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.
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
