Red Hat Bugzilla – Bug 685234
multiprocessing.Process.start() fails occasionally
Last modified: 2014-01-12 18:52:33 EST
It seems that forking._cleaup() calls Popen.poll() which tests for self.returncode, but then self.pid may be collected by another .poll() and refer to a nonexistent pid.
MainThread::ERROR::2011-03-14 18:02:48,144::sp::548::Storage.StoragePool::(reconnect) RECONNECT: Failed: 1cceaba4-2aec-45fe-b4f7-eac35299698d
Traceback (most recent call last):
File "/usr/share/vdsm/storage/sp.py", line 546, in reconnect
return self.connect(hostId, scsiKey, msdUUID, masterVersion)
File "/usr/share/vdsm/storage/sp.py", line 434, in connect
File "/usr/share/vdsm/storage/sdf.py", line 132, in refresh
File "/usr/share/vdsm/storage/sdc.py", line 114, in refresh
File "/usr/share/vdsm/storage/misc.py", line 1028, in helper
return sm(*args, kwargs)
File "/usr/share/vdsm/storage/misc.py", line 1015, in call
self.lastResult = self.func(*args, kwargs)
File "/usr/share/vdsm/storage/sdc.py", line 140, in _refreshDomains
File "/usr/share/vdsm/storage/nfsSD.py", line 146, in getFileStorageDomainList
File "/usr/share/vdsm/storage/fileSD.py", line 87, in init
if not oop.fileUtils.pathExists(self.metafile):
File "/usr/share/vdsm/storage/processPool.py", line 35, in wrapper
return self.runExternally(func, *args, kwds)
File "/usr/share/vdsm/storage/processPool.py", line 54, in runExternally
helper = Helper()
File "/usr/share/vdsm/storage/processPool.py", line 102, in init
File "/usr/lib64/python2.6/multiprocessing/process.py", line 99, in start
File "/usr/lib64/python2.6/multiprocessing/process.py", line 53, in _cleanup
if p._popen.poll() is not None:
File "/usr/lib64/python2.6/multiprocessing/forking.py", line 106, in poll
pid, sts = os.waitpid(self.pid, flag)
OSError: [Errno 10] No child processes
Since RHEL 6.1 External Beta has begun, and this bug remains
unresolved, it has been rejected as it is not proposed as
exception or blocker.
Red Hat invites you to ask your support representative to
propose this request, if appropriate and relevant, in the
next release of Red Hat Enterprise Linux.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.