too many open files - together with ProcessBuilder

Hello,

I'm going to process a bunch of files (few thousands) and I call external tools for that.
The places where I open a file for reading or writing, I use close in the finally section.

I also use close on the InputReader, I use for getting the output from the called tool.

How can I find out, what breaks my code?
Do I need to call gc or something else?

Are there side-effects of the ProcessBuilder, that I did not cared about?

Any hint is appreciated.

kind regards
Reinhard

If you are exec()ing the "external tools" then it may be that you are not consuming the stdErr output of the Process.

As I understand it, a stdErr output stream is always created - perhaps that is showing up as an open file?

In any case, carefully read the java.lang.Process JavaDocs.

Bill