Hello to all,
I have a problem with mod_jk (hope this is the right place form my problem).
Used servers and versions:
- Apache 2.2.15 (Win32)
- mod_jk/1.2.30
- Apache Tomcat/6.0.20 using AJP/1.3
- jdk1.5.0_12
Problem description:
I enter the appropriate URL pointing to the balancing web server into the
internet explorer address bar (IE on a host different to the machine where web
server and tomcats are installed), press enter and get a '503 - service
unavailable message' back.
I have 2 Tomcat instances, both up and running and http accessible.
When (with the same internet explorer window) I first enter the URL of one
Tomcat instance directly, get the requested page back, then again try the URL
using the web server, it suddenly works. This seems not to be due to caching,
because I do not see the failure message in mod_jk.log anymore and I get log
information which indicates that everything went fine.
When I try to access the web server URL locally from the machine where all
servers are installed, it works from the beginning.
I tried several configurations and don't know what else to try.
The mod_jk status page shows that the tomcat instances were found and that
there is no error.
mod_jk.log shows those messages when I enter the web servers URL:
(I attached 2 full mod_jk.conf to this email with different configs but same
result).
[Mon Jun 07 18:29:29 2010][1944:408] [debug] jk_uri_worker_map.c (1036):
Attempting to map URI '/W********h/' from 4 maps [Mon Jun 07 18:29:29
2010][1944:408] [debug] jk_uri_worker_map.c (850): Attempting to map context
URI '/W********h/*=balancer' source 'JkMount'
[Mon Jun 07 18:29:29 2010][1944:408] [debug] jk_uri_worker_map.c (863): Found a
wildchar match '/W********h/*=balancer'
[Mon Jun 07 18:29:29 2010][1944:408] [debug] mod_jk.c (2462): Into handler
jakarta-servlet worker=balancer r->proxyreq=0 [Mon Jun 07 18:29:29
2010][1944:408] [debug] jk_worker.c (116): found a worker balancer [Mon Jun 07
18:29:29 2010][1944:408] [debug] jk_worker.c (339): Maintaining worker balancer
[Mon Jun 07 18:29:29 2010][1944:408] [debug] jk_ajp_common.c (3197): reached
pool min size 32 from 64 cache slots [Mon Jun 07 18:29:29 2010][1944:408]
[debug] jk_ajp_common.c (3197): reached pool min size 32 from 64 cache slots
[Mon Jun 07 18:29:29 2010][1944:408] [debug] jk_worker.c (293): Found worker
type 'lb'
[Mon Jun 07 18:29:29 2010][1944:408] [debug] mod_jk.c (978): Service
protocol=HTTP/1.0 method=GET ssl=false host=(null) addr=**.*.*.130
name=********* port=8080 auth=(null) user=(null) laddr=**.*.*.21
raddr=**.*.*.130 uri=/Workbench/ [Mon Jun 07 18:29:29 2010][1944:408] [debug]
jk_lb_worker.c (1118): service sticky_session=1
id='933BF867682BC5657E3F27E5D17917D7'
[Mon Jun 07 18:29:29 2010][1944:408] [debug] jk_lb_worker.c (946): searching
worker for partial sessionid 933BF867682BC5657E3F27E5D17917D7 [Mon Jun 07
18:29:29 2010][1944:408] [info] jk_lb_worker.c (985): all workers are in error
state for session 933BF867682BC5657E3F27E5D17917D7 [Mon Jun 07 18:29:29
2010][1944:408] [info] jk_lb_worker.c (1448): All tomcat instances failed, no
more workers left for recovery (attempt=0, retry=0) [Mon Jun 07 18:29:29
2010][1944:408] [debug] jk_lb_worker.c (946): searching worker for partial
sessionid 933BF867682BC5657E3F27E5D17917D7 [Mon Jun 07 18:29:29 2010][1944:408]
[info] jk_lb_worker.c (985): all workers are in error state for session
933BF867682BC5657E3F27E5D17917D7 [Mon Jun 07 18:29:29 2010][1944:408] [info]
jk_lb_worker.c (1457): All tomcat instances failed, no more workers left
