Eric Newton created ACCUMULO-1173:
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             Summary: NPE in tracer on zookeeper disconnect
                 Key: ACCUMULO-1173
                 URL: https://issues.apache.org/jira/browse/ACCUMULO-1173
             Project: Accumulo
          Issue Type: Bug
          Components: trace
    Affects Versions: 1.4.2
            Reporter: Eric Newton
            Assignee: Eric Newton
             Fix For: 1.5.0, 1.4.3


{noformat}
java.lang.IllegalArgumentException: Path cannot be null
	java.lang.IllegalArgumentException: Path cannot be null
		at org.apache.zookeeper.common.PathUtils.validatePath(PathUtils.java:45)
		at org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:1020)
		at org.apache.accumulo.fate.zookeeper.ZooReader.exists(ZooReader.java:75)
		at org.apache.accumulo.server.trace.TraceServer.process(TraceServer.java:274)
		at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:519)
		at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:495)
{noformat}


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