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https://issues.apache.org/jira/browse/MAPREDUCE-6355?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14527367#comment-14527367
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Jason Lowe commented on MAPREDUCE-6355:
---------------------------------------
Here's a snippet from a 2.5 client submitting a sleep job using 2.5 jars for
the job on a 2.6 cluster:
{noformat}
15/05/04 21:34:00 INFO mapreduce.Job: Running job: job_1429081185257_495794
15/05/04 21:34:13 WARN ipc.Client: Exception encountered while connecting to
the server :
org.apache.hadoop.ipc.RemoteException(javax.security.sasl.SaslException):
DIGEST-MD5: digest response format violation. Mismatched response.
15/05/04 21:34:13 WARN ipc.Client: Exception encountered while connecting to
the server :
org.apache.hadoop.ipc.RemoteException(javax.security.sasl.SaslException):
DIGEST-MD5: digest response format violation. Mismatched response.
15/05/04 21:34:14 WARN ipc.Client: Exception encountered while connecting to
the server :
org.apache.hadoop.ipc.RemoteException(javax.security.sasl.SaslException):
DIGEST-MD5: digest response format violation. Mismatched response.
15/05/04 21:34:14 WARN ipc.Client: Exception encountered while connecting to
the server :
org.apache.hadoop.ipc.RemoteException(javax.security.sasl.SaslException):
DIGEST-MD5: digest response format violation. Mismatched response.
[... many mismatched response errors removed for brevity ...]
15/05/04 21:34:39 INFO mapred.ClientServiceDelegate: Application state is
completed. FinalApplicationStatus=SUCCEEDED. Redirecting to job history server
15/05/04 21:34:39 INFO mapreduce.Job: Job job_1429081185257_495794 running in
uber mode : false
15/05/04 21:34:39 INFO mapreduce.Job: map 100% reduce 100%
15/05/04 21:34:39 INFO mapreduce.Job: Job job_1429081185257_495794 completed
successfully
15/05/04 21:34:39 INFO mapreduce.Job: Counters: 49
File System Counters
FILE: Number of bytes read=28
FILE: Number of bytes written=249357
[... and the rest of the job counters ...]
{noformat}
> 2.5 client cannot communicate with 2.5 job on 2.6 cluster
> ---------------------------------------------------------
>
> Key: MAPREDUCE-6355
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6355
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Affects Versions: 2.6.0
> Reporter: Jason Lowe
>
> Trying to run a job on a Hadoop 2.6 cluster from a Hadoop 2.5 client
> submitting a job that uses Hadoop 2.5 jars results in a job that succeeds but
> the client cannot communicate with the AM while the job is running.
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