assertion failed: MemBuf.cc:216: "0 <= tailSize && tailSize <= cSize"

[Thomas]

Hi,

we are getting many times squid crashes. On the cache.log it shows:

2018/04/09 11:58:47 kid1| assertion failed: MemBuf.cc:216: "0 <= tailSize && tailSize <= cSize"
2018/04/09 11:58:51| Pinger exiting.

on syslog you read this:

Apr 9 11:56:32 proxy squid[903]: Squid Parent: will start 1 kids
Apr 9 11:56:32 proxy squid[903]: Squid Parent: (squid-1) process 906 started
Apr 9 11:58:42 proxy squid[903]: Squid Parent: (squid-1) process 906 exited due to signal 6 with status 0
Apr 9 11:58:45 proxy squid[903]: Squid Parent: (squid-1) process 1522 started
Apr 9 11:58:48 proxy squid[903]: Squid Parent: (squid-1) process 1522 exited due to signal 6 with status 0
Apr 9 11:58:51 proxy squid[903]: Squid Parent: (squid-1) process 1554 started
Apr 9 11:58:54 proxy squid[903]: Squid Parent: (squid-1) process 1554 exited due to signal 6 with status 0
Apr 9 11:58:57 proxy squid[903]: Squid Parent: (squid-1) process 1594 started
Apr 9 11:58:59 proxy squid[903]: Squid Parent: (squid-1) process 1594 exited due to signal 6 with status 0
Apr 9 11:59:02 proxy squid[903]: Squid Parent: (squid-1) process 1647 started
Apr 9 11:59:04 proxy squid[903]: Squid Parent: (squid-1) process 1647 exited due to signal 6 with status 0
Apr 9 11:59:07 proxy squid[903]: Squid Parent: (squid-1) process 1683 started
Apr 9 11:59:09 proxy squid[903]: Squid Parent: (squid-1) process 1683 exited due to signal 6 with status 0
Apr 9 11:59:09 proxy squid[903]: Squid Parent: (squid-1) process 1683 will not be restarted due to repeated, frequent failures
Apr 9 11:59:09 proxy squid[903]: Exiting due to repeated, frequent failures

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: squid 3.5.27-1ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10
Uname: Linux 4.15.0-13-generic x86_64
ApportVersion: 2.20.9-0ubuntu4
Architecture: amd64
Date: Tue Apr 10 11:12:27 2018
InstallationDate: Installed on 2018-03-26 (14 days ago)
InstallationMedia: Ubuntu-Server 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180325)
ProcEnviron:
 LANG=de_DE.UTF-8
 TERM=xterm
 SHELL=/bin/bash
 PATH=(custom, no user)
SourcePackage: squid3
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.squid.squid.conf: [modified]
mtime.conffile..etc.logrotate.d.squid: 2018-03-26T14:52:15.366011
mtime.conffile..etc.squid.squid.conf: 2018-04-10T11:05:02.821725

[Thomas (t.c)]

I linked a upstream bug - it looks like the same problem.

[Andreas Hasenack (ahasenack)]

The activity in the upstream bug seems to have stalled. Last report seems to indicate that http://bugs.squid-cache.org/attachment.cgi?id=3549 "works around the problem", but it's not clear what the consequences are of the workaround versus a proper committed fix.