[jira] [Assigned] (HBASE-9497) Old .META. .tableinfo file kills HMaster

["Himanshu Vashishtha (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-9497?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Himanshu Vashishtha reassigned HBASE-9497:
------------------------------------------

    Assignee: Himanshu Vashishtha
    
> 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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