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From Munirathinavel <munirathina...@gmail.com>
Subject Writing to client aborted or client network problems...
Date Mon, 01 Mar 2010 12:59:12 GMT

Hi to all...
        
I'm using apache2.2 + tomcat6.0.18 + mod_jk1.2.28 for our portal.While doing
load test with 20 & more users, I try to access the application through
browser but pages are getting loaded and in mod_jk.log file I'm getting the
following message,

[Fri Feb 26 12:50:25 2010][304:728] [info] jk_ajp_common.c (1788): Writing
to client aborted or client network problems
[Fri Feb 26 12:50:25 2010][304:728] [info] jk_ajp_common.c (2447): (worker1)
sending request to tomcat failed (unrecoverable), because of client write
error (attempt=1)
[Fri Feb 26 12:50:25 2010]worker1 216.205.107.50 30.218750
[Fri Feb 26 12:50:25 2010][304:728] [info] mod_jk.c (2608): Aborting
connection for worker=worker1
 
	  I'm using the following files in Tomcat & Apache.

	workers.properties:

		workers.tomcat_home=D:/tomcat6.0.18
		workers.java_home=C:/Program Files/Java/jdk1.6.0_16

	ps=/


	worker.list=worker1
			worker.worker1.type=ajp13
			worker.worker1.host=xxxxxxxxxxxx
			worker.worker1.port=8009
			worker.worker1.connection_pool_timeout=600
			worker.worker1.connect_timeout=60000
			worker.worker1.prepost_timeout=60000
			worker.worker1.socket_keepalive=1
			worker.worker1.socket_timeout=60
			worker.worker1.lbfactor=1
	worker.loadbalancer.type=lb
	worker.loadbalancer.balance_workers= worker1
	worker.inprocess.type=jni

	server.xml:
	<Server port="8006" shutdown="SHUTDOWN">
	  <Listener className="org.apache.catalina.core.AprLifecycleListener"
SSLEngine="on" />
	  <Listener className="org.apache.catalina.core.JasperListener" />
	  <Listener className="org.apache.catalina.mbeans.ServerLifecycleListener"
/>
	  <Listener
className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />
	  <GlobalNamingResources>
	    <Resource name="UserDatabase" auth="Container"
		      type="org.apache.catalina.UserDatabase"
		      description="User database that can be updated and saved"
		      factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
		      pathname="conf/tomcat-users.xml" />
	  </GlobalNamingResources>
	  <Service name="Catalina">
		<Connector debug="0" enableLookups="false" port="8009" protocol="AJP/1.3"
		 maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
acceptCount="100"
		  minProcessors="5" maxProcessors="100" connectionTimeout="60000"
disableUploadTimeout="true" redirectPort="8443"/>
	   <Engine name="Catalina" defaultHost="xxxxxxxxxxxx" debug="0" >
	      <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
		     resourceName="UserDatabase"/>
	      <Host name="xxxxxxxxxxxx"  appBase="gateway"
		    unpackWARs="true" autoDeploy="true"
		    xmlValidation="false" xmlNamespaceAware="false">

				<Listener className = "org.apache.jk.config.ApacheConfig"
workersConfig="conf/workers.properties"
modJk="D:/Apache2.2/modules/mod_jk.so" jkLog="logs/mod_jk.log"
jkDebug="info" noRoot="false"/>
	      </Host>
	    </Engine>
	  </Service>
	       
	</Server>

	context.xml:
	<?xml version='1.0' encoding='utf-8'?>

	 
	   <Context>

		 <WatchedResource>WEB-INF/web.xml</WatchedResource>
	    <Resource name="jdbc/vehrentDB" auth="Container"
	      type="javax.sql.DataSource"
		  maxActive="50"
	      maxIdle="10"
			minIdle="30"
		  username="xxxxxxxxxxxx" password="xxxxxxxxxxxx"      
			driverClassName="com.microsoft.sqlserver.jdbc.SQLServerDriver"
		     url="jdbc:sqlserver://xxxxxxxxxxxx:1433;      
			databaseName=xxxxxxxxxxxx;user=xxxxxxxxxxxx;password=xxxxxxxxxxxx;"
	      numTestsPerEvictionRun="15"     
timeBetweenEvictionRunsMillis="900000"
		minEvictableIdleTimeMillis="900000"
			testWhileIdle="true"
			testOnBorrow="false"    
			removeAbandoned="true"
			removeAbandonedTimeout="300"
	      logAbandoned="true"
		/>
		<Resource name="jdbc/empowerDB" auth="Container"
	      type="javax.sql.DataSource"
			maxActive="8"
			maxIdle="4"
			minIdle="2"
			username="xxxxxxxxxxxx" password="xxxxxxxxxxxx"
			driverClassName="com.microsoft.sqlserver.jdbc.SQLServerDriver"
	     
url="jdbc:sqlserver://xxxxxxxxxxxx:1433;databaseName=xxxxxxxxxxxx;user=xxxxxxxxxxxx;password=xxxxxxxxxxxx;"
		    numTestsPerEvictionRun="15"
			timeBetweenEvictionRunsMillis="900000"
		    minEvictableIdleTimeMillis="900000"
			testWhileIdle="true"
	      testOnBorrow="false"
		    removeAbandoned="true"
			removeAbandonedTimeout="300"
	      logAbandoned="true"
		/>
	</Context>

	virtual-host.conf:
	NameVirtualHost *:80
	<VirtualHost *:80>
	    ServerAdmin xxxxxxxxxx
	    DocumentRoot "D:/Apache2.2/htdocs/gateway"
	    ServerName xxxxxxxxxx
	    ServerAlias xxxxxxxxxx
	    ErrorLog "logs/gateway-error.log"
	    CustomLog "logs/gateway-access.log" common

	    JkMount /* worker1
	    JkUnMount /*js/*.js worker1
	    JkUnMount /*.jpeg worker1
	    JkUnMount /*.png worker1
	    JkUnMount /*.gif worker1
	    JkUnMount /*.html worker1
	    JkUnMount /*.jpg worker1
	    JkUnMount /*.css worker1
	    JkUnMount /*.swf worker1
	</VirtualHost>
	       
	      I've been struggling with this for a week.Can anyone please tell me
what can i do to get rid of that problem & make my application accessible
for 20 & more concurrent users.
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