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


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anil gupta 2013-09-03, 23:26
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lars hofhansl 2013-09-04, 00:35
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anil gupta 2013-09-04, 05:03
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anil gupta 2013-09-04, 05:06
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Elliott Clark 2013-09-04, 05:26
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Re: (HBASE-5261)HBase 0.94 cerification for JDK7
Hi Elliot,

That's cool!
We have CDH Enterprise license. Would you mind pointing me to the doc/link
that states same?
However, core dumps sounds bad for prod environment. Are there any specific
patterns for core-dumps? Does it only happens under very heavy load? If
yes, then how much read/write load?

If you want to take this offline, i am fine with that also.

Thanks,
Anil
On Tue, Sep 3, 2013 at 10:26 PM, Elliott Clark <[EMAIL PROTECTED]> wrote:

> 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
> workload.
>
> 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]>
> >>> To: "[EMAIL PROTECTED]" <[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
>

--
Thanks & Regards,
Anil Gupta
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Elliott Clark 2013-09-04, 06:04
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anil gupta 2013-09-04, 06:17
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Elliott Clark 2013-09-04, 06:29
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Stack 2013-09-04, 21:32
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anil gupta 2013-09-05, 04:11
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Andrew Purtell 2013-09-04, 21:14
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anil gupta 2013-09-05, 04:16