Keith Turner created CURATOR-467:
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Summary: Avoid logging errors after curator framework is closed.
Key: CURATOR-467
URL: https://issues.apache.org/jira/browse/CURATOR-467
Project: Apache Curator
Issue Type: Improvement
Reporter: Keith Turner
Assignee: Jordan Zimmerman
When the following operations are performed in rapid succession, it can lead
annoying errors being logged.
* Create curator framework
* Create leader latch
* Start leader latch
* Stop leader latch
* Close leader latch
* Close curator framework
The errors happen because background processing queued by the leader latch is
still in flight when the curator framework is closed. When these background
ops try to access the closed curator framework the following exception happens.
It would be nice if the messages were logged at debug after close.
{noformat}
2018-06-01 17:35:52,095 [imps.CuratorFrameworkImpl] ERROR: Background exception
was not retry-able or retry gave up
java.lang.IllegalStateException: instance must be started before calling this
method
at
org.apache.curator.shaded.com.google.common.base.Preconditions.checkState(Preconditions.java:176)
at
org.apache.curator.framework.imps.CuratorFrameworkImpl.delete(CuratorFrameworkImpl.java:359)
at
org.apache.curator.framework.recipes.leader.LeaderLatch.setNode(LeaderLatch.java:666)
at
org.apache.curator.framework.recipes.leader.LeaderLatch.access$300(LeaderLatch.java:64)
at
org.apache.curator.framework.recipes.leader.LeaderLatch$4.processResult(LeaderLatch.java:492)
at
org.apache.curator.framework.imps.CuratorFrameworkImpl.sendToBackgroundCallback(CuratorFrameworkImpl.java:749)
at
org.apache.curator.framework.imps.CuratorFrameworkImpl.processBackgroundOperation(CuratorFrameworkImpl.java:522)
at
org.apache.curator.framework.imps.CreateBuilderImpl.sendBackgroundResponse(CreateBuilderImpl.java:584)
at
org.apache.curator.framework.imps.CreateBuilderImpl.access$900(CreateBuilderImpl.java:44)
at
org.apache.curator.framework.imps.CreateBuilderImpl$6.processResult(CreateBuilderImpl.java:534)
at
org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:607)
at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:505)
{noformat}
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