking)
at jdk.internal.misc.Unsafe.park([email protected]/Native Method)
- parking to wait for <0x00001000270a2020> (a
java.util.concurrent.CompletableFuture$Signaller)
at
java.util.concurrent.locks.LockSupport.parkNanos([email protected]/LockSupport.java:252)
at
java.util.concurrent.CompletableFuture$Signaller.block([email protected]/CompletableFuture.java:1866)
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.timedGet([email protected]/CompletableFuture.java:1939)
at
java.util.concurrent.CompletableFuture.get([email protected]/CompletableFuture.java:2095)
at
org.apache.pulsar.broker.resources.BaseResources.exists(BaseResources.java:183)
at
org.apache.pulsar.broker.resources.NamespaceResources$PartitionedTopicResources.partitionedTopicExists(NamespaceResources.java:302)
at
org.apache.pulsar.broker.admin.impl.PersistentTopicsBase.lambda$internalGetPartitionedStats$173(PersistentTopicsBase.java:1579)
at
org.apache.pulsar.broker.admin.impl.PersistentTopicsBase$$Lambda$687/0x0000000801261160.apply(Unknown
Source)
at
java.util.concurrent.CompletableFuture.uniHandle([email protected]/CompletableFuture.java:934)
at
java.util.concurrent.CompletableFuture.uniHandleStage([email protected]/CompletableFuture.java:950)
at
java.util.concurrent.CompletableFuture.handle([email protected]/CompletableFuture.java:2340)
at
org.apache.pulsar.broker.admin.impl.PersistentTopicsBase.lambda$internalGetPartitionedStats$174(PersistentTopicsBase.java:1560)
at
org.apache.pulsar.broker.admin.impl.PersistentTopicsBase$$Lambda$674/0x00000008012561a0.accept(Unknown
Source)
```
### Modifications
Remove blocking calls.
### Documentation
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- [ ] `doc` <!-- Your PR contains doc changes. -->
- [ ] `doc-required` <!-- Your PR changes impact docs and you will update
later -->
- [x] `doc-not-needed` <!-- Your PR changes do not impact docs -->
- [ ] `doc-complete` <!-- Docs have been already added -->
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