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Date: Mon, 16 Apr 2012 21:46:20 +0000 (UTC)
From: "Lars Hofhansl (Updated) (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
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Subject: [jira] [Updated] (HBASE-5795) HServerLoad$RegionLoad breaks
 0.92<->0.94 compatibility
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     [ https://issues.apache.org/jira/browse/HBASE-5795?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Lars Hofhansl updated HBASE-5795:
---------------------------------

    Resolution: Fixed
        Status: Resolved  (was: Patch Available)

One down.
                
> HServerLoad$RegionLoad breaks 0.92<->0.94 compatibility
> -------------------------------------------------------
>
>                 Key: HBASE-5795
>                 URL: https://issues.apache.org/jira/browse/HBASE-5795
>             Project: HBase
>          Issue Type: Bug
>            Reporter: stack
>            Assignee: Zhihong Yu
>             Fix For: 0.94.0, 0.96.0
>
>         Attachments: 5795-v2.txt, 5795-v3.txt, 5795.unittest.txt
>
>
> This commit broke our 0.92/0.94 compatibility:
> {code}
> ------------------------------------------------------------------------
> r1136686 | stack | 2011-06-16 14:18:08 -0700 (Thu, 16 Jun 2011) | 1 line
> HBASE-3927 display total uncompressed byte size of a region in web UI
> {code}
> I just tried the new RC for 0.94.  I brought up a 0.94 master on a 0.92 cluster and rather than just digest version 1 of the HServerLoad, I get this:
> {code}
> 2012-04-14 22:47:59,752 WARN org.apache.hadoop.ipc.HBaseServer: Unable to read call parameters for client 10.4.14.38
> java.io.IOException: Error in readFields
>         at org.apache.hadoop.hbase.io.HbaseObjectWritable.readObject(HbaseObjectWritable.java:684)
>         at org.apache.hadoop.hbase.ipc.Invocation.readFields(Invocation.java:125)
>         at org.apache.hadoop.hbase.ipc.HBaseServer$Connection.processData(HBaseServer.java:1269)
>         at org.apache.hadoop.hbase.ipc.HBaseServer$Connection.readAndProcess(HBaseServer.java:1184)
>         at org.apache.hadoop.hbase.ipc.HBaseServer$Listener.doRead(HBaseServer.java:722)
>         at org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader.doRunLoop(HBaseServer.java:513)
>         at org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader.run(HBaseServer.java:488)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
>         at java.lang.Thread.run(Thread.java:662)
> Caused by: A record version mismatch occured. Expecting v2, found v1
>         at org.apache.hadoop.io.VersionedWritable.readFields(VersionedWritable.java:46)
>         at org.apache.hadoop.hbase.HServerLoad$RegionLoad.readFields(HServerLoad.java:379)
>         at org.apache.hadoop.hbase.HServerLoad.readFields(HServerLoad.java:686)
>         at org.apache.hadoop.hbase.io.HbaseObjectWritable.readObject(HbaseObjectWritable.java:681)
>         ... 9 more
> {code}

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