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Posted to commits@pulsar.apache.org by GitBox <gi...@apache.org> on 2019/06/26 23:14:59 UTC
[GitHub] [pulsar] rdhabalia opened a new pull request #4616: [pulsar-broker]
fix deadlock on get-status rest-api call
rdhabalia opened a new pull request #4616: [pulsar-broker] fix deadlock on get-status rest-api call
URL: https://github.com/apache/pulsar/pull/4616
### Motivation
due to some issue if broker fails to complete topic-loading then getting stats of that topic blocks web-thread.
```
"pulsar-web-30-13" #242 prio=5 os_prio=0 tid=0x00002b0b3c001000 nid=0x2540 waiting on condition [0x00002b0aa7d0a000]
java.lang.Thread.State: WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x000000072560a180> (a java.util.concurrent.CompletableFuture$Signaller)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
at java.util.concurrent.CompletableFuture$Signaller.block(CompletableFuture.java:1693)
at java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3323)
at java.util.concurrent.CompletableFuture.waitingGet(CompletableFuture.java:1729)
at java.util.concurrent.CompletableFuture.join(CompletableFuture.java:1934)
at org.apache.pulsar.broker.admin.impl.PersistentTopicsBase.getTopicReference(PersistentTopicsBase.java:1253)
at org.apache.pulsar.broker.admin.impl.PersistentTopicsBase.internalGetStats(PersistentTopicsBase.java:592)
at org.apache.pulsar.broker.admin.v1.PersistentTopics.getStats(PersistentTopics.java:240)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
```
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