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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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)