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https://issues.apache.org/jira/browse/HBASE-1852?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12854298#action_12854298
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Todd Lipcon commented on HBASE-1852:
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I saw this behavior in a stress test just now as well on tip of 20.
Since we know meta splitting doesn't work, can we put in some code that allows
META's one region to grow without bound regardless of its size?
> HConnectionManager.testTableOnlineState will get into infinite loop if more
> than one .META. region
> --------------------------------------------------------------------------------------------------
>
> Key: HBASE-1852
> URL: https://issues.apache.org/jira/browse/HBASE-1852
> Project: Hadoop HBase
> Issue Type: Bug
> Components: client
> Affects Versions: 0.20.0
> Environment: OSX/Linux
> Reporter: Cosmin Lehene
> Fix For: 0.21.0
>
> Attachments: 0001-Fixed-.META.-split-bug-v2.patch,
> 0001-Fixed-.META.-split-bug.patch, HBASE-1852-unittest1.patch,
> HBaseMetaSplitIssues.java
>
> Original Estimate: 24h
> Remaining Estimate: 24h
>
> Create 3 tables (preferably on a clean cluster to avoid other potential
> issues)
> Split .META.
> From the master web inteface try to click on the first table - the page will
> not load and refreshing the main page will show lots of requests.
> HBaseAdmin.testTableOnlineState will get into an infinite loop if .META. has
> more than one region. This method should probably use a regular scanner and
> an iterator.
> I guess this issue would also happen with a single .META. region if rrs =
> getRegionServerWithRetries(s) would get an UnknownScannerException (from a
> scanner lease expiration on the region server), but I haven't double checked
> this.
> I attached a java method that you can use as a reference to reproduce the
> behavior. However, since it calls split() on .META. and that is async, you
> might have to run it twice and check that .META. actually splitted before
> getting into the infinite loop.
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