It seams you find the problem, I'll try your patch and give you some
feedback.
Thanks a lot for your research, nice job!
Regards,
Ezequiel
El 31/08/2010 08:03 p.m., TJ Saunders escribió:
>> [libssh2] 2.676521 Failure Event: -29 - compress/decompression failure
>> [libssh2] 2.676537 Failure Event: -1 - transport read
>> [libssh2] 2.676547 Failure Event: -21 - Read part of packet
>> [libssh2] 2.676558 Failure Event: -1 - Timeout waiting for status message
>>
>> And there, I think, is a sign of the issue:
>>
>> [libssh2] 2.676521 Failure Event: -29 - compress/decompression failure
>>
>> The question is, though: why did the decompression fail? And why does it
>> fail at this point, when reading file data (as opposed to earlier, when
>> decompressing the rest of the messages on that subsystem/channel)?
>>
>> I'll keep poking at this to see if I can find any additional clues...
> I patched the src/comp.c file (see first attached patch) to try to get
> more information; in my particular use case, I saw:
>
> [libssh2] 3.316516 Transport: unhandled zlib error -5
>
> According to the zlib.h header, a return value of -5 is Z_BUF_ERROR, which
> indicates (in the case of calling the inflate() zlib function) that there
> isn't enough space in the output buffer for the decompressor to make any
> progress.
>
> That being the case, I tried increasing the size of the output buffers
> used for zlib decompression (see second attached patch), and things looked
> much better. I'm not sure of just what the best increase in output buffer
> sizes/growth factors should be, though.
>
> Cheers,
> TJ
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> We are ashamed of everything that is real about us; ashamed of
> ourselves, of our relatives, of our incomes, of our accents, of
> our opinions, of our experience, just as we are ashamed of our
> naked skins.
>
> -George Bernard Shaw
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
>
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Received on 2010-09-01