[squid-users] assertion failed: Server.cc:245: "r->body_pipe != NULL"

Hello List,
I have a Problem on a Centos 6.4 64 Bit System running RPM Package
squid-3.3.11-1.el6.x86_64.rpm

My squid.conf:
<snip>
http_port 172.25.254.50:80
http_port 127.0.0.1:3128
hierarchy_stoplist cgi-bin ?
visible_hostname blbla.domain.local
coredump_dir /var/spool/squid
ignore_unknown_nameservers off
high_memory_warning 3000 MB
cachemgr_passwd mysecret all
cache_mgr root_at_localhost
memory_pools off
cache_mem 1024 MB
cache_swap_low 90
cache_swap_high 95
cache_effective_user squid
cache_dir ufs /var/spool/squid 200000 16 256
access_log /var/log/squid/access.log squid
cache_log /var/log/squid/cache.log
cache_store_log /var/log/squid/store.log
pid_filename /var/log/squid/squid.pid
refresh_pattern ^ftp: 1440 20% 10080
refresh_pattern ^gopher: 1440 0% 1440
refresh_pattern . 0 20% 4320
append_domain .domain.local
acl localhost src 127.0.0.1/32 ::1
acl internal_if src 172.25.254.50/32
acl user1 src 172.25.63.152/32 172.25.63.134/32 172.25.33.238/32 172.25.33.21/32
acl to_localhost dst ::1
acl to_ipv6 dst ipv6
acl SSL_ports port 443 #
acl SSL_ports port 7001 #
acl SSL_ports port 7010 #
acl SSL_ports port 8443 #
acl SSL_ports port 9443 #
acl SSL_ports port 12120 #
acl SSL_ports port 54401 #
acl Safe_ports port 21 # ftp
acl Safe_ports port 70 # gopher
acl Safe_ports port 80 # http
acl Safe_ports port 81 # http
acl Safe_ports port 85 #
acl Safe_ports port 86 #
acl Safe_ports port 210 # wais
acl Safe_ports port 280 # http-mgmt
acl Safe_ports port 443 # https
acl Safe_ports port 488 # gss-http
acl Safe_ports port 591 # filemaker
acl Safe_ports port 777 # multiling http
acl Safe_ports port 1025-65535 # unregistered ports
acl ftp proto FTP
acl ftp_port port 21
acl ftp_port port 2121
acl CONNECT method CONNECT
acl QUERY urlpath_regex cgi-bin \?
acl snmppublic snmp_community public
acl swf-files urlpath_regex -i \.swf$
acl purge method PURGE
acl apache rep_header Server ^Apache
http_access deny to_ipv6 !all
http_access allow purge localhost internal_if
http_access allow manager localhost
http_access allow ftp_port CONNECT
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
cache deny QUERY
http_access allow localhost
http_access deny all
http_reply_access allow all
always_direct allow swf-files
redirect_program /usr/bin/squidguard -c /etc/squid/squidguard.conf
redirect_children 300
icp_access deny all
snmp_port 3401
snmp_access allow snmppublic kerpsys
snmp_access allow snmppublic localhost
snmp_access deny all
snmp_incoming_address 0.0.0.0
snmp_outgoing_address 255.255.255.255
reply_header_max_size 700 KB
broken_posts allow localhost
vary_ignore_expire on
detect_broken_pconn on
ftp_epsv_all on
ftp_epsv off
ftp_passive on
delay_pool_uses_indirect_client on
log_uses_indirect_client on
icap_enable on
icap_send_client_ip on
icap_send_client_username on
icap_client_username_header X-Authenticated-User
icap_service service_req reqmod_precache bypass=1
icap://127.0.0.1:1344/squidclamav
adaptation_access service_req allow all
icap_service service_resp respmod_precache bypass=1
icap://127.0.0.1:1344/squidclamav
adaptation_access service_resp allow all
<snip>

The cache restarts unregular times:
<snip>
2013/12/18 16:06:14 kid1| assertion failed: Server.cc:245: "r->body_pipe !=
NULL"
2013/12/18 16:06:50 kid1| assertion failed: Server.cc:245: "r->body_pipe !=
NULL"
2013/12/18 16:09:39 kid1| assertion failed: Server.cc:245: "r->body_pipe !=
NULL"
2013/12/18 16:16:14 kid1| assertion failed: Server.cc:245: "r->body_pipe !=
NULL"
2013/12/18 16:16:49 kid1| assertion failed: Server.cc:245: "r->body_pipe !=
NULL"
2013/12/18 16:19:39 kid1| assertion failed: Server.cc:245: "r->body_pipe !=
NULL"
2013/12/18 16:26:13 kid1| assertion failed: Server.cc:245: "r->body_pipe !=
NULL"
2013/12/18 16:26:50 kid1| assertion failed: Server.cc:245: "r->body_pipe !=
NULL"
2013/12/18 16:29:39 kid1| assertion failed: Server.cc:245: "r->body_pipe !=
NULL"
2013/12/18 16:36:13 kid1| assertion failed: Server.cc:245: "r->body_pipe !=
NULL"
2013/12/18 16:36:49 kid1| assertion failed: Server.cc:245: "r->body_pipe !=
NULL"
2013/12/18 16:39:38 kid1| assertion failed: Server.cc:245: "r->body_pipe !=
NULL"
2013/12/18 16:46:14 kid1| assertion failed: Server.cc:245: "r->body_pipe !=
NULL"
2013/12/18 16:46:50 kid1| assertion failed: Server.cc:245: "r->body_pipe !=
NULL"
2013/12/18 16:49:39 kid1| assertion failed: Server.cc:245: "r->body_pipe !=
NULL"
2013/12/18 16:56:14 kid1| assertion failed: Server.cc:245: "r->body_pipe !=
NULL"
2013/12/18 16:56:50 kid1| assertion failed: Server.cc:245: "r->body_pipe !=
NULL"
2013/12/18 16:59:39 kid1| assertion failed: Server.cc:245: "r->body_pipe !=
NULL"
<snip>

Tried to find with multitail in parallel accessing cache.log and access.log what
has been accessed when the cache restarts - but I'll find different URL's.

Any hints or tips on
<snip>
assertion failed: Server.cc:245: "r->body_pipe != NULL"
<snip>
?

Cheers,
ku

-- 
Luke blows up his first TIE fighter.
Luke Skywalker:
	Got 'im! I got 'im!
Han Solo:
	Great, kid! Don't get cocky!