(attempt=1, retry=0) [Mon Jun 07 18:29:29 2010][1944:408] [debug]
jk_lb_worker.c (1131): retry 1, sleeping for 100 ms before retrying [Mon Jun 07
18:29:29 2010][1944:408] [debug] jk_lb_worker.c (946): searching worker for
partial sessionid 933BF867682BC5657E3F27E5D17917D7 [Mon Jun 07 18:29:29
2010][1944:408] [info] jk_lb_worker.c (985): all workers are in error state for
session 933BF867682BC5657E3F27E5D17917D7 [Mon Jun 07 18:29:29 2010][1944:408]
[info] jk_lb_worker.c (1457): All tomcat instances failed, no more workers left
(attempt=0, retry=1) [Mon Jun 07 18:29:29 2010][1944:408] [debug]
jk_lb_worker.c (946): searching worker for partial sessionid
933BF867682BC5657E3F27E5D17917D7 [Mon Jun 07 18:29:29 2010][1944:408] [info]
jk_lb_worker.c (985): all workers are in error state for session
933BF867682BC5657E3F27E5D17917D7 [Mon Jun 07 18:29:29 2010][1944:408] [info]
jk_lb_worker.c (1457): All tomcat instances failed, no more workers left
(attempt=1, retry=1) [Mon Jun 07 18:29:29 2010][1944:408] [info] jk_lb_worker.c
(1468): All tomcat instances are busy or in error state [Mon Jun 07 18:29:29
2010][1944:408] [error] jk_lb_worker.c (1473): All tomcat instances failed, no
more workers left [Mon Jun 07 18:29:29 2010]balancer ********* 0.109377 [Mon
Jun 07 18:29:29 2010][1944:408] [info] mod_jk.c (2618): Service error=0 for
worker=balancer
workers.properties:
-------------------------------------------------------------------------
#Define path to JAVA_HOME
workers.java_home=C:\Program Files (x86)\Java\jdk1.5.0_12
# Define list of workers that will be used # for mapping requests
worker.list=balancer,status
# DEFAULT CONFIG FOR WORKERS
worker.default.host=localhost
worker.default.type=ajp13
worker.default.lbfactor=100
worker.default.cachesize=200
worker.default.connection_pool_size=64
# Define Node1
worker.worker1.reference=worker.default
worker.worker1.port=8033
# Define Node2
worker.worker2.reference=worker.default
worker.worker2.port=8044
# Load balancing behaviour
worker.balancer.type=lb
worker.balancer.balance_workers=worker1,worker2
worker.balancer.method=1
worker.balancer.sticky_session=true
worker.balancer.sticky_session_force=true
# Status worker for managing load balancer worker.status.type=status
-------------------------------------------------------------------------
-------------------------------------------------------------------------
mod_jk.conf:
-------------------------------------------------------------------------
# Load mod_jk module
# Specify the filename of the mod_jk lib LoadModule jk_module
modules/mod_jk-1.2.30-httpd-2.2.3.so
#Path to workers.properties
JkWorkersFile conf/workers.properties
#Path to jk logs
JkLogFile logs/mod_jk.log
#Jlk log level [debug/error/info]
JkLogLevel debug
#Jk log format
JkLogStampFormat "[%a %b %d %H:%M:%S %Y]"
#JkRequestLogFormat set the request format JkRequestLogFormat "%w %V %T"
# Mount your applications
JkMount /W*******h balancer
JkMount /W*******h/* balancer
# Add the jkstatus mount point
JKMount /status/* status
# Add shared memory.
# This directive is present with 1.2.10 and # later versions of mod_jk, and is
needed for # load balancing to work properly JkShmFile logs/jk.shm
# Add jkstatus for managing runtime data <Location /jkstatus/>
JkMount status
Order deny,allow
Deny from all
Allow from 127.0.0.1
</Location>
-------------------------------------------------------------------------
Regards,
Daniel Mangold
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