:: Regarding using Software Load balancer Mod_jk1.2.23 with
bhaktavatsalamreddy Jul 18, 2007 6:27 PMHi,
I am not sure if I am in the right forum regarding setting up the load balancer with JBoss4.2.0 GA.
I have clearly followed the step by step procedure mentioned in the following link:
http://www.jboss.org/wiki/Wiki.jsp?page=UsingMod_jk1.2WithJBoss
Configuration files and properties files required to set up are:
1. httpd.conf
2. mod-jk.conf
3. workers.properties
4. uriworkermap.properties
All of the above files are placed under
apache2/conf
5. server.xml
placed under
default/deploy/conf/jbossweb-tomcat55.sar
6. jboss-service.xml
placed under
default/deploy/conf/jbossweb-tomcat55.sar
1. httpd.conf
Added the following piece to the existing file under the mensioned dir:
# Include mod_jk configuration file Include conf/mod-jk.conf # Configure mod_jk # JkWorkersFile conf/workers.properties JkLogFile logs/mod_jk.log JkLogLevel debug JkMount /web-console/* node1 JkMount /jmx-console/* node1 JkMount /mambo/* node1 JkMount /*.jsp node1 JkMount /servlet/* node1 LoadModule jk_module modules/mod_jk.so
2. mod-jk.conf
# Load mod_jk module # Specify the filename of the mod_jk lib LoadModule jk_module modules/mod_jk.so # Where to find workers.properties JkWorkersFile conf/workers.properties # Where to put jk logs JkLogFile logs/mod_jk.log # Set the jk log level [debug/error/info] JkLogLevel debug # Select the log format JkLogStampFormat "[%a %b %d %H:%M:%S %Y]" # JkOptions indicates to send SSK KEY SIZE # Note: Changed from +ForwardURICompat. # See http://tomcat.apache.org/security-jk.html JkOptions +ForwardKeySize +ForwardURICompatUnparsed -ForwardDirectories # JkRequestLogFormat JkRequestLogFormat "%w %V %T" # Mount your applications JkMount /web-console/* loadbalancer JkMount /jmx-console/* loadbalancer JkMount /mambo/* loadbalancer # You can use external file for mount points. # It will be checked for updates each 60 seconds. # The format of the file is: /url=worker # /examples/*=loadbalancer JkMountFile conf/uriworkermap.properties # Add shared memory. # This directive is present with 1.2.10 and # later versions of mod_jk, and is needed for # for load balancing to work properly # Note: Replaced JkShmFile logs/jk.shm due to SELinux issues. Refer to # https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=225452 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>
3. workers.properties
# Define list of workers that will be used # for mapping requests # The configuration directives are valid # for the mod_jk version 1.2.18 and later # workers.tomcat_home=C:\jboss-4.2.0.GA worker.list=loadbalancer,status # Define Node1 # modify the host as your host IP or DNS name. worker.node1.port=8009 worker.node1.host=localhost worker.node1.type=ajp13 worker.node1.cachesize=50 worker.node1.cache_timeout=600 worker.node1.socket_keepalive=1 worker.node1.recycle_timeout=300 worker.node1.lbfactor=1 # worker.node1.connection_pool_size=10 (1) # Load-balancing behaviour worker.loadbalancer.type=lb worker.loadbalancer.balance_workers=node1 worker.loadbalancer.sticky_session=Off # Status worker for managing load balancer worker.status.type=status
4. uriworkermap.properties
# Simple worker configuration file # # Mount the Servlet context to the ajp13 worker /jmx-console=loadbalancer /jmx-console/*=loadbalancer /web-console=loadbalancer /web-console/*=loadbalancer /mambo=loadbalancer /mambo/*=loadbalancer
5. server.xml
Adde following snippets to the existing file:
<Connector protocol="AJP/1.3" port="8009" minProcessors="5" maxProcessors="75" enableLookups="false" redirectPort="8443" acceptCount="10" debug="0" connectionTimeout="0" useURIValidationHack="false"/>
and
<Engine name="jboss.web" defaultHost="localhost" jvmRoute="node1">
6. jboss-service.xml
Modified the existing file as follows and added the following snippet:
<attribute name="UseJK">true</attribute>
I am trying to access it via:
http://localhost/web-console
or
http://localhost/jmx-console
0r
http://localhost/mambo
I am getting the following error:
Service Temporarily Unavailable The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later. -------------------------------------------------------------------------------- Apache/2.0.59 (Win32) mod_jk/1.2.23 Server at 10.1.5.231 Port 80
The access.log is as follows:
[Wed Jul 18 13:04:23 2007] [warn] module jk_module is already loaded, skipping [Wed Jul 18 13:04:33 2007] [warn] module jk_module is already loaded, skipping 127.0.0.1 - - [18/Jul/2007:13:05:02 -0700] "GET /mambo HTTP/1.1" 503 412 127.0.0.1 - - [18/Jul/2007:13:57:17 -0700] "GET /mambo HTTP/1.1" 503 412 [Wed Jul 18 14:10:53 2007] [warn] module jk_module is already loaded, skipping 127.0.0.1 - - [18/Jul/2007:14:11:00 -0700] "GET /mambo HTTP/1.1" 503 412
The error.log is as follows :
[Wed Jul 18 14:10:55 2007] [debug] child.c(697): Child 6916: Worker thread 237 starting. [Wed Jul 18 14:10:55 2007] [debug] child.c(697): Child 6916: Worker thread 239 starting. [Wed Jul 18 14:10:55 2007] [debug] child.c(697): Child 6916: Worker thread 241 starting. [Wed Jul 18 14:10:55 2007] [debug] child.c(697): Child 6916: Worker thread 243 starting. [Wed Jul 18 14:10:55 2007] [debug] child.c(697): Child 6916: Worker thread 245 starting. [Wed Jul 18 14:10:55 2007] [debug] child.c(697): Child 6916: Worker thread 247 starting.
