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https://issues.apache.org/jira/browse/HBASE-10949?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13968054#comment-13968054
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ramkrishna.s.vasudevan commented on HBASE-10949:
------------------------------------------------
Nice.
> Reversed scan could hang
> ------------------------
>
> Key: HBASE-10949
> URL: https://issues.apache.org/jira/browse/HBASE-10949
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.98.0
> Reporter: Jimmy Xiang
> Assignee: Jimmy Xiang
> Priority: Critical
> Fix For: 0.99.0, 0.98.2
>
> Attachments: hbase-10949.patch, master-jstack.log
>
>
> When I play with ITBLL (from trunk tip), sometimes, meta scan hangs when the
> cluster is rolling restarted. When this happens, the master takes about 1000%
> of CPU. It looks like there is an infinite loop somewhere. The logs show
> nothing interesting except some meta scanner RPC calls timed out. Jstask
> shows the 10 high QoS RPC handlers are busy with meta scanning.
> However, if I run it again without HBASE-10018, things are fine. I suspect
> there is something to do with the small/reverse scan.
> By the way, I see this problem even with log replay off and hfile version = 2.
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