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From "zhaogang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CURATOR-165) LeaderLatch.checkLeadership(LeaderLatch.java:478) will throw a exception, then no leader will be elected.
Date Wed, 12 Nov 2014 08:16:33 GMT
zhaogang created CURATOR-165:
--------------------------------

             Summary: LeaderLatch.checkLeadership(LeaderLatch.java:478) will throw a exception,
then no leader will be elected.
                 Key: CURATOR-165
                 URL: https://issues.apache.org/jira/browse/CURATOR-165
             Project: Apache Curator
          Issue Type: Bug
          Components: Recipes
    Affects Versions: 2.5.0
            Reporter: zhaogang
            Priority: Critical


We use curator for leader election within our 2 clients, sometimes none of the 2 clients was
a leader.
We checked the log and found this caused by a exception which was being throwed in method
LeaderLatch.checkLeadership(), after throwing this exception the curator won't do the leader
election. Here is error log:


ERROR org.apache.curator.framework.imps.CuratorFrameworkImpl - Background exception was not
retry-able or retry gave up
INFO   | jvm 1    | 2014/11/12 00:36:52 | java.lang.IllegalArgumentException: Path must start
with / character
INFO   | jvm 1    | 2014/11/12 00:36:52 | 	at org.apache.curator.utils.PathUtils.validatePath(PathUtils.java:53)
INFO   | jvm 1    | 2014/11/12 00:36:52 | 	at org.apache.curator.utils.ZKPaths.getNodeFromPath(ZKPaths.java:56)
INFO   | jvm 1    | 2014/11/12 00:36:52 | 	at org.apache.curator.framework.recipes.leader.LeaderLatch.checkLeadership(LeaderLatch.java:478)
INFO   | jvm 1    | 2014/11/12 00:36:52 | 	at org.apache.curator.framework.recipes.leader.LeaderLatch.access$500(LeaderLatch.java:60)
INFO   | jvm 1    | 2014/11/12 00:36:52 | 	at org.apache.curator.framework.recipes.leader.LeaderLatch$6.processResult(LeaderLatch.java:536)
INFO   | jvm 1    | 2014/11/12 00:36:52 | 	at org.apache.curator.framework.imps.CuratorFrameworkImpl.sendToBackgroundCallback(CuratorFrameworkImpl.java:730)
INFO   | jvm 1    | 2014/11/12 00:36:52 | 	at org.apache.curator.framework.imps.CuratorFrameworkImpl.processBackgroundOperation(CuratorFrameworkImpl.java:516)
INFO   | jvm 1    | 2014/11/12 00:36:52 | 	at org.apache.curator.framework.imps.GetChildrenBuilderImpl$2.processResult(GetChildrenBuilderImpl.java:166)
INFO   | jvm 1    | 2014/11/12 00:36:52 | 	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:590)
INFO   | jvm 1    | 2014/11/12 00:36:52 | 	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:498)



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