Squid 3.5.2 will only start if cache directory is empty

[Stanford Prescott <stan.prescott@xxxxxxxxx>]

I posted this message to the list a few days ago but haven't received any responses yet. I am hoping someone might be able to provide some insight on what is going on.

I have been trying to get Squid 3.5.2 to work with the Smoothwall Express 3.1 Linux firewall distribution. Specifically, I have modified the Squid version included with Smoothwall Express 3.1 to enable HTTPS caching. I have had this working successfully up to Squid version 3.4.10. Now with trying to upgrade to Squid 3.5.2 I am having problems that I didn't encounter with prior versions of Squid.

The first issue I had, which is now resolved, was improper permissions of the shm folder (in SWE found in /dev/shm). Changing the folder permissions to Squid user and group allowed Squid 3.5.2 to start. However, now it will only start with an empty cache directory. Once it starts with an empty cache directory, it seems to function correctly as far as caching SSL encrypted web pages. However, if Squid needs to be restarted for any reason, it will not restart until the cache directory (/var/spool/squid/cache) is emptied.

The error I am getting when trying to start Squid 3.5.2 without an empty cache is

2015/03/14 00:29:47 kid1| Current Directory is /

2015/03/14 00:29:47 kid1| Starting Squid Cache version 3.5.2 for i586-pc-linux-gnu...

2015/03/14 00:29:47 kid1| Service Name: squid

2015/03/14 00:29:47 kid1| Process ID 7261

2015/03/14 00:29:47 kid1| Process Roles: worker

2015/03/14 00:29:47 kid1| With 1024 file descriptors available

2015/03/14 00:29:47 kid1| Initializing IP Cache...

2015/03/14 00:29:47 kid1| DNS Socket created at 0.0.0.0, FD 8

2015/03/14 00:29:47 kid1| Adding nameserver 127.0.0.1 from /etc/resolv.conf

2015/03/14 00:29:47 kid1| helperOpenServers: Starting 5/5 'ssl_crtd' processes

FATAL: Ipc::Mem::Segment::open failed to shm_open(/squid-ssl_session_cache.shm): (2) No such file or directory

Squid Cache (Version 3.5.2): Terminated abnormally.

CPU Usage: 0.027 seconds = 0.020 user + 0.007 sys

Maximum Resident Size: 26752 KB

Page faults with physical i/o: 0

2015/03/14 00:29:47.830 kid1| Acl.cc(380) ~ACL: freeing ACL 

What is the "squid-ssl_session_cache". Am I supposed to define that somewhere in the

Squid configuration? Is that why I am getting that error message because an ssl_session_cache is not defined somewhere?

This is my squid.conf file with SSL caching using ssl-bump enabled.

visible_hostname smoothwall

# Uncomment the following to send debug info to /var/log/squid/cache.log

debug_options ALL,1 33,2 28,9

# ACCESS CONTROLS

# ----------------------------------------------------------------

acl localhostgreen src 192.168.100.1

acl localnetgreen src 192.168.100.0/24

acl SSL_ports port 445 443 441 563

acl Safe_ports port 80      # http

acl Safe_ports port 81      # smoothwall http

acl Safe_ports port 21      # ftp 

acl Safe_ports port 445 443 441 563 # https, snews

acl Safe_ports port 70      # gopher

acl Safe_ports port 210         # wais  

acl Safe_ports port 1025-65535 # unregistered ports

acl Safe_ports port 280        # http-mgmt

acl Safe_ports port 488        # gss-http 

acl Safe_ports port 591        # filemaker

acl Safe_ports port 777        # multiling http

acl CONNECT method CONNECT

# TAG: http_access

# ----------------------------------------------------------------

http_access deny !Safe_ports

http_access deny CONNECT !SSL_ports

http_access allow localnetgreen

http_access allow CONNECT localnetgreen

http_access allow localhostgreen

http_access allow CONNECT localhostgreen

# http_port and https_port

#----------------------------------------------------------------------------

# A random port for forward-proxy port needed for SSL

http_port 8081

http_port 192.168.100.1:800 intercept ssl-bump generate-host-certificates=on dynamic_cert_mem_cache_size=4MB cert=/var/smoothwall/mods/proxy/ssl_cert/squidCA.pem

https_port 192.168.100.1:808 intercept ssl-bump generate-host-certificates=on dynamic_cert_mem_cache_size=4MB cert=/var/smoothwall/mods/proxy/ssl_cert/squidCA.pem

sslproxy_cert_error allow all

sslproxy_flags DONT_VERIFY_PEER

ssl_bump server-first all

ssl_bump none localhostgreen

sslcrtd_program /var/smoothwall/mods/proxy/libexec/ssl_crtd -s /var/smoothwall/mods/proxy/lib/ssl_db -M 4MB

sslcrtd_children 5

sslproxy_session_cache_size 4 MB

http_access deny all

cache_replacement_policy heap GDSF

memory_replacement_policy heap GDSF

# CACHE OPTIONS

# ----------------------------------------------------------------------------

cache_effective_user squid

cache_effective_group squid

cache_swap_high 100

cache_swap_low 80

cache_mem 8 MB

maximum_object_size_in_memory 512 KB

cache_access_log /var/log/squid/access.log

cache_log /var/log/squid/cache.log

cache_store_log none

error_directory /usr/share/errors/en-us

log_mime_hdrs off

cache_dir diskd /var/spool/squid/cache 1024 16 256 Q1=64 Q2=72

request_header_access Content-Type allow all

request_header_access Date allow all

request_header_access Host allow all

request_header_access If-Modified-Since allow all

request_header_access Pragma allow all

request_header_access Accept allow all

request_header_access Accept-Charset allow all

request_header_access Accept-Encoding allow all

request_header_access Accept-Language allow all

request_header_access Connection allow all

request_header_access All allow all

maximum_object_size 33 MB

minimum_object_size 0 KB

request_body_max_size 0 KB

# OTHER OPTIONS

# ----------------------------------------------------------------------------

forwarded_for off

pid_filename /var/run/squid.pid

shutdown_lifetime 3 seconds

icp_port 3130

half_closed_clients off

umask 022

logfile_rotate 0

strip_query_terms off

Any help would be greatly appresciated.

Stan

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