The mod_jk.log is as follows:
[Wed Jul 18 14:39:27 2007][6916:11872] [debug] jk_uri_worker_map.c (726): File C:/ApacheGroup/Apache2/conf/uriworkermap.properties is not modified [Wed Jul 18 14:39:27 2007][6916:11872] [debug] jk_uri_worker_map.c (589): Attempting to map URI '/mambo' from 12 maps [Wed Jul 18 14:39:27 2007][6916:11872] [debug] jk_uri_worker_map.c (601): Attempting to map context URI '/jmx-console/*=loadbalancer' source 'uriworkermap' [Wed Jul 18 14:39:27 2007][6916:11872] [debug] jk_uri_worker_map.c (601): Attempting to map context URI '/web-console/*=loadbalancer' source 'uriworkermap' [Wed Jul 18 14:39:27 2007][6916:11872] [debug] jk_uri_worker_map.c (601): Attempting to map context URI '/web-console/*=node1' source 'JkMount' [Wed Jul 18 14:39:27 2007][6916:11872] [debug] jk_uri_worker_map.c (601): Attempting to map context URI '/jmx-console/*=node1' source 'JkMount' [Wed Jul 18 14:39:27 2007][6916:11872] [debug] jk_uri_worker_map.c (601): Attempting to map context URI '/servlet/*=node1' source 'JkMount' [Wed Jul 18 14:39:27 2007][6916:11872] [debug] jk_uri_worker_map.c (601): Attempting to map context URI '/jkstatus/=status' source 'JkMount' [Wed Jul 18 14:39:27 2007][6916:11872] [debug] jk_uri_worker_map.c (601): Attempting to map context URI '/mambo/*=loadbalancer' source 'uriworkermap' [Wed Jul 18 14:39:27 2007][6916:11872] [debug] jk_uri_worker_map.c (601): Attempting to map context URI '/mambo/*=node1' source 'JkMount' [Wed Jul 18 14:39:27 2007][6916:11872] [debug] jk_uri_worker_map.c (601): Attempting to map context URI '/jmx-console=loadbalancer' source 'uriworkermap' [Wed Jul 18 14:39:27 2007][6916:11872] [debug] jk_uri_worker_map.c (601): Attempting to map context URI '/web-console=loadbalancer' source 'uriworkermap' [Wed Jul 18 14:39:27 2007][6916:11872] [debug] jk_uri_worker_map.c (601): Attempting to map context URI '/mambo=loadbalancer' source 'uriworkermap' [Wed Jul 18 14:39:27 2007][6916:11872] [debug] jk_uri_worker_map.c (627): Found an exact match '/mambo=loadbalancer' [Wed Jul 18 14:39:27 2007][6916:11872] [debug] mod_jk.c (2111): Into handler jakarta-servlet worker=loadbalancer r->proxyreq=0 [Wed Jul 18 14:39:27 2007][6916:11872] [debug] jk_worker.c (114): found a worker loadbalancer [Wed Jul 18 14:39:27 2007][6916:11872] [debug] jk_worker.c (321): Maintaining worker loadbalancer [Wed Jul 18 14:39:27 2007][6916:11872] [debug] jk_ajp_common.c (2416): reached pool min size 25 from 50 cache slots [Wed Jul 18 14:39:27 2007][6916:11872] [debug] jk_ajp_common.c (2424): recycled 0 sockets in 0 seconds from 50 pool slots [Wed Jul 18 14:39:27 2007][6916:11872] [debug] jk_lb_worker.c (543): decay with 2^23 [Wed Jul 18 14:39:27 2007][6916:11872] [debug] jk_lb_worker.c (444): worker node1 is marked for recovery [Wed Jul 18 14:39:27 2007][6916:11872] [debug] jk_worker.c (290): Found worker type 'lb' [Wed Jul 18 14:39:27 2007][6916:11872] [debug] mod_jk.c (607): Service protocol=HTTP/1.1 method=GET host=(null) addr=127.0.0.1 name=10.1.5.231 port=80 auth=(null) user=(null) laddr=127.0.0.1 