Inline. On Tue, Sep 3, 2013 at 11:04 PM, Elliott Clark <[email protected]> wrote:
> So since the first question is vendor specific, lets take that off list. > > The core dumps are mostly while starting a region server up under > load, but they are concerning. They are on JDK 1.7.15, which isn't > the newest. So I'm hoping that release 25 will help. > Anil: Yes, trying out 25 will be better. It would be great if you can share your results whenever your try out 1.7u25. Meanwhile, i will also try to do the same in my environment. > > I also run YCSB on the cluster after all the tests and during those > runs the region servers have been very stable. > > On Tue, Sep 3, 2013 at 10:42 PM, anil gupta <[email protected]> wrote: > > 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 > -- Thanks & Regards, Anil Gupta
