Re: strange 32bit apache-problem

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Hello,

Am 15.09.2014 um 11:57 schrieb Fiedler Roman:
Hi,

Von: Hajo Locke [mailto:Hajo.Locke@xxxxxx]

Hello,

one of my machines i upgraded tu ubuntu 14.04 32bit.
there is a apache 2.2.27 running on it (non ubuntu-repo).
i have a textfile which is 512byte long, it contains just some chars,
just one long line with a linebreak at the end.

If i request this file by wget from the same machine, all is looking
fine and readable.
If i request this file from a other machine, then file seems to be
corrupted. response-header and filesize are still ok. file contents
looks like i would have requested some binary content.
content looks like this (just first 8 bytes):
^@^@^@^@

if i reduce length of line, then at a point file is ok again and
readable. What could be the problem here?
Other files with shorter lines are also ok. it seems to be special in
here, that file is very long and only one linebreak at the end
i have other machines which are upgraded the same way with same
software, only difference is that they are 64bit machines and they are
working without problems.
Never had something like this, some other not upgraded 32bit machines
still have no problem with original file.

What to do now?
Did you look at it in an editor? If yes, editors might be tricky.

Could you post xxd of original file, file retrieved locally and on remote
machine?

Roman
i used different editors, graphical or text. display is different, but in all cases corrupt.
for testing i created a 512byte file containing a lot of a's
i post xxd of files. first one is the file a.html retrieved from same machine which is ok:


0000000: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
0000010: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
0000020: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
0000030: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
0000040: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
0000050: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
0000060: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
0000070: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
0000080: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
0000090: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
00000a0: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
00000b0: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
00000c0: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
00000d0: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
00000e0: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
00000f0: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
0000100: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
0000110: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
0000120: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
0000130: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
0000140: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
0000150: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
0000160: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
0000170: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
0000180: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
0000190: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
00001a0: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
00001b0: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
00001c0: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
00001d0: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
00001e0: 6161 6161 6161 6161 6161 6161 6161 6161  aaaaaaaaaaaaaaaa
00001f0: 6161 6161 6161 6161 6161 6161 6161 610a  aaaaaaaaaaaaaaa.



now comes xxd of same file retrieved by an other client:

0000000: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000010: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000020: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000030: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000040: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000050: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000060: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000070: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000080: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000090: 0000 0000 0000 0000 0000 0000 0000 0000  ................
00000a0: 0000 0000 0000 0000 0000 0000 0000 0000  ................
00000b0: 0000 0000 0000 0000 0000 0000 0000 0000  ................
00000c0: 0000 0000 0000 0000 0000 0000 0000 0000  ................
00000d0: 0000 0000 0000 0000 0000 0000 0000 0000  ................
00000e0: 0000 0000 0000 0000 0000 0000 0000 0000  ................
00000f0: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000100: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000110: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000120: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000130: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000140: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000150: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000160: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000170: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000180: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000190: 0000 0000 0000 0000 0000 0000 0000 0000  ................
00001a0: 0000 0000 0000 0000 0000 0000 0000 0000  ................
00001b0: 0000 0000 0000 0000 0000 0000 0000 0000  ................
00001c0: 0000 0000 0000 0000 0000 0000 0000 0000  ................
00001d0: 0000 0000 0000 0000 0000 0000 0000 0000  ................
00001e0: 0000 0000 0000 0000 0000 0000 0000 0000  ................
00001f0: 0000 0000 0000 0000 0000 0000 0000 0000  ................

it seems to work when line in file is exactly 255 byte long. this retrieved file looks good. if i edit the file and add one more a then i get the rubbish at next request.

Do you have an idea whats going wrong?

Thanks,
Hajo




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