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From "Aleksandr Shulman (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9497) Old .META. .tableinfo file kills HMaster
Date Thu, 12 Sep 2013 00:23:52 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9497?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13764997#comment-13764997
] 

Aleksandr Shulman commented on HBASE-9497:
------------------------------------------

Thanks [~saint.ack@gmail.com] :)
Yep, we should test both clean shutdown and messy shutdown as part of general upgrade testing.
                
> Old .META. .tableinfo file kills HMaster
> ----------------------------------------
>
>                 Key: HBASE-9497
>                 URL: https://issues.apache.org/jira/browse/HBASE-9497
>             Project: HBase
>          Issue Type: Bug
>          Components: master, migration
>    Affects Versions: 0.95.2
>            Reporter: Himanshu Vashishtha
>            Assignee: Himanshu Vashishtha
>             Fix For: 0.98.0, 0.96.0
>
>         Attachments: HBase-9497.patch
>
>
> In pre-0.96, .META. has .tableinfo files which refer to .META. On startup, master tries
to read it and aborts since the table name has changed. The .META. .tableinfo files are not
being created in 0.94.x (fixed for 96 in HBASE-6971; but this can be reproduced when migrating
from 0.92 -> 0.94 -> 0.96. Our old users would be affected by this.
> {code}
> java.lang.IllegalArgumentException: .META. no longer exists. The table has been renamed
to hbase:meta
> 	at org.apache.hadoop.hbase.TableName.valueOf(TableName.java:291)
> 	at org.apache.hadoop.hbase.TableName.valueOf(TableName.java:283)
> 	at org.apache.hadoop.hbase.HTableDescriptor.readFields(HTableDescriptor.java:960)
> 	at org.apache.hadoop.hbase.util.Writables.getWritable(Writables.java:131)
> 	at org.apache.hadoop.hbase.util.Writables.getWritable(Writables.java:101)
> 	at org.apache.hadoop.hbase.HTableDescriptor.parseFrom(HTableDescriptor.java:1407)
> 	at org.apache.hadoop.hbase.util.FSTableDescriptors.readTableDescriptor(FSTableDescriptors.java:521)
> 	at org.apache.hadoop.hbase.util.FSTableDescriptors.createTableDescriptorForTableDirectory(FSTableDescriptors.java:707)
> 	at org.apache.hadoop.hbase.util.FSTableDescriptors.createTableDescriptor(FSTableDescriptors.java:683)
> 	at org.apache.hadoop.hbase.util.FSTableDescriptors.createTableDescriptor(FSTableDescriptors.java:670)
> 	at org.apache.hadoop.hbase.master.MasterFileSystem.checkRootDir(MasterFileSystem.java:485)
> 	at org.apache.hadoop.hbase.master.MasterFileSystem.createInitialFileSystemLayout(MasterFileSystem.java:145)
> 	at org.apache.hadoop.hbase.master.MasterFileSystem.<init>(MasterFileSystem.java:129)
> 	at org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:761)
> {code}

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