topic Java ServerSocket close() hang in Operating System - HP-UX

Java ServerSocket close() hang

Chamitha Wijesekera — Tue, 18 Jun 2002 14:33:45 GMT

Hi, the Java class ServerSocket, close() method seems to hang on HP-UX in my application. The socket exists and I can print out its details immidiately prior to the close() command. However the close() command seems to hang the application but at times it completes after more than 45 min! The same code works fine on Win2K.
Any idea why this might be?

I'm using HP-UX 11.i and JDK version 1.3.1.05. Thanks!

Re: Java ServerSocket close() hang

Pierrick herve — Wed, 19 Jun 2002 08:14:57 GMT

you should test the option :
-XdoCloseWithReadPending

Re: Java ServerSocket close() hang

Chamitha Wijesekera — Wed, 19 Jun 2002 13:25:23 GMT

Is that option used when executing javac or the java command?

Re: Java ServerSocket close() hang

Chamitha Wijesekera — Wed, 19 Jun 2002 15:11:27 GMT

I added the -XdoCloseWithReadPending option when invoking the java command. However I still get the issue where my socket closer() hangs

Re: Java ServerSocket close() hang

Pierrick herve — Thu, 20 Jun 2002 12:44:04 GMT

yes this option is for the "java" command. Did you have a java exception error ?

is it the same with the option ?

it's maybe a socket problem.

try to install :

PHKL_25233 : 80 Kb, 700_800 11.11 select(2) and poll(2) hang
PHKL_25389 : 210 Kb, 700_800 11.11 Core PM, vPar, Psets Cumulative Patch
PHKL_25871 : 90 Kb, 700_800 11.11 eventport syscalls;socket close(2) hang fix
PHNE_25644 : 5800 Kb, 700_800 11.11 cumulative ARPA Transport patch
PHNE_26728 : 1760 Kb, 700_800 11.11 Cumulative STREAMS Patch
# Total : 7940 Kb, 5 patches

theese 5 patches are interdependants so you have to install them together.

regards,
Pierrick

Re: Java ServerSocket close() hang

Pierrick herve — Thu, 20 Jun 2002 12:50:09 GMT

you can find the information on this option on :
http://www.hp.com/products1/unix/java/infolibrary/prog_guide/java1_3/hot
spot.html#-XdoCloseWithReadPending

regards,
Pierrick

Re: Java ServerSocket close() hang

Chamitha Wijesekera — Thu, 20 Jun 2002 16:03:58 GMT

Hi, I think adding the socket close hanging patch made it work fine! That was the exact issue I was having. There were some other patches that it was dependent on though. When I added them too eveything seemed to work ok. Thanks a LOT man!!