raddr=127.0.0.1 [Wed Jul 18 14:39:27 2007][6916:11872] [debug] jk_lb_worker.c (915): service sticky_session=0 id='empty' [Wed Jul 18 14:39:27 2007][6916:11872] [debug] jk_lb_worker.c (935): service worker=node1 route=node1 [Wed Jul 18 14:39:27 2007][6916:11872] [debug] jk_ajp_common.c (2343): acquired connection pool slot=0 [Wed Jul 18 14:39:27 2007][6916:11872] [debug] jk_ajp_common.c (548): ajp marshaling done [Wed Jul 18 14:39:27 2007][6916:11872] [debug] jk_ajp_common.c (1796): processing node1 with 2 retries [Wed Jul 18 14:39:27 2007][6916:11872] [debug] jk_connect.c (335): socket TCP_NODELAY set to On [Wed Jul 18 14:39:27 2007][6916:11872] [debug] jk_connect.c (348): socket SO_KEEPALIVE set to On [Wed Jul 18 14:39:27 2007][6916:11872] [debug] jk_connect.c (433): trying to connect socket 824 to 127.0.0.1:8080 [Wed Jul 18 14:39:28 2007][6916:11872] [info] jk_connect.c (451): connect to 127.0.0.1:8080 failed (errno=61) [Wed Jul 18 14:39:28 2007][6916:11872] [info] jk_ajp_common.c (876): Failed opening socket to (127.0.0.1:8080) (errno=61) [Wed Jul 18 14:39:28 2007][6916:11872] [info] jk_ajp_common.c (1273): (node1) error connecting to the backend server (errno=61) [Wed Jul 18 14:39:28 2007][6916:11872] [info] jk_ajp_common.c (1941): (node1) sending request to tomcat failed, recoverable operation attempt=1 [Wed Jul 18 14:39:28 2007][6916:11872] [debug] jk_connect.c (335): socket TCP_NODELAY set to On [Wed Jul 18 14:39:28 2007][6916:11872] [debug] jk_connect.c (348): socket SO_KEEPALIVE set to On [Wed Jul 18 14:39:28 2007][6916:11872] [debug] jk_connect.c (433): trying to connect socket 824 to 127.0.0.1:8080 [Wed Jul 18 14:39:29 2007][6916:11872] [info] jk_connect.c (451): connect to 127.0.0.1:8080 failed (errno=61) [Wed Jul 18 14:39:29 2007][6916:11872] [info] jk_ajp_common.c (876): Failed opening socket to (127.0.0.1:8080) (errno=61) [Wed Jul 18 14:39:29 2007][6916:11872] [info] jk_ajp_common.c (1273): (node1) error connecting to the backend server (errno=61) [Wed Jul 18 14:39:29 2007][6916:11872] [info] jk_ajp_common.c (1941): (node1) sending request to tomcat failed, recoverable operation attempt=2 [Wed Jul 18 14:39:29 2007][6916:11872] [error] jk_ajp_common.c (1953): (node1) Connecting to tomcat failed. Tomcat is probably not started or is listening on the wrong port [Wed Jul 18 14:39:29 2007][6916:11872] [debug] jk_ajp_common.c (2286): recycling connection pool slot=0 for worker node1 [Wed Jul 18 14:39:29 2007][6916:11872] [info] jk_lb_worker.c (1098): service failed, worker node1 is in error state [Wed Jul 18 14:39:29 2007][6916:11872] [debug] jk_lb_worker.c (1111): recoverable error... will try to recover on other worker [Wed Jul 18 14:39:29 2007][6916:11872] [info] jk_lb_worker.c (1160): All tomcat instances are busy or in error state [Wed Jul 18 14:39:29 2007]loadbalancer 10.1.5.231 1.921875 [Wed Jul 18 14:39:29 2007][6916:11872] [info] mod_jk.c (2254): Service error=0 for worker=loadbalancer
Help in this regard would be highly appreciated.
Thanks in advance,
Bhakta