Re: [rules-users] Noob desperately needing help
Davide, Thanks for the response…I have also fired the attached code from outside a rule, and it works perfectly (I created a hidden test menu option that allows me to call runNeedleChestDecompressionReport()). In fact, every other instance of using ZipUtil works fine. And the place where the rule is hanging hasn’t actually gotten to the byte array yet…it’s creating internal data structures to handle the input. I’m grasping for straws, I know… Paul -- View this message in context: http://drools.46999.n3.nabble.com/Noob-desperately-needing-help-tp4020589p4020609.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Noob desperately needing help
I agree with Davide. Google with java.util.zip.Deflater native method init returns several interesting hits, some of which indicate that it is possible to run into an OOME, e.g., when heap and perm space doesn't leave enough room for native memory allocation. When this problem became manifest: was there a change of the OS or JVM version? Does the error occur after some other processing using similar procedures has been done, possibly without returning memory allocations? Insert a call new Deflater(Deflater.DEFAULT_COMPRESSION, true); and a logger call, preceding ZipOutputStream outputStream = new ZipOutputStream(baos); --- rule hangs here to narrow it down. -W On 31/10/2012, Davide Sottara dso...@gmail.com wrote: From your description, it does not seem a rule engine issue... Have you tried reproducing the problem outside the rule engine? I.e. invoking the ZipUtil in a more traditional context? And does it get stuck with ANY bytearray or just with that one particular input? -- View this message in context: http://drools.46999.n3.nabble.com/Noob-desperately-needing-help-tp4020589p4020592.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Noob desperately needing help
Wolfgang, Here's my dilemma...there is no exception thrown! I wouldn't even be here asking the question if I was getting an OOME...my problem is that the rule hangs, and from that point on, the entire rules engine is hung, even though other processing continues on that jboss node. Note that I'm using zip4j, as the default zip library provided in Java does not support password-protecting the zip file. That is a requirement of this process. And this is new code...it works perfectly outside the rules container, but not at all inside it. What baffles me is the process hanging...I've been writing Java code for 13 years, and I've never seen a process just hang... Paul -- View this message in context: http://drools.46999.n3.nabble.com/Noob-desperately-needing-help-tp4020589p4020615.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Noob desperately needing help
I was just about to suggest something similar. Use JDB or some other utility to get a thread dump from the JVM when it is hung. That should let you know exactly in what class and method the thread hangs. You could also change your code to catch (and rethrow) Throwable instead of Exception to double-check that the call to ZipOutputStream is not throwing an Error that is secretly caught somewhere without being logged. Regards, Mattias - Original Message - From: Esteban Aliverti esteban.alive...@gmail.com To: Rules Users List rules-users@lists.jboss.org Sent: Wednesday, 31 October, 2012 4:46:53 PM Subject: Re: [rules-users] Noob desperately needing help Did you try to debug your code to see exactly where the hung is? zip4j seems to be open source, you could even debug its internals to see where the problem is and maybe you can get a clue of what is going wrong. Best Regards, Esteban Aliverti - Blog @ http://ilesteban.wordpress.com On Wed, Oct 31, 2012 at 4:26 PM, zaphod pcoo...@emspic.org wrote: Wolfgang, Here's my dilemma...there is no exception thrown! I wouldn't even be here asking the question if I was getting an OOME...my problem is that the rule hangs, and from that point on, the entire rules engine is hung, even though other processing continues on that jboss node. Note that I'm using zip4j, as the default zip library provided in Java does not support password-protecting the zip file. That is a requirement of this process. And this is new code...it works perfectly outside the rules container, but not at all inside it. What baffles me is the process hanging...I've been writing Java code for 13 years, and I've never seen a process just hang... Paul ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Noob desperately needing help
Mattias (and Esteban)... Well.you guys gave me the solution to the problem, but in a wildly indirect way. I downloaded the source for zip4j, added a bunch of logging so I could figure out where the code was hanging, went to replace the existing library and.hmmm, where the heck IS the existing library? Long story short, was not including the zip4j.jar in the app classpath. Added the debug version, and, surprise, surprise, it worked. So, it turns out I should have been getting a ClassNotFound exception from the classloader. Not sure why drools would just stop and NOT throw a ClassNotFound exception, but that is no longer my concern. Thanks to everyone who participated in leading me to a solution...a typical false-positive error. And to Davideyou were right, not a Drools problem at all. It was the nut behind the keyboard (aka PEBKAC). Paul -- View this message in context: http://drools.46999.n3.nabble.com/Noob-desperately-needing-help-tp4020589p4020627.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Noob desperately needing help
I will provide some code, however: The rule that fails The runNeedleChestDecompressionReport method: And the method in the zip utility that fails (I'm using zip4j, as I need to password-protect the zip file): One additional useful pointif I remove the compression call (in other words, I skip the call to compress the file and just send the attachment as a CSV file, it works fine, and the rule completes. -- View this message in context: http://drools.46999.n3.nabble.com/Noob-desperately-needing-help-tp4020589p4020590.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Noob desperately needing help
Code posting failif you want to help, I guess go to the mailing list web site and read the codesigh -- View this message in context: http://drools.46999.n3.nabble.com/Noob-desperately-needing-help-tp4020589p4020591.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Noob desperately needing help
From your description, it does not seem a rule engine issue... Have you tried reproducing the problem outside the rule engine? I.e. invoking the ZipUtil in a more traditional context? And does it get stuck with ANY bytearray or just with that one particular input? -- View this message in context: http://drools.46999.n3.nabble.com/Noob-desperately-needing-help-tp4020589p4020592.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
