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HBase >> mail # dev >> [ANNOUNCE] The 1st hbase 0.94.9 release candidate is available for download

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Re: [ANNOUNCE] The 1st hbase 0.94.9 release candidate is available for download
Thanks JM.

Hmm... TestRegionObserverScannerOpenHook has not failed on jenkins (both Apache or Andy EC2 setup).
The exception just means that a region either moved or was split and has not been reassigned, yet.
Unless this *only* happens in 0.94.9 and did not happen before I do not think this is a reason for concern.
-- Lars

From: Jean-Marc Spaggiari <[EMAIL PROTECTED]>
Sent: Tuesday, June 25, 2013 3:51 PM
Subject: Re: [ANNOUNCE] The 1st hbase 0.94.9 release candidate is available for download
Here is my feedback.

- Downloaded the files, checked the signature, uncompressed, checked
changes.txt => Fine
- Checked the documentation => One page not found under "Ref Guide
(multi-page)" link on the index page. Should it be there?
- Ran the test suite on 2 different servers,
TestRegionObserverScannerOpenHook failed 10 times in a row with 8
thread, 4, 2 and 1.
- IntegrationTestLoadAndVerify => REFERENCES_CHECKED=985565 with
0.94.9 and REFERENCES_CHECKED=9855611 with 0.94.8. Don't know what to
- integrationTestBigLinkedList => Fine
- HBCK still reporting fine after all those tests.

However, I have this exception many times on the logs, every 3 seconds:

2013-06-24 22:24:01,159 ERROR
org.apache.hadoop.hbase.regionserver.HRegionServer: Closing scanner
for IntegrationTestLoadAndVerify,\xA8k\xCA\x1A\xF2\x86\xBC\x8A,1372126832536.31c325cb8ae32b1ed0f4c4667d787165.
org.apache.hadoop.hbase.NotServingRegionException: Region is not
online: IntegrationTestLoadAndVerify,\xA8k\xCA\x1A\xF2\x86\xBC\x8A,1372126832536.31c325cb8ae32b1ed0f4c4667d787165.
        at org.apache.hadoop.hbase.regionserver.HRegionServer.getRegion(HRegionServer.java:3509)
        at org.apache.hadoop.hbase.regionserver.HRegionServer$ScannerListener.leaseExpired(HRegionServer.java:2740)
        at org.apache.hadoop.hbase.regionserver.Leases.run(Leases.java:100)
        at java.lang.Thread.run(Thread.java:662)

- Performed a rolling restart for the RS. 2500 regions to move
around... => Fine. Took 74 minutes. Changed to regoin_mover to
multhread, took 16 minutes.
- Looked at the master and region logs, everything seems to be ok.
- Merged all the regions from a table to a single region.
- Checked HBCK, one issue on one table which is not the one merged.
Issue was not there before the restarts, etc.  Few hbck repairs
repaired everything.
- Logs still good, table merged correctly.
- Triggered a major compaction, got the table splitted back to 36 regions.
- Ran the balalancer, region got spreaded over the nodes. => Fine, but
had to run it twice. First time 50% of the regions stayed assigned to
one RS.
- Stopped, restored my customed balancer, restart, rebalanced => Fine.
- Create table, put, scan, get, disable, drop, balance, list,
truncate_preserve, truncate from shell => Fine
- Ran one MR job (416 mappers), went well, nothing in the logs.

So to summarize: +1 ;) Even is there is 2 things to verify
(TestRegionObserverScannerOpenHook and NotServingRegionException). I
don't think they related to this release.

I will post the performances comparison later tonight or tomorrow.
(Need to add 0.94.8 also since I'm late),


2013/6/24 Jean-Marc Spaggiari <[EMAIL PROTECTED]>:
> Oh! Cool! A new toy for the week!  ;)
> Thanks Lars! I will start right now to test it! (And I will do the
> remaining perf testing just after or in parallel...)
> 2013/6/24 lars hofhansl <[EMAIL PROTECTED]>:
>> The 1st 0.94.9 RC is available for download at http://people.apache.org/~larsh/hbase-0.94.9-rc0/
>> Signed with my code signing key: C7CFE328
>> Like the previous point releases, 0.94.9 is a primarily a bug fix release. This RC is comparatively small with 26 issues resolved against it:
>>     [HBASE-8453] - TestImportExport failing again due to configuration issues
>>     [HBASE-8494] - TestRemoteAdmin#testClusterStatus should not assume 'requests' does not change
>>     [HBASE-8522] - Archived hfiles and old hlogs may be deleted immediately by HFileCleaner, LogCleaner in HMaster