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https://issues.apache.org/jira/browse/CASSANDRA-7124?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14219965#comment-14219965
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Yuki Morishita commented on CASSANDRA-7124:
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1) & 2) CleanupTest is 'test/unit/org/apache/cassandra/db/CleanupTest.java'. 
Add test there and check if async version is also working as the same as sync 
version.
3) I mean the sync and async methods in CompactionManager. {{performCleanup}} 
can call {{performAsyncCleanup}} internally so that you don't have to 
duplicated code.

> Use JMX Notifications to Indicate Success/Failure of Long-Running Operations
> ----------------------------------------------------------------------------
>
>                 Key: CASSANDRA-7124
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7124
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Tools
>            Reporter: Tyler Hobbs
>            Assignee: Rajanarayanan Thottuvaikkatumana
>            Priority: Minor
>              Labels: lhf
>             Fix For: 3.0
>
>         Attachments: cassandra-trunk-cleanup-7124.txt
>
>
> If {{nodetool cleanup}} or some other long-running operation takes too long 
> to complete, you'll see an error like the one in CASSANDRA-2126, so you can't 
> tell if the operation completed successfully or not.  CASSANDRA-4767 fixed 
> this for repairs with JMX notifications.  We should do something similar for 
> nodetool cleanup, compact, decommission, move, relocate, etc.



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