Re: [infinispan-dev] Weekly IRC meeting minutes 2015-09-14

Hi Bela I was able to reuse the configuration created by IntelliJ and run my test in a loop outside the IDE, until I reproduced it. Unfortunately, when I was tracing all of JGroups, it was also harder to reproduce, the test JVM was crashing a lot, and I also had problems loading the trace in the IDE. I'll see if I can get a demo working for the November meeting, but this was how I managed to reproduce it: 1. Figure out where the chronon configuration and recording are stored, in my case: CHRONON_DIR=$HOME/.IntelliJIdea14/system/chronon-recordings/2015_09_08_FullSyncWriteSkewTotalOrderTest_testPut1/ 2. Copy the agent parameters from the IntelliJ console to MAVEN_FORK_OPTS (this is Infinispan-specific, if maven-surefire isn't forking you can use MAVEN_OPTS instead): export MAVEN_FORK_OPTS="-javaagent:$HOME/.IntelliJIdea14/config/plugins/chronon/lib/recorder/recorder-3.70.0.200.jar=$CHRONON_DIR/config.txt -agentpath:$HOME/.IntelliJIdea14/config/plugins/chronon/lib/recorder/native/librecorderagent64-3.0.7.so -noverify" 3. Run these in a loop until you get a test failure: rm -rf $CHRONON_DIR/*/ \ mvn test -pl core '-Dtest=org.infinispan.tx.totalorder.simple.dist.FullSyncWriteSkewTotalOrderTest#testPut' 4. Open $CHRONON_DIR in IntelliJ with Run -> Open Chronon Recording. 5. Enjoy debugging backwards in time... Well, I haven't got to the point where I enjoy it yet, but I think I made some progress :) Cheers Dan On Tue, Sep 15, 2015 at 12:12 PM, Bela Ban <bban(a)redhat.com&gt; wrote: > Hi Dan, > > what a coincidence, I tried Chronon as well, but outside of IDEA as it > requires the commercial version and I only have the community version... > > However, using something like Chronos is certainly worth looking into, > for all of us, as (as you mentioned) you only need to reproduce the > error once and can then go back in time to see the stack, variables etc, > so you know exactly what's going on. > > If someone gets Chronos (or any other time travelling debugger) to work, > this would be worth a demo at our November meeting, and would add a tool > of tremendous value to our common toolset ! > > Any takers ? > > > On 09/15/2015 03:19 AM, Dan Berindei wrote: >> Hi guys >> >> Sorry for missing the meeting yesterday, I was out most of the day. >> >> I started last week trying to help Bela with the TCP_NIO2 problems. I >> wasn't quite satisfied with JGroups' logging, so I tried to use the >> Chronon embedded with IntelliJ to debug the tests. In theory it's nice >> because you only have to reproduce a random failure once, and you can >> replay the trace as many times as you want, but I got IntelliJ to hang >> way too many times, so I had to give up. Bela fixed the correctness >> problem by himself, but the test suite is about 50% slower with >> TCP_NIO2, so we can't use it instead of TCP without further >> investigation. >> >> Then I got back to ISPN-5699, and after a lot of fiddling with the >> EntryFactoryImpl methods and fixing failing tests, this morning I >> finally issued the PR. >> >> This week, I need to look into a replicated-mode read performance >> regression, and then get back to the sequential interceptor >> interfaces. >> >> Cheers >> Dan >> >> >> On Mon, Sep 14, 2015 at 6:46 PM, Tristan Tarrant <ttarrant(a)redhat.com&gt; wrote: >>> Hi all, >>> >>> here are the meeting minutes from today's IRC meeting: >>> >>> http://transcripts.jboss.org/meeting/irc.freenode.org/infinispan/2015/inf... >>> >>> Enjoy >>> >>> Tristan >>> -- >>> Tristan Tarrant >>> Infinispan Lead >>> JBoss, a division of Red Hat >>> _______________________________________________ >>> infinispan-dev mailing list >>> infinispan-dev(a)lists.jboss.org >>> https://lists.jboss.org/mailman/listinfo/infinispan-dev >> _______________________________________________ >> infinispan-dev mailing list >> infinispan-dev(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/infinispan-dev > _______________________________________________ > infinispan-dev mailing list > infinispan-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/infinispan-dev _______________________________________________ infinispan-dev mailing list infinispan-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/infinispan-dev