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https://issues.apache.org/jira/browse/HBASE-4301?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13096277#comment-13096277
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Ted Yu commented on HBASE-4301:
-------------------------------

The only exception I saw was:
{code}
2011-09-02 20:53:45,587 WARN org.apache.hadoop.hbase.master.HMaster: Failed 
getting all descriptors
java.io.FileNotFoundException: No status for hdfs://x:50001/hbase/me/.tableinfo
        at 
org.apache.hadoop.hbase.util.FSUtils.getTableInfoModtime(FSUtils.java:876)
        at 
org.apache.hadoop.hbase.util.FSTableDescriptors.get(FSTableDescriptors.java:127)
        at 
org.apache.hadoop.hbase.util.FSTableDescriptors.getAll(FSTableDescriptors.java:154)
        at 
org.apache.hadoop.hbase.master.HMaster.getHTableDescriptors(HMaster.java:1375)
{code}
Startup seems to be normal:
{code}
2011-09-02 20:55:08,198 INFO org.apache.hadoop.hbase.master.AssignmentManager: 
Bulk assigning done
2011-09-02 20:55:08,201 INFO org.apache.hadoop.hbase.master.HMaster: Master has 
completed initialization
{code}
Trace of HBASE-4308 is clearly visible from the log.

> META migration from 0.90 to trunk fails
> ---------------------------------------
>
>                 Key: HBASE-4301
>                 URL: https://issues.apache.org/jira/browse/HBASE-4301
>             Project: HBase
>          Issue Type: Bug
>          Components: master
>    Affects Versions: 0.92.0
>            Reporter: Todd Lipcon
>            Assignee: Ted Yu
>            Priority: Blocker
>             Fix For: 0.92.0
>
>         Attachments: 4301.txt, 4301_v2.txt, logs.tar.gz, master-log.txt
>
>
> I started a trunk cluster as an upgrade from 0.90.4ish, and now my META table 
> is screwed. I can't scan it, etc, and other operations fail.

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