[BProc] Re: [Clubmask-users] java libraries, LAM executables

[Nicholas H. <he...@se...>]

On Thu, 2003-07-24 at 18:46, Gregory Shakhnarovich wrote:
> Hi,
> 
> I am hoping someone has faced similar problems and know a solution. A bit
> of info: we run a 2.4.20-bproc Debian kernel, with Clubmask, on a 32 node
> cluster.
> 
> 1) Despite the fact that /etc/beowulf/config says, among others,
> 
> libraries /usr/lib/j2se/1.4/jre/lib/i386/libja*
> 
> When I try to run Java, I get:
> 
> [378] bourbaki:/root>bpsh 0 java --version
> Error: could not find libjava.so
> Error: could not find Java 2 Runtime Environment.
> 
> We have fixed similar problems with other libraris by adding them to
> 'config' and rebooting. But not this one. Anything special about it?

The java 'binary' is actually a shell script that uses $0 to find the
path to the java installation. Since bproc does a kinda funky shell
hack, this name does not get preserved, in fact it gets replaced with
'/proc/self/fd/3', and ofcourse there are no java libraries in that
directory tree.

I am attaching two file, a shell script and a C program.

The shell program you can use like:
bpsh 0 cmjava.sh /path/to/java arg1 arg2 ...

The C program gets compiled:
gcc -o cmjava javawrapper.c -lbproc

and run:
cmjava 0 /path/to/java arg1 arg2...

Let me know if either of these work for you -- and if not, a ton of
debugging information. If these end up working for your java needs, we
can include them in Clubmask.

Nic
-- 
Nicholas Henke
Penguin Herder & Linux Cluster System Programmer
Liniac Project - Univ. of Pennsylvania