running shell_exec gives error that I don't get when typing on command line

[allasso]

Hi,

I don't know if this is a Java problem, PHP problem, or server problem, but I thought I would look here:

On server, I can ssh and run command 'java -version' and outputs version okay.

Run shell_exec('java -version') in PHP script and I get this error:

Error occurred during initialization of VM
Could not reserve enough space for object heap

Any ideas?

Server is running Debian squeeze