Package org.apache.drill.yarn.client

Class StopCommand

java.lang.Object

org.apache.drill.yarn.client.ClientCommand

org.apache.drill.yarn.client.StopCommand

public class StopCommand
extends ClientCommand

Perform a semi-graceful shutdown of the Drill-on-YARN AM. We send a message to the AM to request shutdown because the YARN-provided message just kills the AM. (There seems to be no way to get YARN to call its own AMRMClientAsync.CallbackHandler.onShutdownRequest message.) The AM, however, cannot gracefully shut down the drill-bits because Drill itself has no graceful shutdown. But, at least this technique gives the AM a fighting chance to do graceful shutdown in the future.

Field Summary

Fields inherited from class org.apache.drill.yarn.client.ClientCommand

opts

Constructor Summary

Constructors

Constructor	Description
StopCommand()

Method Summary

Modifier and Type	Method	Description
void	run()

Methods inherited from class org.apache.drill.yarn.client.ClientCommand

checkAppId, getAppIdFile, getClient, loadAppId, removeAppIdFile, setOpts

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

StopCommand

public StopCommand()

Method Details

run

public void run()
         throws ClientException

Specified by:

run in class ClientCommand

Throws:

ClientException