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From "Kai Zheng (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-6775) Fix MapReduce failures caused by default RPC engine changing
Date Wed, 07 Sep 2016 20:33:20 GMT
Kai Zheng created MAPREDUCE-6775:

             Summary: Fix MapReduce failures caused by default RPC engine changing
                 Key: MAPREDUCE-6775
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6775
             Project: Hadoop Map/Reduce
          Issue Type: Bug
    Affects Versions: 3.0.0-alpha2
            Reporter: Kai Zheng
            Assignee: Kai Zheng

HADOOP-13218 changed the default RPC engine, which isn't inappropriate because MAPREDUCE-6706
isn't solved yet, supporting TaskUmbilicalProtocol to use ProtobufRPCEngine.

[~jlowe] reported the following errors:
2016-09-07 17:51:56,296 WARN [main] org.apache.hadoop.mapred.YarnChild: Exception running
child : java.lang.reflect.UndeclaredThrowableException
	at com.sun.proxy.$Proxy10.getTask(Unknown Source)
	at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:137)
Caused by: com.google.protobuf.ServiceException: Too many or few parameters for request. Method:
[getTask], Expected: 2, Actual: 1
	at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:199)
	at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:116)
	... 2 more

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