[MAPREDUCE-6775] Fix MapReduce failures caused by default RPC engine changing

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Invalid
• Affects Version/s: 3.0.0-alpha2
• Target Version/s: 3.0.0-alpha2
• Assignee: Kai Zheng
• Reporter: Kai Zheng
• Created: 07/Sep/16 20:32
• Updated: 07/Sep/16 21:56
• Resolved: 07/Sep/16 21:56

Description

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

Issue Links

• is part of: HADOOP-12579 Deprecate WriteableRPCEngine
• is related to: HADOOP-13218 Migrate other Hadoop side tests to prepare for removing WritableRPCEngine