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
