[jira] [Commented] (HBASE-12091) Optionally ignore edits for dropped tables for replication.

["Lars Hofhansl (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-12091?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14147987#comment-14147987 ] 

Lars Hofhansl commented on HBASE-12091:
---------------------------------------

This might not actually be as simple as it sounds to do efficiently.
We could trivially check whether the table does not exist at the slave by just checking the exception returned. But that's not what we want. We to check whether the table exists on the source, and for each edit that's expensive (a META or ZK lookup), so I'd need to build in some kind of caching.


> Optionally ignore edits for dropped tables for replication.
> -----------------------------------------------------------
>
>                 Key: HBASE-12091
>                 URL: https://issues.apache.org/jira/browse/HBASE-12091
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Lars Hofhansl
>
> We just ran into a scenario where we dropped a table from both the source and the sink, but the source still has outstanding edits that now it could not get rid of. Now all replication is backed up behind these unreplicatable edits.
> We should have an option to ignore edits for tables dropped at the source.



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