Just adding on to Eugeny Do you have the HBase code? There are quite a few testcases that adds coprocessors. May be if you go thro them and run them in debug mode in eclipse will help you too.
Regards Ram > -----Original Message----- > From: anil gupta [mailto:anilgupt...@gmail.com] > Sent: Wednesday, October 17, 2012 2:23 AM > To: user@hbase.apache.org > Subject: Re: Debugging Coprocessor code in Eclipse > > Hi Eugeny, > > Thanks for another nice suggestion. > > Thanks, > Anil > > On Tue, Oct 16, 2012 at 1:17 PM, Eugeny Morozov > <emoro...@griddynamics.com>wrote: > > > Anil, > > > > you could've also get some benefit from using HBaseTestingUtility. It > is > > able to run HBase cluster in standalone mode all-in-one JVM. Of > course it > > requires to have some code to create tables, assign coprocessor to > table > > and populate it with data. And then run client code against it. > > > > All of that could be done using Unit tests framework, which will give > you > > ability to test the whole server. > > > > It also possible that HBase will be crashed by itself due to > timeouts, but > > having this kind of preparation would allow you to restart it in a > matter > > of seconds to continue debuggind. > > > > Hope this helps. > > > > On Tue, Oct 16, 2012 at 8:46 PM, anil gupta <anilgupt...@gmail.com> > wrote: > > > > > Hi Ram, > > > > > > Thanks for your reply. I'll be trying your suggestions soon with > the my > > > local standalone installation of HBase and update this thread. > > > > > > Thanks, > > > Anil Gupta > > > > > > On Mon, Oct 15, 2012 at 12:03 AM, Ramkrishna.S.Vasudevan < > > > ramkrishna.vasude...@huawei.com> wrote: > > > > > > > Hi Anil > > > > > > > > We also do a lot of stuff with coprocessors MasterObservers, > > > > RegionObservers > > > > and WALObservers. > > > > Just start your master and RS in debug mode and connect remotely > from > > > > eclipse. This should be fine. Whenever the code goes to the > > > > RegionObserver > > > > or any observers automatically you will be able to debug. Only > thing > > is > > > > ensure that the JAR that is running remotely and your current > source > > code > > > > are in sync. Otherwise you may not go thro the exact lines. > > > > > > > > You can add debug mode to your JAVA_OPTS like this > > > > exec "$JAVA" $JAVA_HEAP_MAX $HBASE_OPTS > > > > -Xrunjdwp:transport=dt_socket,address=4530,server=y,suspend=n > > -classpath > > > > "$CLASSPATH" $CLASS "$@ > > > > > > > > Hope this helps. > > > > > > > > Regards > > > > Ram > > > > > > > > > > > > > -----Original Message----- > > > > > From: anil gupta [mailto:anilgupt...@gmail.com] > > > > > Sent: Monday, October 15, 2012 5:29 AM > > > > > To: user@hbase.apache.org > > > > > Subject: Debugging Coprocessor code in Eclipse > > > > > > > > > > Hi All, > > > > > > > > > > I am using HBase0.92.1 and currently working on HBase > RegionObserver > > > > > and > > > > > some other coprocessor stuff. For testing this stuff, i have to > > deploy > > > > > my > > > > > jar on the cluster and put in a lot of logging to understand > the > > > > > problems, > > > > > if any. > > > > > Is there a way to debug my region observer within eclipse. > Please > > share > > > > > your experiences/suggestions on debugging co-processors. > > > > > > > > > > I am able to debug filters and other client side code from > eclipse by > > > > > remotely connecting to cluster. But, i am unable to find a way > to > > debug > > > > > the > > > > > code which runs within RegionServers. > > > > > > > > > > Here is my random thought: > > > > > I think i would be able to debug the co-processor code if i run > the > > > > > Stand-alone HBase instance from a eclipse java project which > contains > > > > > the > > > > > java source code of HBase0.92.1 and my Region Observer. > > > > > > > > > > If the above seems like a feasible idea, then please let me > know how > > to > > > > > run > > > > > the HBase Standalone instance from a eclipse java project. Run > > > > > Configurations?Jars? > > > > > > > > > > -- > > > > > Thanks & Regards, > > > > > Anil Gupta > > > > > > > > > > > > > > > > > -- > > > Thanks & Regards, > > > Anil Gupta > > > > > > > > > > > -- > > Evgeny Morozov > > Developer Grid Dynamics > > Skype: morozov.evgeny > > www.griddynamics.com > > emoro...@griddynamics.com > > > > > > -- > Thanks & Regards, > Anil Gupta
