Liran Mendelovich created CURATOR-599:
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Summary: Hanging indefinitely on some scenarios since
zookeeper.request.timeout cannot be configured
Key: CURATOR-599
URL: https://issues.apache.org/jira/browse/CURATOR-599
Project: Apache Curator
Issue Type: Improvement
Components: Client
Affects Versions: 5.1.0
Reporter: Liran Mendelovich
On some executions where ZooKeeper server is not available, Curator client got
waiting and hanging indefinitely, with thread dump stack trace which can be seen
below.
As this is not reproduced consistently, it seems like a race condition from
Curator/ZooKeeper client, since zookeeper.request.timeout cannot be configured
in Curator client.
As a work-around solution, initialization is executed in a separate thread in
order to interrupt it if it hangs. This has been identified and handled here:
[join_while_zookeeper_down_issue|https://github.com/CiscoSE/commons-cluster/blob/main/docs/join_while_zookeeper_down_issue.txt]
The wanted solution is expose configuration to be able to configure
zookeeper.request.timeout, then it should wait until the request timeout, which
is treated at org.apache.zookeeper.ClientCnxn.submitRequest().
stacktrace size: 31
java.lang.Object.wait(Native Method)
java.lang.Object.wait(Object.java:502)
org.apache.zookeeper.ClientCnxn.submitRequest(ClientCnxn.java:1561)
org.apache.zookeeper.ClientCnxn.submitRequest(ClientCnxn.java:1533)
org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:1834)
org.apache.curator.framework.imps.CreateBuilderImpl$16.call(CreateBuilderImpl.java:1131)
org.apache.curator.framework.imps.CreateBuilderImpl$16.call(CreateBuilderImpl.java:1113)
org.apache.curator.RetryLoop.callWithRetry(RetryLoop.java:93)
org.apache.curator.framework.imps.CreateBuilderImpl.pathInForeground(CreateBuilderImpl.java:1110)
org.apache.curator.framework.imps.CreateBuilderImpl.protectedPathInForeground(CreateBuilderImpl.java:593)
org.apache.curator.framework.imps.CreateBuilderImpl.forPath(CreateBuilderImpl.java:583)
org.apache.curator.framework.imps.CreateBuilderImpl.forPath(CreateBuilderImpl.java:48)
org.apache.curator.x.discovery.details.ServiceDiscoveryImpl.internalRegisterService(ServiceDiscoveryImpl.java:237)
org.apache.curator.x.discovery.details.ServiceDiscoveryImpl.reRegisterServices(ServiceDiscoveryImpl.java:456)
org.apache.curator.x.discovery.details.ServiceDiscoveryImpl.start(ServiceDiscoveryImpl.java:135)
...
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