Hi, Mark,
First, you might want to check out Sheng Liang's excellent book on JNI,
titled "The Java Native Interface". Also, Nathan Meyers' book, "Java
Programming on Linux" is an excellent resource for Linux-specific Java
programming questions, and (I think) includes a chapter or two covering
JNI and Linux-specific gotchas.
Between the two of those, you should have just about all your JNI
questions covered! :)
--Jeff
Mark Delafranier wrote:
>
> Java Linux Buffs:
>
> I have a mutli-threaded application using pthreads, RedHat 6.1, gcc 2.91.66,
> libc 2.1.2. This is a standard RedHat 6.1 install with no patches or upgrades.
>
> I have searched through the www.blackdown.org faqs on using JNI and I did not
> find anything helpfull for this problem.
>
> I application spawns various threads to deal with client requests, like a web
> server would spawn threads to deal with http requests. The main process
> performs the JNI_CreateJavaVM() which succeeds.
>
> When a thread is started it issues an AttachCurrentThread and then proceeds with
> its work. I am finding that this method succeeds for 4 threads and then blocks
> for other threads.
>
> Its like AttachCurrentThread is hanging or blocked on mutex of some sort. The
> same code works under Solaris and NT.
>
> Is there a limit to the number of threads that can be attached to the VM?
>
> BTW: I believe I have everything setup so that the vm properly uses
> native_threads.
>
> Any suggestions?
>
> Thanks
> Mark DeLaFranier.
>
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--
Jeff Galyan
http://www.anamorphic.com
http://www.sun.com
jeffrey dot galyan at sun dot com
talisman at anamorphic dot com
Sun Certified Java(TM) Programmer
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