Issue16139
Created on 2012-10-04 23:53 by andrewjcg, last changed 2022-04-11 14:57 by admin. This issue is now closed.
| Messages (6) | |||
|---|---|---|---|
| msg172029 - (view) | Author: Andrew Gallagher (andrewjcg) | Date: 2012-10-04 23:52 | |
This occurs when python is installed on a read-only mount AND all the .pyc files are out-of-date. Therefore, when python starts and attempts to write a new .pyc file, _write_atomic in "Lib/importlib/_bootstrap.py" throws an OSError with an errno of EROFS, which is not handled (and ignored) and kills the interpreter. $ python Fatal Python error: Py_Initialize: Unable to get the locale encoding Traceback (most recent call last): File "<frozen importlib._bootstrap>", line 1558, in _find_and_load File "<frozen importlib._bootstrap>", line 1525, in _find_and_load_unlocked File "<frozen importlib._bootstrap>", line 586, in _check_name_wrapper File "<frozen importlib._bootstrap>", line 1023, in load_module File "<frozen importlib._bootstrap>", line 1004, in load_module File "<frozen importlib._bootstrap>", line 562, in module_for_loader_wrapper File "<frozen importlib._bootstrap>", line 854, in _load_module File "<frozen importlib._bootstrap>", line 990, in get_code File "<frozen importlib._bootstrap>", line 1051, in _cache_bytecode File "<frozen importlib._bootstrap>", line 1074, in set_data File "<frozen importlib._bootstrap>", line 128, in _write_atomic OSError: [Errno 30] Read-only file system: '<read-only-mount-path>/lib/python3.3/encodings/__pycache__/__init__.cpython-33.pyc.139872939267056' Aborted (core dumped) The following (hacky) patch fixes the issue for me: --- a/Python-3.Lib/importlib/_bootstrap.py +++ b/Python-3.Lib/importlib/_bootstrap.py @@ -1070,6 +1070,10 @@ class SourceFileLoader(FileLoader, SourceLoader): # If can't get proper access, then just forget about writing # the data. return + except OSError as e: + if e.errno != 30: # ignore EROFS + raise + return try: _write_atomic(path, data, _mode) _verbose_message('created {!r}', path) @@ -1077,6 +1081,9 @@ class SourceFileLoader(FileLoader, SourceLoader): # Don't worry if you can't write bytecode or someone is writing # it at the same time. pass + except OSError as e: + if e.errno != 30: # ignore EROFS + raise |
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| msg172032 - (view) | Author: STINNER Victor (vstinner) *  |
Date: 2012-10-05 00:16 | |
Python 3.2 logs an error to stderr (if Python is started in verbose mode) if the directory and/or the pyc file cannot be created, and continue.
#ifdef MS_WINDOWS
if (_mkdir(cpathname) < 0 && errno != EEXIST) {
#else
if (mkdir(cpathname, dirmode) < 0 && errno != EEXIST) {
#endif
*dirpath = saved;
if (Py_VerboseFlag)
PySys_WriteStderr(
"# cannot create cache dir %s\n", cpathname);
return;
}
*dirpath = saved;
fp = open_exclusive(cpathname, mode);
if (fp == NULL) {
if (Py_VerboseFlag)
PySys_WriteStderr(
"# can't create %s\n", cpathname);
return;
}
|
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| msg172033 - (view) | Author: Antoine Pitrou (pitrou) * |
Date: 2012-10-05 00:21 | |
Hmm... I guess maybe we should trap all OSErrors after all (and print the error when in verbose mode). |
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| msg172049 - (view) | Author: Charles-François Natali (neologix) * |
Date: 2012-10-05 05:52 | |
> Hmm... I guess maybe we should trap all OSErrors after all (and print the error when in verbose mode). Yes. |
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| msg172062 - (view) | Author: Richard Oudkerk (sbt) * |
Date: 2012-10-05 09:09 | |
This is more or less a duplicate of #15833 (although the errno mentioned there is EIO instead of the more sensible EROFS). |
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| msg172118 - (view) | Author: Charles-François Natali (neologix) * |
Date: 2012-10-05 19:18 | |
> This is more or less a duplicate of #15833 Indeed, closing as duplicate. |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:57:36 | admin | set | github: 60343 |
| 2012-10-05 19:18:36 | neologix | set | status: open -> closed superseder: most failures to write byte-compiled file no longer suppressed messages: + msg172118 type: crash -> behavior |
| 2012-10-05 09:09:32 | sbt | set | nosy:
+ sbt messages: + msg172062 |
| 2012-10-05 05:52:07 | neologix | set | messages: + msg172049 |
| 2012-10-05 00:21:34 | pitrou | set | nosy:
+ neologix, pitrou messages: + msg172033 |
| 2012-10-05 00:16:30 | vstinner | set | nosy:
+ vstinner messages: + msg172032 |
| 2012-10-04 23:57:37 | r.david.murray | set | nosy:
+ brett.cannon type: behavior -> crash |
| 2012-10-04 23:53:00 | andrewjcg | create | |