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copied!<p>There are a couple of those I can recollect, most of them caused by me :). Almost evey one of these needed lots of head scratching.</p> <ol> <li><p>I was part of a java project (rich client), the java code used to work well on vanilla builds or new machines without problem, but when installed on the presentation laptops,it suddenly stopped working and started throwing stackdump. Further investigation showed that the the code relied on a custom dll which has conflicting with cygwin. Thats not the end of the story, we were supposed to install it on 5 other machies and guess what, on one of the machines it again crashed! This time the culprit was the jvm, the code we gave was for built using Sun microsystems jdk and the machine had ibm's jvm.</p></li> <li><p>Another instance I can recollect has to do with a custom event handler code, The code was unit tested and verified, finally when I removed the print() statements, BOOM!!. When we debugged, the code ran perfectly adding to our owes. I had to resort to zen meditation (a nap on the desk) and it occured that there might be a temporal anamoly! The event we were delegating was triggering the function even before the condition was set, the print statements & debug mode gave enough time for the condition to be set and so worked properly. A sigh of relief and some refactoring solved the issue.</p></li> <li><p>One fine day I decided that some of the domain objects needed to implement Clonable interface, things were fine. After some weeks, we observed that the application started behaving wierdly. Guess what? we were adding these shallow copies to the collection classes and the remove() methods were not actually clearing the contents properly, (due to duplicate references pointing to the same object). This caused some serious model review and a couple of raised browes.</p></li> </ol>

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