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https://issues.apache.org/jira/browse/HADOOP-7524?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13089984#comment-13089984
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Todd Lipcon commented on HADOOP-7524:
-------------------------------------
I tried running HDFS trunk when this patch is applied to common, and it fails
with the following:
java.io.IOException: Unknown protocol to name node:
org.apache.hadoop.hdfs.server.protocol.NamenodeProtocols
at
org.apache.hadoop.hdfs.server.namenode.NameNode.getProtocolVersion(NameNode.java:196)
at
org.apache.hadoop.ipc.WritableRpcEngine$Server.registerProtocolAndImpl(WritableRpcEngine.java:387)
at
org.apache.hadoop.ipc.WritableRpcEngine$Server.<init>(WritableRpcEngine.java:544)
at
org.apache.hadoop.ipc.WritableRpcEngine.getServer(WritableRpcEngine.java:329)
at org.apache.hadoop.ipc.RPC.getServer(RPC.java:565)
at
org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:431)
so I think we need a corresponding patch for HDFS and MR, or we need a
workaround on the Common side.
> Change RPC to allow multiple protocols including multuple versions of the
> same protocol
> ---------------------------------------------------------------------------------------
>
> Key: HADOOP-7524
> URL: https://issues.apache.org/jira/browse/HADOOP-7524
> Project: Hadoop Common
> Issue Type: Improvement
> Components: ipc
> Reporter: Sanjay Radia
> Assignee: Sanjay Radia
> Attachments: newPatchFindbugsWarnings.html, nits.txt, rpc2.patch,
> rpc2_trunk.patch, rpc3.patch, rpc4.txt
>
>
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