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https://issues.apache.org/jira/browse/MAPREDUCE-4367?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13400604#comment-13400604
 ] 

Jason Lowe commented on MAPREDUCE-4367:
---------------------------------------

If the history server isn't running or there are issues connecting to the 
history server, the kill command produces many retry messages.  For example:

{noformat}
$ mapred job -kill job_1340642510012_0003
2012-06-25 16:42:26,626 INFO  mapred.ClientServiceDelegate 
(ClientServiceDelegate.java:getProxy(254)) - Application state is completed. 
FinalApplicationStatus=FAILED. Redirecting to job history server
2012-06-25 16:42:27,629 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 0 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:42:28,630 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 1 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:42:29,631 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 2 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:42:30,632 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 3 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:42:31,633 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 4 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:42:32,633 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 5 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:42:33,634 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 6 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:42:34,635 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 7 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:42:35,636 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 8 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:42:36,637 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 9 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:42:36,642 INFO  mapred.ClientServiceDelegate 
(ClientServiceDelegate.java:getProxy(254)) - Application state is completed. 
FinalApplicationStatus=FAILED. Redirecting to job history server
2012-06-25 16:42:37,643 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 0 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:42:38,644 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 1 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:42:39,644 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 2 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:42:40,645 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 3 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:42:41,646 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 4 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:42:42,647 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 5 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:42:43,648 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 6 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:42:44,649 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 7 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:42:45,649 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 8 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:42:46,650 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 9 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:42:46,660 INFO  mapred.ResourceMgrDelegate 
(ResourceMgrDelegate.java:killApplication(329)) - Killing application 
application_1340642510012_0003
Killed job job_1340642510012_0003
{noformat}

It can eventually fail with a max retries exception in the case where the job 
is no longer running.  For example, here's what happens when trying to kill the 
same job again:

{noformat}
$ mapred job -kill job_1340642510012_0003
2012-06-25 16:42:57,268 INFO  mapred.ClientServiceDelegate 
(ClientServiceDelegate.java:getProxy(254)) - Application state is completed. 
FinalApplicationStatus=FAILED. Redirecting to job history server
2012-06-25 16:42:58,273 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 0 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:42:59,274 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 1 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:43:00,274 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 2 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:43:01,275 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 3 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:43:02,276 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 4 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:43:03,277 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 5 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:43:04,278 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 6 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:43:05,279 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 7 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:43:06,279 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 8 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:43:07,280 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 9 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:43:07,287 INFO  mapred.ClientServiceDelegate 
(ClientServiceDelegate.java:getProxy(254)) - Application state is completed. 
FinalApplicationStatus=FAILED. Redirecting to job history server
2012-06-25 16:43:08,288 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 0 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:43:09,289 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 1 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:43:10,289 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 2 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:43:11,290 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 3 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:43:12,291 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 4 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:43:13,292 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 5 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:43:14,293 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 6 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:43:15,294 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 7 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:43:16,294 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 8 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:43:17,295 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 9 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:43:17,300 INFO  mapred.ClientServiceDelegate 
(ClientServiceDelegate.java:getProxy(254)) - Application state is completed. 
FinalApplicationStatus=FAILED. Redirecting to job history server
2012-06-25 16:43:18,301 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 0 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:43:19,302 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 1 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:43:20,302 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 2 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:43:21,303 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 3 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:43:22,304 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 4 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:43:23,305 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 5 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:43:24,306 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 6 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:43:25,307 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 7 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:43:26,307 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 8 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2012-06-25 16:43:27,308 INFO  ipc.Client 
(Client.java:handleConnectionFailure(714)) - Retrying connect to server: 
xx:10020. Already tried 9 time(s); retry policy is 
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
Exception in thread "main" java.io.IOException
        at 
org.apache.hadoop.mapred.ClientServiceDelegate.invoke(ClientServiceDelegate.java:315)
        at 
org.apache.hadoop.mapred.ClientServiceDelegate.getJobStatus(ClientServiceDelegate.java:383)
        at org.apache.hadoop.mapred.YARNRunner.getJobStatus(YARNRunner.java:481)
        at org.apache.hadoop.mapreduce.Cluster.getJob(Cluster.java:184)
        at org.apache.hadoop.mapreduce.tools.CLI.run(CLI.java:280)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84)
        at org.apache.hadoop.mapred.JobClient.main(JobClient.java:1244)
{noformat}

                
> mapred job -kill tries to connect to history server
> ---------------------------------------------------
>
>                 Key: MAPREDUCE-4367
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4367
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: client, mrv2
>    Affects Versions: 0.23.3
>            Reporter: Jason Lowe
>            Priority: Minor
>
> The {{mapred job -kill}} command attempts to connect to the history server, 
> even though it is unrelated to the process of killing a job.

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