Gary:
Take a look at HBASE-15302 where you can find TestWALSplit.java in
https://issues.apache.org/jira/secure/attachment/12794162/HBASE-15302-branch-1-v1.patch

FYI

On Fri, Oct 14, 2016 at 5:19 PM, Gary Helmling <ghelml...@gmail.com> wrote:

> I just posted a patch for HBASE-16754 (dropped compaction markers during
> log split), which might qualify as a sinker for the RC.  This issue was
> introduced by the change in HBASE-15441 (which fixed another log splitting
> issue), which went in to 1.2.1.  It's a relatively rare distributed race.
> The impact is that at least compactions can't run until the region is
> reassigned.  It looks like the code in 1.2 may be slightly different -- I
> don't see TestWALSplit for one -- but I think the same issue will apply in
> branch-1.2.  I'll look more closely at the impact for the RC, but wanted to
> give a heads up.
>
> On Mon, Oct 10, 2016 at 7:58 AM Sean Busbey <bus...@apache.org> wrote:
>
> > The first release candidate for HBase 1.2.4 is available for download at:
> >
> > https://dist.apache.org/repos/dist/dev/hbase/hbase-1.2.4RC0/
> >
> > Maven artifacts are also available in a staging repository at:
> >
> > https://repository.apache.org/content/repositories/orgapachehbase-1155/
> >
> > Artifacts are signed with my key (0D80DB7C) published in our KEYS
> > file at http://www.apache.org/dist/hbase/KEYS
> >
> > The RC corresponds to the signed tag 1.2.4RC0, which currently points
> > to commit ref
> >
> > 04bd0ec8e4cb2f39e5f787126f9b6645dabf27df
> >
> > The detailed source and binary compatibility report vs 1.2.3 has been
> > published for your review, at:
> >
> >
> > https://dist.apache.org/repos/dist/dev/hbase/hbase-1.2.4RC0/
> 1.2.3_1.2.4RC0_compat_report.html
> >
> > HBase 1.2.4 is the fourth patch release in the HBase 1.2 line, continuing
> > on
> > the theme of bringing a stable, reliable database to the Hadoop and NoSQL
> > communities. This release includes about 30 bug fixes since 1.2.3.
> > Critical fixes include:
> >
> > * HBASE-16340 Xerces implementation jars removed (incompatible change)
> > * HBASE-15984 Given failure to parse a given WAL that was closed
> > cleanly, replay the WAL.
> > * HBASE-16721 Concurrency issue in WAL unflushed seqId tracking
> >
> > The full list of fixes included in this release is available at:
> >
> >
> > https://issues.apache.org/jira/secure/ReleaseNote.jspa?
> projectId=12310753&version=12338116
> >
> > and in the CHANGES.txt file included in the distribution.
> >
> > Please try out this candidate and vote +/-1 by 12:00 Pacific Time on
> > Monday, 2016-10-17 as to whether we should release these artifacts
> > as HBase 1.2.4.
> >
> > thanks!
> > -busbey
> >
>

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