fd_poll.poll() sometimes fail with:
Exception in thread Thread-1:
Traceback (most recent call last):
  File "/usr/lib64/python2.5/threading.py", line 460, in __bootstrap
    self.run()
  File "/usr/lib64/ganglia/python_modules/tcpconn.py", line 252, in run
    poll_events = fd_poll.poll()
error: (4, 'Interrupted system call')

which stops the module from working until a gmond restart.

Created an attachment (id=149) [details]
patch against trunk

Since readlines() is blocking there is no point to use poll (especially without
a timeout). I also added a check to run time.sleep(_refresh_rate) only if we
aren't shutting down. It speeds up gmond -m at least.

can you also reproduce this bug in trunk without your patch?
what is triggering the "Interrupted system call" from poll()?
which version of python (2.5.?) and architecture (x86_64?)

Committed revision 1621 for trunk

Committed revision 1645 for 3.1