Ansible: Some problems with modules【raw】

When I was using modules of raw,
Some servers do not automatically stop tasks。
Have you ever been in a similar situation?

ansible server:SUSE Linux Enterprise Server 11 SP4 (x86_64)
ansible version:1.7.2

Problematic server:AIX 6.1

Problem Description:
Timeout is the default, nor does it occur every time, occasionally.
Use command or shell module,
will not be the problem,
but the client is not necessarily
installed python,
it can only use raw.

If you need additional information,
please explain that I will provide.