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VisualVM Java Profiler Causes Profiled JVM to Crash

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VisualVM is a tool that integrates several management and monitoring tools for local and remote Java applications including a Java profiler. The VisualVM profiler enable you to analyze CPU and memory usage of local Java applications.
When attaching the VisualVM profiler to a Java application which is running on Java 6, the profiler may cause the Java application to crash. To prevent this from happening, you need to turn off class sharing for the Java application. Any Java application can be start with class sharing turned off by starting the application with the -Xshare:off argument.