public void closeSession(SessionHandle sessionHandle) throws HiveSQLException {
HiveSession session = handleToSession.remove(sessionHandle);
if (session == null) {
throw new HiveSQLException("Session does not exist!");
}
session.close();
// Shutdown HiveServer2 if it has been deregistered from ZooKeeper and has no active sessions
if (!(hiveServer2 == null)
&& (hiveConf.getBoolVar(ConfVars.HIVE_SERVER2_SUPPORT_DYNAMIC_SERVICE_DISCOVERY))
&& (!hiveServer2.isRegisteredWithZooKeeper())) {
// Asynchronously shutdown this instance of HiveServer2,
// if there are no active client sessions
if (getOpenSessionCount() == 0) {
LOG.info(
"This instance of HiveServer2 has been removed from the list of server "
+ "instances available for dynamic service discovery. "
+ "The last client session has ended - will shutdown now.");
Thread shutdownThread =
new Thread() {
@Override
public void run() {
hiveServer2.stop();
}
};
shutdownThread.start();
}
}
}
