I wish I could provide that. The problem happen on our production site and only after about an hour of running. I managed to reproduce it once on test machine after many tries. I had to create many publishers and many consumers. On production mahcine it always happen (but at random times).
It seems like a race condition that happen by chance. More chance of it happening in a busy deployment with many read/writes to the same queue. Andy rajdavies wrote: > > If you experience problems - the best thing to do is to raise a > support issues (jira) , with a junit test case (hopefully one class - > look at the src for examples) asap > Provide details about your environment, the version of AMQ you are > running and any config information as well. > > cheers, > > Rob > > On Dec 22, 2007, at 5:33 AM, amaas wrote: > >> >> I watch this thread with interest because I also have issues with >> activemq >> and have not found any solution (using released version 5.0). I kind >> of lost >> hope right now with using activemq. >> >> I use Stomp for publisher and consumer. There are about 30 producers >> and 40 >> consumers each using their own connection. Traffic is only about a >> couple >> per second with avg size of 500M. >> >> 1) Using AMQ storage, I experienced consumers block waiting for msgs >> when >> there are msgs in the store and publisher submitting without >> problem. This >> usually happens after half an hour or an hour after deployment. >> Restarting >> activemq would fix the problem once (subsequent restart seems to >> lost all >> msgs; the first restart showing 0 msg count despite non zero msg in >> the >> queue) >> This error coincide with the blockage: >> >> 2007-12-12 19:38:02,597 [0.31.1.20:46277] ERROR >> RecoveryListenerAdapter >> - Message id ID:prs2005-35745-1197487997180-4:28:-1:1:4 could not be >> recovered from the data store! >> >> 2) I then switch to use Kaha storage. The same problem occured. >> >> 3) I then try journaledJDBC with derby. I observed a different >> problem. I >> saw errors and for each error I lost the msg. So while I was happier >> that >> activemq didn't stop, I lost messages instead. The error in the log: >> >> 2007-12-19 17:00:09,826 [eckpoint worker] ERROR TransactionTemplate >> - Having to Rollback - caught an exception: java.io.IOException: A >> truncation error was encountered trying to shrink BLOB 'XX-RESOLVE- >> XX' to >> length 1048576. >> >> 4) I then try journaledJDBC with mysql. Right away I got duplicate >> key error >> on injection. This is becuase I use virtual topic. Apparently for each >> message there are two INSERT using the same record id. So I switch to >> regular queue. This time I started seeing this error in the log: >> >> 2007-12-20 15:31:45,878 [eckpoint Worker] ERROR >> JournalPersistenceAdapter >> - Failed to checkpoint a message store: >> java.util.concurrent.ExecutionException: java.io.IOException: Already >> started >> >> I am really hoping I can use activemq with amq store (don't want to >> extra db >> server to manage). >> But I just can't get it to work cleanly for me. >> -- >> View this message in context: >> http://www.nabble.com/ActiveMQ-thoughts-tp14262131s2354p14466561.html >> Sent from the ActiveMQ - User mailing list archive at Nabble.com. >> > > > -- View this message in context: http://www.nabble.com/ActiveMQ-thoughts-tp14262131s2354p14504909.html Sent from the ActiveMQ - User mailing list archive at Nabble.com.
