On 12/28/2015 11:19 PM, Terry Reedy wrote:
On 12/29/2015 1:50 AM, Glenn Linderman wrote:
Here's a sanatized stack trace off my web server:
File ".../cgihelpers.py", line 10, in
import cgitb
File ".../py34/lib/python3.4/cgitb.py", line 24, in
import inspect
File ".../py34/lib/python3.4/inspect.py", line 54, in
from dis import COMPILER_FLAG_NAMES as _flag_names
File "", line 2237, in _find_and_load
File "", line 2226, in _find_and_load_unlocked
File "", line 1200, in _load_unlocked
File "", line 1129, in _exec
File "", line 1467, in exec_module
File "", line 1570, in get_code
File "", line 656, in _compile_bytecode
EOFError: marshal data too short
It worked this morning, and does this now. I hadn't changed anything.
Since it crashes trying to unmarshal compiled dis bytecode, I would
assume that the .pyc file is corrupted and remove it. Based on the
above, it should be in
.../py34/lib/python3.4/__pycache__/dis.*.pyc
Python will then recompile dis and write a new .pyc file.
Thank you, thank you, thank you, thank you, thank you, thank you, thank
you, thank you, thank you, thank you, thank you, thank you, thank you,
thank you, thank you, thank you, thank you, thank you, thank you, thank
you, thank you, thank you, thank you, thank you, thank you, thank you,
thank you, thank you, thank you, thank you, thank you, thank you, thank
you, thank you, thank you, thank you, thank you, thank you, thank you,
thank you!
The site is working now, again. Thank you, again.
Because of the File "" lines, and the fact that there were recent
comments about frozen import stuff on python-dev, I was thinking that
the corruption was at a lower level, and never thought to zap a .pyc.
OK, so I actually renamed it instead of zapping it. Them, actually,
there were both .pyc and .pyo.
Now the __pycache__ directory is full of .pyc and .pyo files (from the
install? On April 19th? (the date on most of the files). But:
areli...@areliabledomain.com [~/py34/lib/python3.4/__pycache__]# ll dis*
-rw-r--r-- 1 areliabl areliabl 14588 Dec 29 00:27 dis.cpython-34.pyc
-rw-r--r-- 1 areliabl areliabl 8192 Dec 28 19:16 dis.cpython-34.pyc-xxx
-rw-r--r-- 1 areliabl areliabl 14588 Apr 19 2015 dis.cpython-34.pyo-xxx
(I renamed the existing .py* files by appending -xxx).
So we can see that somehow, today at 19:16 (probably UTC) the dis.*.pyc
file got chopped to 8192 bytes. That's a suspicious number, being a
power of 2... but... I haven't updated Python since originally
installing it on the web server, on April 19th. So why would _that_
.pyc file have today's date? Because of UTC, the replacement has
tomorrow's date :) But it seems like it should have had Apr 19 2015
like all the rest.
Except, all the rest don't have Apr 19 2015... most of them do, but
there are a fair number from today, and a couple from Dec 15 (listed
below). I don't quickly see any others that are suspiciously exactly a
power of 2!
But, under the assumption that the install created all these files in
the first place, why would _any_ of them have newer dates? I haven't
gone around deleting any .pyc files since April. And if they are
already there, why would Python rebuild them? Isn't the point of the
.pyc files to not need to recompile? And even if the original build
didn't build them, since I haven't touch the python sources on this web
server for months, shouldn't all the files be months old, at least?
And isn't it rather suspicious that of the ones that are rebuilt, that
all of them have exactly the same timestamp, rather than being sprinkled
around with different dates? Well, the two from Dec 15 have the same
time, and all the ones from today have the same time. But that doesn't
seem like some sort of "random error or access conflict accessing file
causing it to be rebuilt"....
Should I accuse my web host of playing with these files? Are they
backing up/restoring? Are they simply touching the files? Is their
infrastructure flaky such that whole groups of files get deleted now and
then (and either rebuilt or restored with a different date)?
areli...@areliabledomain.com [~/py34/lib/python3.4/__pycache__]# find
-mtime -240 -ls
113654924 20 drwxr-xr-x 2 areliabl areliabl 20480 Dec 29 00:27 .
