J.P Feng created HIVE-18303:
-------------------------------

             Summary: ZooKeeperHiveLockManager should close after lock release 
in releaseLocksAndCommitOrRollback
                 Key: HIVE-18303
                 URL: https://issues.apache.org/jira/browse/HIVE-18303
             Project: Hive
          Issue Type: Bug
          Components: Hive
    Affects Versions: 2.2.0, 2.1.1
         Environment: hive2.1.1, jdk 1.7, centos
            Reporter: J.P Feng


i found exception :

ZooKeeperHiveLockManager: Failed to release ZooKeeper lock: 
java.lang.IllegalStateException: instance must be started before calling this 
method

because in ShutdownHookManager, priority of 
CuratorFrameworkSingleton.closeAndReleaseInstance is 10, but in 
Driver.releaseLocksAndCommitOrRollback, it's 0. So locks are released after 
CuratorFramework is closed, which may case such exception.

This is my operation:

I add hook of ExecuteWithHookContext or PreExecute, which simply sleep like:
    @Override
    public void run(HookContext hookContext) throws Exception {

        int max_i = 6;

        try {
            for ( int i = 0; i < max_i ; i ++) {
                LOG.info("try to sleep, for i is => " + i);
                Thread.sleep(5000);
            }

        } catch (Exception e) {
            LOG.error(e.getMessage(), e);
        }

    }

and run sql for example, 
select count(1) from hive_test.time_test;

Then enter ctrl+c twice to kill hive client. Hive client will not exit, and the 
above error is thrown.





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