[New-bugs-announce] [issue7361] Strange importlib error during test_multiprocessing failure

[R. David Murray]

New submission from R. David Murray <rdmurray at bitdance.com>:

One of the buildbots suffered a test_multiprocessing failure, which
itself is not such an unusual thing.  But the error that was
subsequently thrown looks like it might point to a place where
importlib's error handling could be improved.  The error that was thrown
certainly gives no clear indication of what really caused the problem.

The full buildbot report was:
http://www.python.org/dev/buildbot/all/builders/ia64%20Ubuntu%203.1/builds/93/steps/test/logs/stdio

Here are the tracebacks (the second one being the interesting one):

    Traceback (most recent call last):
      File
"/home/pybot/buildarea/3.1.klose-debian-ia64/build/Lib/multiprocessing/process.py",
line 233, in _bootstrap
        self.run()
      File
"/home/pybot/buildarea/3.1.klose-debian-ia64/build/Lib/multiprocessing/process.py",
line 88, in run
        self._target(*self._args, **self._kwargs)
      File
"/home/pybot/buildarea/3.1.klose-debian-ia64/build/Lib/test/test_multiprocessing.py",
line 1211, in _putter
        queue = manager.get_queue()
      File
"/home/pybot/buildarea/3.1.klose-debian-ia64/build/Lib/multiprocessing/managers.py",
line 644, in temp
        token, exp = self._create(typeid, *args, **kwds)
      File
"/home/pybot/buildarea/3.1.klose-debian-ia64/build/Lib/multiprocessing/managers.py",
line 544, in _create
        id, exposed = dispatch(conn, None, 'create', (typeid,)+args, kwds)
      File
"/home/pybot/buildarea/3.1.klose-debian-ia64/build/Lib/multiprocessing/managers.py",
line 79, in dispatch
        kind, result = c.recv()
      File
"/home/pybot/buildarea/3.1.klose-debian-ia64/build/Lib/multiprocessing/connection.py",
line 408, in recv
        s = self._conn.recv_bytes()
    IOError: [Errno 104] Connection reset by peer
    test test_multiprocessing failed -- Traceback (most recent call last):
      File
"/home/pybot/buildarea/3.1.klose-debian-ia64/build/Lib/test/test_multiprocessing.py",
line 1222, in test_rapid_restart
        queue = manager.get_queue()
      File
"/home/pybot/buildarea/3.1.klose-debian-ia64/build/Lib/multiprocessing/managers.py",
line 644, in temp
        token, exp = self._create(typeid, *args, **kwds)
      File
"/home/pybot/buildarea/3.1.klose-debian-ia64/build/Lib/multiprocessing/managers.py",
line 542, in _create
        conn = self._Client(self._address, authkey=self._authkey)
      File
"/home/pybot/buildarea/3.1.klose-debian-ia64/build/Lib/multiprocessing/connection.py",
line 427, in XmlClient
        import xmlrpc.client as xmlrpclib
      File
"/home/pybot/buildarea/3.1.klose-debian-ia64/build/Lib/importlib/_bootstrap.py",
line 151, in decorated
        return fxn(self, module)
      File
"/home/pybot/buildarea/3.1.klose-debian-ia64/build/Lib/importlib/_bootstrap.py",
line 399, in load_module
        return self._load_module(module)
      File
"/home/pybot/buildarea/3.1.klose-debian-ia64/build/Lib/importlib/_bootstrap.py",
line 324, in _load_module
        code_object = self.get_code(module.__name__)
      File
"/home/pybot/buildarea/3.1.klose-debian-ia64/build/Lib/importlib/_bootstrap.py",
line 411, in get_code
        pyc_timestamp = marshal._r_long(data[4:8])
      File
"/home/pybot/buildarea/3.1.klose-debian-ia64/build/Lib/importlib/__init__.py",
line 65, in _r_long
        x = int_bytes[0]
    IndexError: index out of range

----------
components: Library (Lib)
messages: 95511
nosy: brett.cannon, jnoller, r.david.murray
priority: low
severity: normal
stage: test needed
status: open
title: Strange importlib error during test_multiprocessing failure
type: behavior
versions: Python 3.1

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue7361>
_______________________________________