test_os extended attribute setxattr tests can fail with ENOSPC (Errno 28) #66210

Activity

1. Hibou57 commented on Jul 19, 2014

   

   Hibou57mannequin

   on Jul 19, 2014

   MannequinAuthor

   More actions

   make test fails with Python 3.4.1 on Ubuntu 12.04 Intel 32 bits.

   The single ./configure option used, was --prefix=$HOME/.local.

   As attached file, an archive containing both standard output and standard error outputs.

   Not some important error notifications appears only in standard output, not in standard error: “OSError: [Errno 28] No space left on device”.

   The latter is surprising as there was 11GiB free space.
2. Hibou57

   added

   buildThe build process and cross-buildThe build process and cross-build

   on Jul 19, 2014
3. ned-deily commented on Jul 20, 2014

   

   ned-deily

   on Jul 20, 2014

   Member

   More actions

   (In the future, please just show the test failures and their tracebacks rather than uploading a tar file.)

   The logs show three test failures in test_os:
   ======================================================================
   ERROR: test_fds (test.test_os.ExtendedAttributeTests)
   ----------------------------------------------------------------------

   Traceback (most recent call last):
     File "/home/yannick/c/src/Python-3.4.1/Lib/test/test_os.py", line 2238, in test_fds
       self._check_xattrs(getxattr, setxattr, removexattr, listxattr)
     File "/home/yannick/c/src/Python-3.4.1/Lib/test/test_os.py", line 2213, in _check_xattrs
       self._check_xattrs_str(str, *args, **kwargs)
     File "/home/yannick/c/src/Python-3.4.1/Lib/test/test_os.py", line 2202, in _check_xattrs_str
       setxattr(fn, s("user.test"), b"a"*1024, **kwargs)
     File "/home/yannick/c/src/Python-3.4.1/Lib/test/test_os.py", line 2231, in setxattr
       os.setxattr(fp.fileno(), *args)
   OSError: [Errno 28] No space left on device: 4

   ======================================================================
   ERROR: test_lpath (test.test_os.ExtendedAttributeTests)
   ----------------------------------------------------------------------

   Traceback (most recent call last):
     File "/home/yannick/c/src/Python-3.4.1/Lib/test/test_os.py", line 2223, in test_lpath
       os.listxattr, follow_symlinks=False)
     File "/home/yannick/c/src/Python-3.4.1/Lib/test/test_os.py", line 2213, in _check_xattrs
       self._check_xattrs_str(str, *args, **kwargs)
     File "/home/yannick/c/src/Python-3.4.1/Lib/test/test_os.py", line 2202, in _check_xattrs_str
       setxattr(fn, s("user.test"), b"a"*1024, **kwargs)
   OSError: [Errno 28] No space left on device: '@test_16527_tmp'

   ======================================================================
   ERROR: test_simple (test.test_os.ExtendedAttributeTests)
   ----------------------------------------------------------------------

   Traceback (most recent call last):
     File "/home/yannick/c/src/Python-3.4.1/Lib/test/test_os.py", line 2219, in test_simple
       os.listxattr)
     File "/home/yannick/c/src/Python-3.4.1/Lib/test/test_os.py", line 2213, in _check_xattrs
       self._check_xattrs_str(str, *args, **kwargs)
     File "/home/yannick/c/src/Python-3.4.1/Lib/test/test_os.py", line 2202, in _check_xattrs_str
       setxattr(fn, s("user.test"), b"a"*1024, **kwargs)
   OSError: [Errno 28] No space left on device: '@test_16527_tmp'

   ---

   Note that all three failures are on attempts to set a 1024-byte extended attributes on a /tmp file with os.setxattr(), a function which is just a wrapper around the Linux setxattr system call. "man 2 setxattr" documents that the call can fail with ENOSPC (Errno 28) if "there is insufficient space remaining to store the extended attribute". "man 5 attr", the overview of extended attribute support, notes that there are various kernel and file system specific limits on extended attributes, including length restrictions. So presumably there may be legitimate reasons why these tests could get ENOSPC on particular system configurations. It would be better if test_os anticipated such problems and passed those tests with a warning if ENOSPC is returned.

   http://man7.org/linux/man-pages/man2/setxattr.2.html
   http://man7.org/linux/man-pages/man5/attr.5.html
4. ned-deily

   added

   easy

   testsTests in the Lib/test dirTests in the Lib/test dir

   and removed

   buildThe build process and cross-buildThe build process and cross-build

   on Jul 20, 2014
5. ned-deily

   changed the title [-]“make test” fails with 3.4.1 on Ubuntu 12.04[/-] [+]test_os extended attribute setxattr tests can fail with ENOSPC (Errno 28)[/+] on Jul 20, 2014
6. bitdancer commented on Jul 20, 2014

   

   bitdancer

   on Jul 20, 2014

   Member

   More actions

   If "insuffcient space" is insufficient disk space (ie: /tmp is full), I don't see any reason the test should cater to that possibility. None of our other tests do. If it means something else, then nevermind.
7. ned-deily commented on Jul 20, 2014

   

   ned-deily

   on Jul 20, 2014

   Member

   More actions

   My reading of the man page is that in the xattr case it can refer to conditions other than just file system full, e.g. https://bugzilla.kernel.org/show_bug.cgi?id=12793. Also, Yannick reported that the volume was apparently not full.
8. vstinner commented on Jul 29, 2019

   

   vstinner

   on Jul 29, 2019

   Member

   More actions

   We don't have enough info to decide if we should ignore the error or not. I just close this old issue as out of date.
9. vstinner

   closed this as completedon Jul 29, 2019
10. ezio-melotti

    transferred this issue fromon Apr 10, 2022
11. terryjreedy

    closed this as not plannedon Nov 16, 2024
12. terryjreedy commented on Nov 16, 2024

    

    terryjreedy

    on Nov 16, 2024

    Member

    More actions

    #126909 continues this with more information.