On 2024-08-13 09:53, Matus UHLAR - fantomas wrote:
On 2024-08-09 09:03, Matus UHLAR - fantomas wrote:
FTR, I sent the info privately, but we can continue
discussing/solving it here.
maybeMakeSpaceAvailable: request buffer full:
client_request_buffer_max_size=524288
ReadNow: ... size 0, retval 0, errno 0
terminateAll: 1/1 after ERR_CLIENT_GONE/WITH_CLIENT
On 09.08.24 09:51, Alex Rousskov wrote:
AFAICT, you are suffering from a Squid bug that goes back to 2015
commit 4d1376d7 (that was fixing Squid bug 4206) or even earlier
code. Red flags were raised back in 2015, but nobody followed
through. We need to refactor
Server::maybeMakeSpaceAvailable()-related code to fix this bug.
FWIW, we did similar work for Squid-to-peer communication in commit
cc8b26f9 and commit 50c5af88. Similar principles should apply to
client-Squid communication. Unfortunately, I do not have enough free
time to volunteer to fix this client-Squid bug now.
At the expense of using more memory for some upload cases, you may be
able to work around the bug in some (but not all!) cases by making
client_request_buffer_max_size sufficiently large. For example,
setting client_request_buffer_max_size to 16 megabytes may allow you
to pass the test case you have privately shared.
On 12.08.24 11:27, Matus UHLAR - fantomas wrote:
I have submitted bug 5405 so it's documented:
https://bugs.squid-cache.org/show_bug.cgi?id=5405
Does this bug apply for POST requests as well?
I speculate that the answer is "yes": IIRC, the underlying bug may
affect any request with a large-enough body in _combination_ with other
events/factors that affect buffered data consumption. I have not
checked, but one of those factors could be, for example, the receiving
port protocol (i.e. ftp_port and FTP in your test case) and/or REQMOD
adaptation. I speculate that those "other" events rarely happen in a
typical Squid installation (explaining why most large requests do not
get stuck), but can be reproduced under controlled conditions with
http_port POSTs.
HTH,
Alex.
Because the biggest PUT is about 4MB so far, but I've seen POST requests
nearly 54MB big.
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