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HBase >> mail # user >> (HBASE-5261)HBase 0.94 cerification for JDK7

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Re: (HBASE-5261)HBase 0.94 cerification for JDK7
Cloudera (my employer) has certified their distribution(CDH4.2+) on
JDK7.  That includes HBase 94.  I'm sure they would answer questions
about what was tested, on their mailing lists or forums.

I imagine that Hortonworks has done similar testing though I am not as
well versed in it.

I personally been running a test cluster with Integration tests (for
0.96) on jdk7, G1 gc, and 30 gig heaps for a couple of months now.
There have been a couple of times that the region servers have core
dumped because of the JVM.  However I would say the region servers are
some what stable with JDK 1.07.15 and the G1gc. My test cluster is
pretty taxed and your milage might vary; it's worth testing on your

I'm currently upgrading the jvm to release 25 hoping that the core
dumps will be solved.

On Tue, Sep 3, 2013 at 10:06 PM, anil gupta <[EMAIL PROTECTED]> wrote:
> Also, if HBase0.94 is officially certified to work with JDK7 then it will
> save duplicate work from Individual users like me and you. Currently GC
> with big JVM heaps is a big concern with HBase. If users will get options
> to use G1GC then it might alleviate some pains of many HBase users.
> On Tue, Sep 3, 2013 at 10:03 PM, anil gupta <[EMAIL PROTECTED]> wrote:
>> Hi Lars,
>> Even if we setup Jenkins with JDK7 then also we wont be able to use JDK7
>> in prod HBase cluster. Beacuse, as per our process, we can only use the JDK
>> that is certified by Apache HBase. If we don't follow this rule then IT/DBA
>> folks wont support us. That's why i am looking for JDK7 certification of
>> HBase0.94. It would be great if an official certification can be done.
>> Thanks,
>> Anil
>> On Tue, Sep 3, 2013 at 5:35 PM, lars hofhansl <[EMAIL PROTECTED]> wrote:
>>> We (Salesforce) are using HBase with JDK7. No issues seen so far.
>>> 0.94 is not "officially certified" to work on JDK7 (we have no JDK7
>>> jenkins, etc).
>>> It might be good to setup a JDK7 jenkins for 0.94. Any objections to
>>> doing that?
>>> -- Lars
>>> ----- Original Message -----
>>> From: anil gupta <[EMAIL PROTECTED]>
>>> Cc:
>>> Sent: Tuesday, September 3, 2013 4:26 PM
>>> Subject: (HBASE-5261)HBase 0.94 cerification for JDK7
>>> Hi All,
>>> We are thinking of running HBase(we have JVM heaps larger than 25 GB) with
>>> JDK7 to use G1 garbage collection, but as a precaution we would like HBase
>>> to be certified with JDK7. I see this ticket for same:
>>> https://issues.apache.org/jira/browse/HBASE-5261
>>> Above havent had any activity from November, 2012. Are there any timelines
>>> to certify HBase 0.94 with JDK7?
>>> --
>>> Thanks & Regards,
>>> Anil Gupta
>> --
>> Thanks & Regards,
>> Anil Gupta
> --
> Thanks & Regards,
> Anil Gupta