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Posted to issues@hbase.apache.org by "Jesse Yates (JIRA)" <ji...@apache.org> on 2012/11/29 22:16:58 UTC

[jira] [Created] (HBASE-7240) Cleanup old snapshots on start

Jesse Yates created HBASE-7240:
----------------------------------

             Summary: Cleanup old snapshots on start
                 Key: HBASE-7240
                 URL: https://issues.apache.org/jira/browse/HBASE-7240
             Project: HBase
          Issue Type: Sub-task
    Affects Versions: hbase-6055
            Reporter: Jesse Yates
             Fix For: hbase-6055


If the master is hard stopped (i.e. kill -9), the snapshot handler or SnapshotManager may not have a chance to cleanup after the snapshot, leaving extraneous files in the working snapshot directory (/hbase/.snapshot/.tmp directory).

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[jira] [Updated] (HBASE-7240) Cleanup old snapshots on start

Posted by "Jesse Yates (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/HBASE-7240?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jesse Yates updated HBASE-7240:
-------------------------------

    Attachment: hbase-7240.patch

Patch for this. Adds a start method to SnapshotManager that just does cleanup. 

Didn't add a unit test since it required spinnning up a minicluster (or down and then up in an exisiting test) for just checking a couple line change that can be verified on sight easily.
                
> Cleanup old snapshots on start
> ------------------------------
>
>                 Key: HBASE-7240
>                 URL: https://issues.apache.org/jira/browse/HBASE-7240
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Client, master, regionserver, snapshots, Zookeeper
>    Affects Versions: hbase-6055
>            Reporter: Jesse Yates
>            Assignee: Jesse Yates
>             Fix For: hbase-6055
>
>         Attachments: hbase-7240.patch
>
>
> If the master is hard stopped (i.e. kill -9), the snapshot handler or SnapshotManager may not have a chance to cleanup after the snapshot, leaving extraneous files in the working snapshot directory (/hbase/.snapshot/.tmp directory).

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[jira] [Commented] (HBASE-7240) Cleanup old snapshots on start

Posted by "Jesse Yates (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/jira/browse/HBASE-7240?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13506992#comment-13506992 ] 

Jesse Yates commented on HBASE-7240:
------------------------------------

It would be a delete of the /hbase/snapshot/.tmp directory. Might change it we continue running snapshots across master failure sometime in the future, but for the moment, its just a single RPC.
                
> Cleanup old snapshots on start
> ------------------------------
>
>                 Key: HBASE-7240
>                 URL: https://issues.apache.org/jira/browse/HBASE-7240
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Client, master, regionserver, snapshots, Zookeeper
>    Affects Versions: hbase-6055
>            Reporter: Jesse Yates
>             Fix For: hbase-6055
>
>
> If the master is hard stopped (i.e. kill -9), the snapshot handler or SnapshotManager may not have a chance to cleanup after the snapshot, leaving extraneous files in the working snapshot directory (/hbase/.snapshot/.tmp directory).

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[jira] [Commented] (HBASE-7240) Cleanup old snapshots on start

Posted by "Jesse Yates (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/jira/browse/HBASE-7240?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13506808#comment-13506808 ] 

Jesse Yates commented on HBASE-7240:
------------------------------------

We could create a background chore that periodically checks this directory against the running snapshots, but its likely a rare occurrence that we fail a snapshot and can't cleanup after it. We probably just need to add a little cleanup mechanism to on startup (could just drop this into the SnapshotManager as it also plays well into a possible future goal of recovering snapshot attempts between master failures).
                
> Cleanup old snapshots on start
> ------------------------------
>
>                 Key: HBASE-7240
>                 URL: https://issues.apache.org/jira/browse/HBASE-7240
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Client, master, regionserver, snapshots, Zookeeper
>    Affects Versions: hbase-6055
>            Reporter: Jesse Yates
>             Fix For: hbase-6055
>
>
> If the master is hard stopped (i.e. kill -9), the snapshot handler or SnapshotManager may not have a chance to cleanup after the snapshot, leaving extraneous files in the working snapshot directory (/hbase/.snapshot/.tmp directory).

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[jira] [Commented] (HBASE-7240) Cleanup old snapshots on start

Posted by "Ted Yu (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/jira/browse/HBASE-7240?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13506989#comment-13506989 ] 

Ted Yu commented on HBASE-7240:
-------------------------------

Cleanup at startup would be completed quickly, right ?
I assume this wouldn't affect total recovery time much.
                
> Cleanup old snapshots on start
> ------------------------------
>
>                 Key: HBASE-7240
>                 URL: https://issues.apache.org/jira/browse/HBASE-7240
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Client, master, regionserver, snapshots, Zookeeper
>    Affects Versions: hbase-6055
>            Reporter: Jesse Yates
>             Fix For: hbase-6055
>
>
> If the master is hard stopped (i.e. kill -9), the snapshot handler or SnapshotManager may not have a chance to cleanup after the snapshot, leaving extraneous files in the working snapshot directory (/hbase/.snapshot/.tmp directory).

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[jira] [Updated] (HBASE-7240) Cleanup old snapshots on start

Posted by "Jesse Yates (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/HBASE-7240?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jesse Yates updated HBASE-7240:
-------------------------------

    Assignee: Jesse Yates
    
> Cleanup old snapshots on start
> ------------------------------
>
>                 Key: HBASE-7240
>                 URL: https://issues.apache.org/jira/browse/HBASE-7240
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Client, master, regionserver, snapshots, Zookeeper
>    Affects Versions: hbase-6055
>            Reporter: Jesse Yates
>            Assignee: Jesse Yates
>             Fix For: hbase-6055
>
>
> If the master is hard stopped (i.e. kill -9), the snapshot handler or SnapshotManager may not have a chance to cleanup after the snapshot, leaving extraneous files in the working snapshot directory (/hbase/.snapshot/.tmp directory).

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[jira] [Commented] (HBASE-7240) Cleanup old snapshots on start

Posted by "Matteo Bertozzi (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/jira/browse/HBASE-7240?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13506939#comment-13506939 ] 

Matteo Bertozzi commented on HBASE-7240:
----------------------------------------

+1 on just have the cleanup at startup
                
> Cleanup old snapshots on start
> ------------------------------
>
>                 Key: HBASE-7240
>                 URL: https://issues.apache.org/jira/browse/HBASE-7240
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Client, master, regionserver, snapshots, Zookeeper
>    Affects Versions: hbase-6055
>            Reporter: Jesse Yates
>             Fix For: hbase-6055
>
>
> If the master is hard stopped (i.e. kill -9), the snapshot handler or SnapshotManager may not have a chance to cleanup after the snapshot, leaving extraneous files in the working snapshot directory (/hbase/.snapshot/.tmp directory).

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