[pulsar-broker] fix deadlock on get-status rest-api call #4616
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rerun java8 tests |
sijie
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Jun 29, 2019
jiazhai
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### 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) ``` (cherry picked from commit f272df9)
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Motivation
due to some issue if broker fails to complete topic-loading then getting stats of that topic blocks web-thread.