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Groups > comp.lang.java.programmer > #22361

JNI, threads are still running after DestroyJavaVM()

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Hello all,

As the object of this thread suggests, the problem I encounter is that
in a minimalist test program, there are "ghost" threads after calling
DestroyJavaVM().
The environment is WIN32, JRE/JDK 1.6.0_21, and C++ (Visual Studio
2008).
Under certain circumstances, it prevents some processes from exiting
(ie: IIS7.5 Application Pool : w3wp.exe).
May be I'm doing something wrong or I forgot one step,
Here is the very simple code to reproduce the problem:

// testDestroyJavaVM.cpp : Defines the entry point for the console
application.
//

#include "stdafx.h"

#include <conio.h>

#include "jni.h"
#pragma comment(lib, "jvm.lib")

int _tmain(int argc, _TCHAR* argv[])
{
	printf("press key to start");
	getch();
	printf("\nstart.");
	int MAX = 1; // can't call JNI_CreateJavaVM() more than once for some
reason...
	for (int i=0; i<MAX; i++)
	{
		JavaVM* jvm = NULL;
		JNIEnv* env = NULL;
		do
		{
			JavaVMOption jvmOptions;
			JavaVMInitArgs vm_args;
			vm_args.version = JNI_VERSION_1_6;
			vm_args.nOptions = 0;
			vm_args.options = &jvmOptions;
			vm_args.ignoreUnrecognized = 1;

			// *** 1 thread before JNI_CreateJavaVM() ***
			int retcode = JNI_CreateJavaVM(&jvm, (void**)&env, &vm_args);
			// *** 9 threads after JNI_CreateJavaVM() ***
			if(retcode < 0)
			{
				printf("JNI_CreateJavaVM failed: %d\n", retcode);
				break;
			}
		}
		while (false);
		if (NULL != jvm)
			jvm->DestroyJavaVM();
		// *** 6 threads after DestroyJavaVM() ***
	}
	printf("\ndone.");
	getch();
	return 0;
} // END OF CODE

Does someone know how to fix this problem please?
Is it a known problem ?

Thanks in advance for any help,
Olivier.

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Thread

JNI, threads are still running after DestroyJavaVM() Olivier GROSSET-GRANGE <olivier@clickndecide.eu> - 2013-02-19 05:59 -0800
  Re: JNI, threads are still running after DestroyJavaVM() Arne Vajhoej <arne@vajhoej.dk> - 2013-02-19 12:44 -0500
    Re: JNI, threads are still running after DestroyJavaVM() olivier@clickndecide.eu - 2013-02-19 15:44 -0800

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