can I run both 32bits and 64bits Java on the same server

[shaobinxu]

I have a Hp-ux server, one BEA weblogic server running on 32bits JVM with PA_RISC2.0; now I try to start another java application on this server, but want to use PA_RISC2.0W (64bits) to improve performance, is there any problems? or any errors in my description? As I know I should
ln -s /opt/java1.4/jre/lib/PA_RISC2.0W/*.sl /usr/lib/pa20_64
and
ln -s /opt/java1.4/jre/lib/PA_RISC2.0W/hotspot/*.sl /usr/lib/pa20_64
, but some *.sl files in PA_RISC2.0W and PA_RISC2.0 are the same? so, anyone can give some advice?

[Arunvijai_4]

Hi,

Yes, You can run both 32 bit and 64 bit JVM on same machine without any issues. You use java from /opt/java1.4/bin/PA_RISC2.0W/java which is ELF-64 executable object file - PA-RISC 2.0 (LP64)


-Arun

[shaobinxu]

But when I try to run java under PA_RISC2.0W, an error occured as following:
$./java -version
/usr/lib/pa20_64/dld.sl: Unable to find library 'libjvm.sl'.
Killed
$pwd
/opt/java1.4/jre/bin/PA_RISC2.0W

does that mean I should do some soft link of libjvm.sl, so comes the problem, PARISC_2.0 and PARISC_2.0W both have libjvm.sl, how to solve this problem? thanks for your reply

[Arunvijai_4]

Hi,

You can link /opt/java1.4//jre/lib/PA_RISC2.0W/server/libjvm.sl
to /usr/lib/pa20_64

-Arun

[shaobinxu]

You can link /opt/java1.4//jre/lib/PA_RISC2.0W/server/libjvm.sl
to /usr/lib/pa20_64

Hi, Arun,
Will this link from 64bits have any impact on 32bits JVM running? Have you tried this before? Thanks.

[Arunvijai_4 · Accepted solution]

Hi,

64 bit JVM will run as a separate process. So, I dont think it will affect 32 bit JVM.

-Arun

[shaobinxu]

understand, its soft link only, not overwrite; I made such a mistake.
Thank you so much.

[shaobinxu]

Thanks Arun!