topic Re: idle Java processes fail to respond under ARIES in Operating System - HP-UX

idle Java processes fail to respond under ARIES

Raymond E. Lilly — Thu, 02 Apr 2009 15:16:38 GMT

I am testing a PA-RISC application with ARIES on a new, fully patched B.11.31 U ia64 server. The first roadblock I run into is with hung Java processes. The processes start fine, but once the application sits idle for a few hours the java processes don't respond. By "don't respond" I mean I can no longer stop/start or query them with the application like I can before they sat idle.

On the PA-RISK platform this application runs with either the Java 1.3 version that gets installed along with the application (a Progress Software Company application) or the Java1.3 found in /opt.

I've tried everything on the Itanium machine that I can think of, including NFS mounts to the PA-RISC java1.3 binaries. No luck. A query request either hangs and does nothing or hangs, pegs a CPU at 100% and does nothing. I've also tried running the application with the Itanium's java1.4, but the application won't even start (Error accessing message #7021956244000743775).

It appears that ARIES emulation fails to maintain the necessary Java code after a period time. There are several Aries/jvm related posts that appear to touch on similar issues. Are there any workarounds or troubleshooting tricks I can try?

Re: idle Java processes fail to respond under ARIES

Steven E. Protter — Thu, 02 Apr 2009 15:36:33 GMT

Shalom,

go to http://www.hp.com/go/java and install the latest java release that will work.

Don't run java over NFS.

Make sure recommended java patches are installed from the above website.

Consider re-compiling your application native, because AIRES in real world tests exacts a 70% performance penalty.

SEP

Re: idle Java processes fail to respond under ARIES

Raymond E. Lilly — Thu, 02 Apr 2009 17:16:57 GMT

The latest java release that will work for this application is JVM1.3.1 but this version is not available on the Itanium. Is there another way to accomplish this?

Re: idle Java processes fail to respond under ARIES

Deepak Sreedhar — Mon, 06 Apr 2009 06:48:30 GMT

Please raise a support call with HP response center to troubleshoot rhe same. Thanks.

Re: idle Java processes fail to respond under ARIES

Raymond E. Lilly — Fri, 17 Apr 2009 12:34:40 GMT

Thanks to all who replied.

After further testing I was able to find a PA-RISC Java that did not hang in my specific ARIES environment. Unfortunately it's a higher version than my application can use. I'll take this one up with HP technical support.

For reference - in order to test several versions in succession I found it easiest to install / patch Java directly on PA-RISC to the version I wanted and just copy the install folder over to the Itanium machine.

The first one I found that did not hang with ARIES was java version "1.4.2.09", but YMMV.

Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2.09-050713-03:34)
Java HotSpot(TM) Server VM (build 1.4.2 1.4.2.09-050713-05:46-PA_RISC2.0 PA2.0 (
aCC_AP), mixed mode)