New submission from lvroyce:
We create our customised manager which will fork child process with
baseManager. Because we registered SIGCHLD to reap the zombie for manager, we
found this causes baseManager raise RemoteError when called twice.(Test script
attached.)
After look at baseManager.py we found recv() in handling the request has been
interrupted by comming SIGCHLD, not retry recv(), but raise to client side
directly.
try:
methodname = obj = None
request = recv()<------------------this line been interrupted
by SIGCHLD
ident, methodname, args, kwds = request
obj, exposed, gettypeid = id_to_obj[ident]
if methodname not in exposed:
raise AttributeError(
'method %r of %r object is not in exposed=%r' %
(methodname, type(obj), exposed)
)
function = getattr(obj, methodname)
try:
res = function(*args, **kwds)
except Exception, e:
msg = ('#ERROR', e)
else:
typeid = gettypeid and gettypeid.get(methodname, None)
if typeid:
rident, rexposed = self.create(conn, typeid, res)
token = Token(typeid, self.address, rident)
msg = ('#PROXY', (rexposed, token))
else:
msg = ('#RETURN', res)
except AttributeError:
if methodname is None:
msg = ('#TRACEBACK', format_exc())
else:
try:
fallback_func = self.fallback_mapping[methodname]
result = fallback_func(
self, conn, ident, obj, *args, **kwds
)
msg = ('#RETURN', result)
except Exception:
msg = ('#TRACEBACK', format_exc())
except EOFError:
util.debug('got EOF -- exiting thread serving %r',
threading.current_thread().name)
sys.exit(0)
except Exception:<------does not handle IOError,INTR here should
retry recv()
msg = ('#TRACEBACK', format_exc())
----------
files: fakesupervdsm.py
messages: 181074
nosy: lvroyce
priority: normal
severity: normal
status: open
title: baseManager serve_client() not check EINTR when recv request
type: behavior
versions: Python 3.3
Added file: http://bugs.python.org/file28930/fakesupervdsm.py
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Python tracker <[email protected]>
<http://bugs.python.org/issue17097>
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