[jira] [Created] (HIVE-6755) Zookeeper Lock Manager leaks zookeeper connections.

[Andrey Stepachev (JIRA)]

Andrey Stepachev created HIVE-6755:
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             Summary: Zookeeper Lock Manager leaks zookeeper connections.
                 Key: HIVE-6755
                 URL: https://issues.apache.org/jira/browse/HIVE-6755
             Project: Hive
          Issue Type: Bug
          Components: HiveServer2
    Affects Versions: 0.12.0
         Environment: cloudera cdh5b2
            Reporter: Andrey Stepachev
            Priority: Critical


Code below in case of any errors in zooKeeper.create statement leaves unclosed 
zookeeper instance.
Thats lead to connection exhausting on zookeeper over time.

{code:title=ZooKeeperHiveLockManager.java|borderStyle=solid}
    try {
      renewZookeeperInstance(sessionTimeout, quorumServers);
      parent = conf.getVar(HiveConf.ConfVars.HIVE_ZOOKEEPER_NAMESPACE);

      try {
        zooKeeper.create("/" +  parent, new byte[0], Ids.OPEN_ACL_UNSAFE, 
CreateMode.PERSISTENT);
      } catch (KeeperException e) {
        // ignore if the parent already exists
        if (e.code() != KeeperException.Code.NODEEXISTS) {
          LOG.warn("Unexpected ZK exception when creating parent node /" + 
parent, e);
        }
      }

    } catch (Exception e) {
      LOG.error("Failed to create ZooKeeper object: ", e);
      throw new 
LockException(ErrorMsg.ZOOKEEPER_CLIENT_COULD_NOT_BE_INITIALIZED.getMsg());
}
{code}



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