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https://issues.apache.org/jira/browse/HBASE-3900?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13092431#comment-13092431
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Ted Yu commented on HBASE-3900:
-------------------------------

In build 2154, I didn't see exception related to HServerLoad deserialization.
The TestMergeTool.testMergeTool failure was due to the following check:
{code}
      HBaseAdmin.checkHBaseAvailable(getConf());
      LOG.fatal("HBase cluster must be off-line.");
{code}
HBase cluster from some other test(s) was hanging.

> Expose progress of a major compaction in UI and/or in shell
> -----------------------------------------------------------
>
>                 Key: HBASE-3900
>                 URL: https://issues.apache.org/jira/browse/HBASE-3900
>             Project: HBase
>          Issue Type: Task
>            Reporter: stack
>            Assignee: Brad Anderson
>              Labels: patch
>             Fix For: 0.92.0
>
>         Attachments: 3900.addendum2, HBASE-3900.patch
>
>
> A general recommendation is to turn off major compactions and run them 
> externally only currently the only way to follow progress of a major 
> compaction is by study of regionserver logs.  Add a feature that gives a 
> percentage complete of major compaction up in the UI or in shell.

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