113639463 76 -rw-r--r-- 1 areliabl areliabl 76650 Dec 28 19:16
./inspect.cpython-34.pyc
113639477 16 -rw-r--r-- 1 areliabl areliabl 14588 Dec 29 00:27
./dis.cpython-34.pyc
113639458 16 -rw-r--r-- 1 areliabl areliabl 12361 Dec 28 19:16
./ast.cpython-34.pyc
113639451 36 -rw-r--r-- 1 areliabl areliabl 32773 Dec 28 19:16
./shutil.cpython-34.pyc
113639468 12 -rw-r--r-- 1 areliabl areliabl 10371 Dec 28 19:16
./contextlib.cpython-34.pyc
113639469 16 -rw-r--r-- 1 areliabl areliabl 15916 Dec 28 19:16
./lzma.cpython-34.pyc
113639475 16 -rw-r--r-- 1 areliabl areliabl 15130 Dec 28 19:16
./bz2.cpython-34.pyc
113639486 68 -rw-r--r-- 1 areliabl areliabl 67747 Dec 28 19:16
./tarfile.cpython-34.pyc
113639479 68 -rw-r--r-- 1 areliabl areliabl 65875 Dec 28 19:16
./argparse.cpython-34.pyc
113639459 48 -rw-r--r-- 1 areliabl areliabl 45794 Dec 28 19:16
./zipfile.cpython-34.pyc
113639484 32 -rw-r--r-- 1 areliabl areliabl 31374 Dec 28 19:16
./platform.cpython-34.pyc
113639450 8 -rw-r--r-- 1 areliabl areliabl 4608 Dec 15 03:01
./copyreg.cpython-34.pyc
113639474 16 -rw-r--r-- 1 areliabl areliabl 13665 Dec 28 19:16
./textwrap.cpython-34.pyc
113639454 44 -rw-r--r-- 1 areliabl areliabl 43428 Dec 28 19:16
./subprocess.cpython-34.pyc
113639452 40 -rw-r--r-- 1 areliabl areliabl 39051 Dec 15 03:01
./threading.cpython-34.pyc
113639472 16 -rw-r--r-- 1 areliabl areliabl 12721 Dec 28 19:16
./gettext.cpython-34.pyc
113639470 8 -rw-r--r-- 1 areliabl areliabl 8060 Dec 28 19:16
./copy.cpython-34.pyc
113639467 8 -rw-r--r-- 1 areliabl areliabl 6370 Dec 28 19:16
./hashlib.cpython-34.pyc
113639483 12 -rw-r--r-- 1 areliabl areliabl 11461 Dec 28 19:16
./pprint.cpython-34.pyc
113639460 8 -rw-r--r-- 1 areliabl areliabl 7871 Dec 28 19:16
./string.cpython-34.pyc
113639478 32 -rw-r--r-- 1 areliabl areliabl 29697 Dec 28 19:16
./cgi.cpython-34.pyc
113639464 20 -rw-r--r-- 1 areliabl areliabl 17601 Dec 28 19:16
./pkgutil.cpython-34.pyc
113639453 8 -rw-r--r-- 1 areliabl areliabl 6437 Dec 28 19:16
./quopri.cpython-34.pyc
113639476 8 -rw-r--r-- 1 areliabl areliabl 8192 Dec 28 19:16
./dis.cpython-34.pyc-xxx
113639466 92 -rw-r--r-- 1 areliabl areliabl 90383 Dec 28 19:16
./pydoc.cpython-34.pyc
113639461 12 -rw-r--r-- 1 areliabl areliabl 8466 Dec 28 19:16
./_weakrefset.cpython-34.pyc
113639465 20 -rw-r--r-- 1 areliabl areliabl 19060 Dec 28 19:16
./random.cpython-34.pyc
areli...@areliabledomain.com [~/py34/lib/python3.4/__pycache__]#
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