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From "Alejandro Abdelnur (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-9845) Update protobuf to 2.5 from 2.4.x
Date Wed, 07 Aug 2013 15:40:47 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-9845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13732102#comment-13732102

Alejandro Abdelnur commented on HADOOP-9845:

the build is not failing because protoc 2.4.0 sends the version to sdterr while protoc 2.5.0
sends it to stdout. As with this patch we are requiring 2.5.0 I think we are good as I don't
expect protoc --version will swing back to stderr in future versions.
> Update protobuf to 2.5 from 2.4.x
> ---------------------------------
>                 Key: HADOOP-9845
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9845
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: performance
>    Affects Versions: 2.0.5-alpha
>            Reporter: stack
>            Assignee: Alejandro Abdelnur
>            Priority: Blocker
>             Fix For: 2.1.0-beta
>         Attachments: HADOOP-9845.patch, HADOOP-9845.patch
> protobuf 2.5 is a bit faster with a new Parse to avoid a builder step and a few other
goodies that we'd like to take advantage of over in hbase especially now we are all pb all
the time.  Unfortunately the protoc generated files are no longer compatible w/ 2.4.1 generated
files.  Hadoop uses 2.4.1 pb.  This latter fact makes it so we cannot upgrade until hadoop
> This issue suggests hadoop2 move to protobuf 2.5.
> I can do the patch no prob. if there is interest.
> (When we upgraded our build broke with complaints like the below:
> {code}
> java.lang.UnsupportedOperationException: This is supposed to be overridden by subclasses.
> 	at com.google.protobuf.GeneratedMessage.getUnknownFields(GeneratedMessage.java:180)
> 	at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$GetDatanodeReportRequestProto.getSerializedSize(ClientNamenodeProtocolProtos.java:21566)
> 	at com.google.protobuf.AbstractMessageLite.toByteString(AbstractMessageLite.java:49)
> 	at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.constructRpcRequest(ProtobufRpcEngine.java:149)
> 	at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:193)
> 	at com.sun.proxy.$Proxy14.getDatanodeReport(Unknown Source)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:164)
> 	at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:83)
> 	at com.sun.proxy.$Proxy14.getDatanodeReport(Unknown Source)
> 	at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getDatanodeReport(ClientNamenodeProtocolTranslatorPB.java:488)
> 	at org.apache.hadoop.hdfs.DFSClient.datanodeReport(DFSClient.java:1887)
> 	at org.apache.hadoop.hdfs.MiniDFSCluster.waitActive(MiniDFSCluster.java:1798
> ...
> {code}
> More over in HBASE-8165 if interested.

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