[squid-users] Fw: [Bug 4977] stmem.cc:98: "lowestOffset () <= target_offset" assertion when adapting Content-Range value

[Matus UHLAR - fantomas]

>On 11/4/19 11:21 AM, Matus UHLAR - fantomas wrote:
>> the last request:
>>
>> CONNECT www.google.com:443 HTTP/1.1
>> Host: www.google.com

On 04.11.19 12:13, Alex Rousskov wrote:
>That request does not seem to match the stack trace: The stack trace
>points to a non-CONNECT transaction AFAICT.

Oh, yes, may be caused by other GET request fetching from cache or storing
to cache (doesn't happen wich cache disabled).

> Perhaps you are bumping that
>tunnel? Please note that you are not looking for the last request, but
>for the request that triggered the assertion. It is very difficult to do
>that with just ALL,2 and stripped executable, especially when you have
>lots of concurrent transactions flying by.

No bumping. I can create unstripped executable (great if it works with
current core, but I may create new one).


>> ----------
>> 2019/11/04 16:59:09.721 kid1| 85,2| client_side_request.cc(752)
>> clientAccessCheckDone: The request CONNECT www.google.com:443 is
>> ALLOWED; last ACL checked: work_time1
>> 2019/11/04 16:59:09.721 kid1| 85,2| client_side_request.cc(728)
>> clientAccessCheck2: No adapted_http_access configuration. default: ALLOW
>> 2019/11/04 16:59:09.721 kid1| 85,2| client_side_request.cc(752)
>> clientAccessCheckDone: The request CONNECT www.google.com:443 is
>> ALLOWED; last ACL checked: work_time1
>> 2019/11/04 16:59:09.721 kid1| 44,2| peer_select.cc(281)
>> peerSelectDnsPaths: Find IP destination for: www.google.com:443' via
>> www.google.com
>> 2019/11/04 16:59:09.721 kid1| 44,2| peer_select.cc(302)
>> peerSelectDnsPaths: Found sources for 'www.google.com:443'
>> 2019/11/04 16:59:09.721 kid1| 44,2| peer_select.cc(303)
>> peerSelectDnsPaths:   always_direct = DENIED
>> 2019/11/04 16:59:09.721 kid1| 44,2| peer_select.cc(304)
>> peerSelectDnsPaths:    never_direct = DENIED
>> 2019/11/04 16:59:09.721 kid1| 44,2| peer_select.cc(308)
>> peerSelectDnsPaths:          DIRECT = local=[::]
>> remote=[2a00:1450:4014:801::2004]:443 flags=1
>> 2019/11/04 16:59:09.721 kid1| 44,2| peer_select.cc(308)
>> peerSelectDnsPaths:          DIRECT = local=0.0.0.0
>> remote=216.58.201.100:443 flags=1
>> 2019/11/04 16:59:09.721 kid1| 44,2| peer_select.cc(317)
>> peerSelectDnsPaths:        timedout = 0
>> 2019/11/04 16:59:09.725 kid1| 20,2| store.cc(980) checkCachable:
>> StoreEntry::checkCachable: NO: not cachable
>> 2019/11/04 16:59:09.727 kid1| 33,2| client_side.cc(582) swanSong:
>> local=192.168.251.230:3128 remote=192.168.169.31:62822 flags=1
>> 2019/11/04 16:59:09.730 kid1| 20,2| store.cc(980) checkCachable:
>> StoreEntry::checkCachable: NO: not cachable
>> 2019/11/04 16:59:09.730 kid1| assertion failed: stmem.cc:98:
>> "lowestOffset () <= target_offset"
>>
>>
>> and the gdb backtrace:
>>
>> Core was generated by `(squid-1) --kid squid-1 -YC -f
>> /etc/squid/squid.conf'.
>> Program terminated with signal SIGABRT, Aborted.
>> #0  __GI_raise (sig=sig at entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
>> 50      ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
>> [Current thread is 1 (Thread 0x7f939ea82e80 (LWP 13179))]
>> (gdb) backtrace
>> #0  __GI_raise (sig=sig at entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
>> #1  0x00007f93a15b2535 in __GI_abort () at abort.c:79
>> #2  0x00005654ebcee5ad in ?? ()
>> #3  0x00005654ebe6c170 in mem_hdr::freeDataUpto(long) ()
>> #4  0x00005654ebe27440 in MemObject::trimSwappable() ()
>> #5  0x00005654ebe74bf5 in StoreEntry::trimMemory(bool) ()
>> #6  0x00005654ec100a80 in Store::Controller::memoryOut(StoreEntry&,
>> bool) ()
>> #7  0x00005654ebe84305 in StoreEntry::swapOut() ()
>> #8  0x00005654ebe7b3fd in StoreEntry::invokeHandlers() ()
>> #9  0x00005654ebe736ac in StoreEntry::write(StoreIOBuffer) ()
>> #10 0x00005654ebf0a590 in Client::storeReplyBody(char const*, long) ()
>> #11 0x00005654ebdeca37 in HttpStateData::writeReplyBody() ()
>> #12 0x00005654ebdf1bd5 in HttpStateData::processReplyBody() ()
>> #13 0x00005654ebdf382a in HttpStateData::processReply() ()
>> #14 0x00005654ebdf4da8 in HttpStateData::readReply(CommIoCbParams
>> const&) ()
>> #15 0x00005654ebdf8d6b in JobDialer<HttpStateData>::dial(AsyncCall&) ()
>> #16 0x00005654ebf5be51 in AsyncCall::make() ()
>> #17 0x00005654ebf5d3a4 in AsyncCallQueue::fireNext() ()
>> #18 0x00005654ebf5d6e9 in AsyncCallQueue::fire() ()
>> #19 0x00005654ebdb98ea in EventLoop::runOnce() ()
>> #20 0x00005654ebdb99d8 in EventLoop::run() ()
>> #21 0x00005654ebe22ab9 in SquidMain(int, char**) ()
>> #22 0x00005654ebd13901 in main ()
>> (gdb)
>>
>> I don't know where do those raise.c and raise.c belong (libthread? glibc?)
>>
>> squid is stripped, i could probably compile it without stripping and re-try
>>
>> Any ideas how to debug further? (disabling multi-cpu?)

-- 
Matus UHLAR - fantomas, uhlar at fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
"Where do you want to go to die?" [Microsoft]