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From "Ramkrishna.S.Vasudevan" <ramkrishna.vasude...@huawei.com>
Subject 0.90.6 First release cut
Date Fri, 13 Jan 2012 10:01:37 GMT
Hi Devs 

Regarding the 0.90.6 release i would like share few things about the issues
that were added to it 

->  HBASE- 5008  - The clusters can't provide services because Region can't
flush. <https://issues.apache.org/jira/browse/HBASE-5008>  
-> HBASE- 5060 - HBase client is blocked forever
-> HBASE-5088 - A concurrency issue on SoftValueSortedMap
-> HBASE-5009 - Failure of creating split dir if it already exists prevents
splits from happening further
-> HBASE-5073 - Registered listeners not getting removed leading to memory
leak in HBaseAdmin <https://issues.apache.org/jira/browse/HBASE-5073>  
-> HBASE-5137 - MasterFileSystem.splitLog() should abort even if
waitOnSafeMode() throws IOException
-> HBASE-5178 - Backport HBASE-4101 - Regionserver Deadlock

The above are some important issues that are committed. Apart from these we
have few more important defects committed. 

Issues HBASE-5179 - Concurrent processing of processFaileOver and
ServerShutdownHandler may cause region to be assigned before log splitting
is completed, causing data loss
HBASE-5155 - ServerShutDownHandler And Disable/Delete should not happen
parallely leading to recreation of regions that were deleted
are in progress. 

We have also backported some of the critical issues from trunk like 

HBASE-4899 - Region would be assigned twice easily with continually killing
server and moving region in testing environment
HBASE-5152 - Region is on service before completing initialization when
doing rollback of split, it will affect read correctness
HBASE-4878 - Master crash when splitting hlog may cause data loss

I would like to take a release cut of this version by tomorrow EOD (i.e.
Saturday morning as per US time). 

Pls share your comments. 


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