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
