BigApp crashed with the fastdebug build on (instanceKlass() == 0 || instanceKlass()->is_instance()), and it is always reproducible in couple of minutes but only with the following VM options. I have reproduced the crash in two other machines. VM options: "-server -XX:+UseConcMarkSweepGC -XX:+VerifyBeforeGC -XX:+VerifyAfterGC -XX:+VerifyDuringGC" Java version: build 1.6.0_01-b05 build 20070320194522.iv159533.gc_baseline.numa.adaptive-fastdebug hostname: jtg-lx50-2.sfbay logfile and core file location: /bt/atgrun.28785.-server crash seen: tail run.atg.out Unexpected Error ------------------------------------------------------------------------------ Internal Error at placeholders.cpp:221, pid=29188, tid=6 Error: guarantee(instanceKlass() == 0 || instanceKlass()->is_instance(),"checking type of instanceKlass result") How to reproduce: export JAVA_HOME=Your_JAVA_HOME it is set to /usr/j2se by default. then running: /bs/runatg.ksh <your_vm_options> look at the results under /bt directory. Changed App name to 'BigApp'
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