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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-10215) TableNotFoundException should be thrown after removing stale znode in ETH
Date Tue, 24 Dec 2013 19:17:50 GMT

    [ https://issues.apache.org/jira/browse/HBASE-10215?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13856427#comment-13856427
] 

Hudson commented on HBASE-10215:
--------------------------------

SUCCESS: Integrated in HBase-0.94-security #369 (See [https://builds.apache.org/job/HBase-0.94-security/369/])
HBASE-10215 TableNotFoundException should be thrown after removing stale znode in ETH (rajeshbabu:
rev 1553311)
* /hbase/branches/0.94/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java
* /hbase/branches/0.94/src/main/java/org/apache/hadoop/hbase/master/handler/EnableTableHandler.java
* /hbase/branches/0.94/src/test/java/org/apache/hadoop/hbase/master/TestAssignmentManager.java


> TableNotFoundException should be thrown after removing stale znode in ETH
> -------------------------------------------------------------------------
>
>                 Key: HBASE-10215
>                 URL: https://issues.apache.org/jira/browse/HBASE-10215
>             Project: HBase
>          Issue Type: Bug
>          Components: master
>    Affects Versions: 0.96.1, 0.94.14
>            Reporter: rajeshbabu
>            Assignee: rajeshbabu
>            Priority: Minor
>             Fix For: 0.98.0, 0.94.16, 0.96.2, 0.99.0
>
>         Attachments: HBASE-10215.patch, HBASE-10215_94.patch, HBASE-10215_v2.patch, HBASE-10215_v2.patch
>
>
> Lets suppose master went down while creating table then znode will be left in ENABLING
state. Master to recover them on restart. 
> If there are no meta entries for the table.
> While recovering the table we are checking whether table exists in meta or not, if not
we are removing the znode. After removing znode we need to throw TableNotFoundException. Presently
not throwing the exception so the znode will be recrated. It will be stale forever. Even on
master restart we cannot delete. We cannot create the table with same name also.
> {code}
>       // Check if table exists
>       if (!MetaReader.tableExists(catalogTracker, tableName)) {
>         // retainAssignment is true only during recovery.  In normal case it is false
>         if (!this.skipTableStateCheck) {
>           throw new TableNotFoundException(tableName);
>         } 
>         try {
>           this.assignmentManager.getZKTable().removeEnablingTable(tableName, true);
>         } catch (KeeperException e) {
>           // TODO : Use HBCK to clear such nodes
>           LOG.warn("Failed to delete the ENABLING node for the table " + tableName
>               + ".  The table will remain unusable. Run HBCK to manually fix the problem.");
>         }
>       }
> {code}



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