when java exec sh script, we should redirect the error stream to log

[heziai]

When java exec sh script, we should redirect the error stream to log. So we can know the real reason about the error.

[heziai]

Fix the problem that the shell process cannot be force stopped: 699145c , the process's children should be killed firstly, then kill the process. Or else, the apache exec thread maybe blocked at streams.stop();, because the children is still running, so the streams cannot be closed.