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From: Jorge Medina <jmedina@e-dialog.com>
To: Tomcat Users List <users@tomcat.apache.org>
Date: Wed, 4 Nov 2009 15:15:16 -0500
Subject: RE: Problem forward HTTP / Soap request using mod_jk
Thread-Topic: Problem forward HTTP / Soap request using mod_jk
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Did you add a "load blancer worker" to your workers.properties?=20

Below is what I use to perform load balancing over two Tomcat servers.

I have a similar scenario: Apache in front of two (or more Tomcats).=20
Apache forwards the requests using mod_jk.=20
My client is sending SOAP requests using Axis2.


worker.list=3D wlb, jkwatch
###########################################################################=
###
# Defining a load balancer worker
###########################################################################=
###
worker.wlb.type=3Dlb
worker.wlb.balance_workers=3Dtomcatserver1, tomcatserver2
worker.wlb.max_reply_timeouts=3D3
# worker.wlb.retries=3D2
# worker.wlb.retry_interval=3D100
# worker.wlb.sticky_session=3DTrue
# worker.wlb.sticky_session_force=3DFalse
# worker.wlb.method=3DRequest
# worker.wlb.lock=3DOptimistic

###########################################################################=
###
# Defining the status workers
###########################################################################=
###
# A read-only status worker
worker.jkwatch.type=3Dstatus
worker.jkwatch.read_only=3DTrue
worker.jkwatch.mount=3D/private/admin/watch/jk
# A managing status worker
# worker.jkmanage.type=3Dstatus
# worker.jkmanage.mount=3D/private/admin/manage/jk
###########################################################################=
###
## Balanced Workers (Tomcat Workers)
###########################################################################=
###
###########################################################################=
###
# Tomcat Worker (tomcatserver1)
###########################################################################=
###
worker.tomcatserver1.type=3Dajp13
worker.tomcatserver1.host=3Dlocalhost
worker.tomcatserver1.port=3D8009
worker.tomcatserver1.lbfactor=3D1
# Connection pool timeout is set in seconds. (10 minutes). If you modify th=
is
# value, you need to modify the AJP connector in the Tomcat server.xml to
# match this value. Note that the value in Tomcat must be specified in mill=
iseconds.
worker.tomcatserver1.connection_pool_timeout=3D600
worker.tomcatserver1.socket_keepalive=3DTrue
worker.tomcatserver1.socket_timeout=3D60
## worker.tomcatserver1.socket_connect_timeout=3D60
#
# Apache will wait 30 seconds (30,000 ms) for Tomcat to respond, otherwise
# it will return error "504 - Gateway timeout" to the client
worker.tomcatserver1.reply_timeout=3D30000
#
# This recovery_options attribute is a bit mask.
# The following bits are allowed:
#  1: don't recover if Tomcat failed after getting the request
#  2: don't recover if Tomcat failed after sending the headers to client
#  4: close the connection to Tomcat, if we detect an error when writing ba=
ck the answer to the client (browser)
#  8: always recover requests for HTTP method HEAD (even if Bits 1 or 2 are=
 set)
# 16: always recover requests for HTTP method GET (even if Bits 1 or 2 are =
set)
# We will set it to 27, equivalent to the binary 11011
worker.tomcatserver1.recovery_options=3D27
###########################################################################=
###
# Tomcat Worker (tomcatserver2)
###########################################################################=
###
worker.tomcatserver2.type=3Dajp13
worker.tomcatserver2.host=3Dlocalhost
worker.tomcatserver2.port=3D7009
worker.tomcatserver2.lbfactor=3D1
# Connection pool timeout is set in seconds. (10 minutes). If you modify th=
is
# value, you need to modify the AJP connector in the Tomcat server.xml to
# match this value. Note that the value in Tomcat must be specified in mill=
iseconds.
worker.tomcatserver2.connection_pool_timeout=3D600
worker.tomcatserver2.socket_keepalive=3DTrue
worker.tomcatserver2.socket_timeout=3D60
## worker.tomcatserver2.socket_connect_timeout=3D60
#
# Apache will wait 30 seconds (30,000 ms) for Tomcat to respond, otherwise
# it will return error "504 - Gateway timeout" to the client
worker.tomcatserver2.reply_timeout=3D30000
#
# This recovery_options attribute is a bit mask.
# The following bits are allowed:
#  1: don't recover if Tomcat failed after getting the request
#  2: don't recover if Tomcat failed after sending the headers to client
#  4: close the connection to Tomcat, if we detect an error when writing ba=
ck the answer to the client (browser)
#  8: always recover requests for HTTP method HEAD (even if Bits 1 or 2 are=
 set)
# 16: always recover requests for HTTP method GET (even if Bits 1 or 2 are =
set)
# We will set it to 27, equivalent to the binary 11011
worker.tomcatserver2.recovery_options=3D27


-----Original Message-----
From: breako [mailto:alex.staveley@fineos.com]=20
Sent: Tuesday, November 03, 2009 1:35 PM
To: users@tomcat.apache.org
Subject: Problem forward HTTP / Soap request using mod_jk


Hi,
I have two tomcat servers and I can make them talk to each other using soap=
 / http no problem.

However, when I put Apache infront of one my tomcat servers and set it up t=
o forward http requests to the tomcat server it doesn't get any requests.

I am using the mod_jk to achieve the forwarding. I have tested other types =
of http forwarding, and they are all ok.=20

So I am confident, I have my workers.properties, ajp ports etc set up ok.

I am getting no error messages in my mod_jk logfile.

I wonder can mod_jk only forward only certain types of http requests?

Any ideas?

Apache Http Server: Apache/2.0.47
Tomcat Version: Tomcat/5.5.12

I have to use these versions for the project I am working on.

thanks.

httpd.conf

...

# Load the jk module.
LoadModule jk_module modules/mod_jk.so

# Specify the workers.properties file location # This is where the tomcat i=
nstances are defined JkWorkersFile conf/workers.properties
JkLogFile     logs/mod_jk.log
JkLogLevel    error
JkLogStampFormat "[%a %b %d %H:%M:%S %Y] "
JkRequestLogFormat "%B %H %r %s %w %V %T"

# Set up the URLs for request forwarding.
JkMount /HelloWorld/* worker2
JkMount /* worker2
JkMount /docy worker2

Workers.properties

...
# Define 1 real worker using ajp13
worker.list=3Dworker2

# Set properties for worker2 (ajp13)
worker.worker2.type=3Dajp13
worker.worker2.host=3Dlocalhost
worker.worker2.port=3D23009
worker.worker2.lbfactor=3D1

Cheers


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Soap-request-using-mod_jk-tp26160709p26160709.html
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