Forums | Admin Discussion Forums: help Start New Thread Nested Flat Threaded Ultimate Show 25 Show 50 Show 75 Show 100   By: arton Tajima RE: unloading the jvm throws errors [ reply ]   2013-01-10 12:10 Thanks for your comment. It's not bad to warn message, or I think replacing no-op or raising NotImplementedError instead of releasing java class proxies. By: Alex Porras RE: unloading the jvm throws errors [ reply ]   2013-01-09 17:34 Hello, Thank you for your response. I have read the link you provided and did some searching online, and it looks like I have nothing useful I can offer as an alternative, other than perhaps catching an exception on close and printing a custom message to allude to the fact that the problem stems from JNI. What do you think? Cheers, Alex By: arton Tajima RE: unloading the jvm throws errors [ reply ]   2013-01-08 09:54 Hi I've implemented Rjb::unload, but JVM/JRE doesn't support the feature according with http://docs.oracle.com/javase/7/docs/technotes/guides/jni/spec/invocation.html#destroy_java_vm. The document says "The JDK/JRE still does not support VM unloading, however". So sadly, when calling Rjb::unload, JVM was dettached from the thread, but it doesn't unload, so the only result is : can't create jvm (becaues it still remains in the process). I'll hope to hear your comment about what Rjb shoud do ? By: Alex Porras unloading the jvm throws errors [ reply ]   2013-01-07 23:43 I am using RJB to run some java code from a third party jar. The code runs as expected. However, there seems to be a memory leak somewhere between the java code and the local ruby code. Long term, I may go as far as profiling the Java code in segregation to see if the cause is there. Short term, I was wondering if it was possible to unload the JVM on demand? I tried invoking Rjb::unload after running the code in the jar file I needed, but it throws errors, usually along the lines of not being able to call "close()" on certain objects, which varied randomly on each execution. On occasions where Rjb::unload did work, subsequent Rjb::load calls would fail with "can't create Java VM" errors. Any help would be appreciated. Thanks! -- version info: mac os x mountain lion, 10.8.2 java version "1.6.0_37" Java(TM) SE Runtime Environment (build 1.6.0_37-b06-434-11M3909) ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin12.2.0]