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https://issues.apache.org/jira/browse/MAPREDUCE-7430?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18034279#comment-18034279
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ASF GitHub Bot commented on MAPREDUCE-7430:
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github-actions[bot] closed pull request #5255: MAPREDUCE-7430 FileSystemCount
enumeration changes will cause mapreduce application failure during upgrade
URL: https://github.com/apache/hadoop/pull/5255
> FileSystemCount enumeration changes will cause mapreduce application failure
> during upgrade
> -------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-7430
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-7430
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Reporter: Daniel Ma
> Assignee: Daniel Ma
> Priority: Major
> Labels: pull-request-available
> Attachments: screenshot-1.png, screenshot-2.png
>
>
> We found this issue when doing rollingUpgrade in our production setup.
> A new mapreduce counter is introduced in the patch: HADOOP-15507. Add
> MapReduce counters about EC bytes read.
> !screenshot-1.png!
> In upgrade scenario, if the user with old version mapreduce client try to run
> a job on yarn cluster with new version, the below exception will be thrown in
> container log:
> {code:java}
> 2022-12-21 21:38:37,037 | INFO | IPC Server handler 28 on 27102 | Commit
> go/no-go request from attempt_1670928986900_1250_r_000000_0 |
> TaskAttemptListenerImpl.java:222
> 2022-12-21 21:38:37,037 | INFO | IPC Server handler 28 on 27102 | Result of
> canCommit for attempt_1670928986900_1250_r_000000_0:true | TaskImpl.java:592
> 2022-12-21 21:38:37,037 | WARN | Socket Reader #2 for port 27102 | Unable to
> read call parameters for client 192.168.4.96on connection protocol
> org.apache.hadoop.mapred.TaskUmbilicalProtocol for rpcKind RPC_WRITABLE |
> Server.java:2598
> java.lang.ArrayIndexOutOfBoundsException: 5
> at
> org.apache.hadoop.mapreduce.counters.FileSystemCounterGroup.readFields(FileSystemCounterGroup.java:304)
> at org.apache.hadoop.mapred.Counters$Group.readFields(Counters.java:324)
> at
> org.apache.hadoop.mapreduce.counters.AbstractCounters.readFields(AbstractCounters.java:307)
> at org.apache.hadoop.mapred.TaskStatus.readFields(TaskStatus.java:489)
> at
> org.apache.hadoop.mapred.ReduceTaskStatus.readFields(ReduceTaskStatus.java:140)
> at
> org.apache.hadoop.io.ObjectWritable.readObject(ObjectWritable.java:285)
> at
> org.apache.hadoop.ipc.WritableRpcEngine$Invocation.readFields(WritableRpcEngine.java:162)
> at
> org.apache.hadoop.ipc.RpcWritable$WritableWrapper.readFrom(RpcWritable.java:85)
> at
> org.apache.hadoop.ipc.RpcWritable$Buffer.getValue(RpcWritable.java:187)
> at
> org.apache.hadoop.ipc.RpcWritable$Buffer.newInstance(RpcWritable.java:183)
> at
> org.apache.hadoop.ipc.Server$Connection.processRpcRequest(Server.java:2594)
> at
> org.apache.hadoop.ipc.Server$Connection.processOneRpc(Server.java:2515)
> at
> org.apache.hadoop.ipc.Server$Connection.unwrapPacketAndProcessRpcs(Server.java:2469)
> at
> org.apache.hadoop.ipc.Server$Connection.saslReadAndProcess(Server.java:1912)
> at
> org.apache.hadoop.ipc.Server$Connection.processRpcOutOfBandRequest(Server.java:2723)
> at
> org.apache.hadoop.ipc.Server$Connection.processOneRpc(Server.java:2509)
> at
> org.apache.hadoop.ipc.Server$Connection.readAndProcess(Server.java:2258)
> at org.apache.hadoop.ipc.Server$Listener.doRead(Server.java:1395)
> at
> org.apache.hadoop.ipc.Server$Listener$Reader.doRunLoop(Server.java:1251)
> at org.apache.hadoop.ipc.Server$Listener$Reader.run(Server.java:1222)
> {code}
> just ignore the line number which is not completely consistent with trunk,
> but it is easy to understand.
> So a extra validate is needed in readFields() t5 avoid the array element to
> be read is out of range.
> !screenshot-2.png!
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