Of course. I'll reply back when I have definitive results
On Tue, Sep 3, 2013 at 11:17 PM, anil gupta <[email protected]> wrote: > 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
