Tomcat does not "block" multi threading. There is not such thing i think in the JVM anyway, so i don't see how it could prevent your native code from creating threads. When you say you are having same call without tomcat, you mean in a spearate jvm, using the same jni libraries? Maybe you are just misuing your system library? Or not calling it at all? There is not restriction in JNI that rpevent multiple thread to call native code, nor is it restriction as to what thread natvie code create. It can even create java threads as far a i know!

Claire Dugenet a écrit :
Hello,



I realize a web application using Struts with Tomcat. In this application, I
call a DLL (created with JNI) which call an other DLL (in language C). The
last one is in the directory "system32" of windows et it use several
threads.



There is no error but according to the log files, no thread are called. I
have call the same DLLs without Tomcat, and it works.


Does Tomcat block the multi-threading ? Is there a solution to authorize the
multi-threading ?

Thanks,
Claire.



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