How to close a Process and having shutdown hooks called ? (original) (raw)

Krystal Mok rednaxelafx at gmail.com
Tue Mar 4 11:51:27 UTC 2014

Hi Nicolas,

Looks like a well discussed question. On Posix systems, SIGTERM should work for you. That's the default signal sent by the 'kill' command on Linux. e.g. please take a look here: http://stackoverflow.com/questions/2541597/how-to-gracefully-handle-the-sigkill-signal-in-java

On Tue, Mar 4, 2014 at 2:45 AM, LE PICARD NICOLAS <N.LEPICARD at chu-tours.fr>wrote:

Hello everyone !

I looked for the answer in this list and did not find anything relevant. I don't know it it's possible to close a Process et call shutdown hooks automatically. I looked into the code and found it was not possible (in jdk7). When we call destroy() on a Process, it will call terminateProcess of ProcessImpl class. This link shows that a TerminateProcess < kills > the process and WHCBT hooks are NOT called. http://msdn.microsoft.com/en-us/library/windows/desktop/ms686722(v=vs.85).aspx Calling exitProcess (instead of TeminateProcess) seems to be dangerous ... but I don't understand why (ok, dlls could be locked, but when you do a CTRL +C it calls an exitProcess... so what's the problem ???) So I ask < how can we close a process, with the hooks called ? >. My knowledge is way smaller than people on openjdk... so I hope someone has an answer or a workaround. Byte the way, I looked for sending signals (SIGINT for Windows, SIGKILL for linux etc) to close a process. Maybe I'm wrong, but a solution could be to add to ProcessImplmd.c : #include <signal.h>

JNIEXPORT jboolean JNICALL JavajavalangProcessImplCloseHandleWithHooks(JNIEnv *env, jclass ignored, jlong handle) { raise(SIGINT) ; } I think,it will call an ExitProcess so ... dangerous or not ? Of course, we have to add also a function in ProcessImpl and make call available from Process through an abstract function like < close() > Any clever thoughts on this subject (I'm sure it is a common problem...) ? Thanks :) Regards. Nicolas Le Picard

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