I did a bit more research and found the two areas of concern. Would
appreciate any comments or insights into how to resolve this.
1) First there were 37 waiting threads in the thread pool. There were and
additional 22 that were in Object.wait on a "read" in the JK code. There was
one that was "waiting for monitor" in JK code, but the monitor wait was in
Log4J code. Here are my apache settings, do they suggest a problem in
settings?
/etc/httpd/conf/httpd.conf
StartServers 8
MinSpareServers 5
MaxSpareServers 20
MaxClients 150
MaxRequestsPerChild 1000
/etc/httpd/conf.d/jk.conf
LoadModule jk_module modules/mod_jk.so
<IfModule mod_jk.c>
JkWorkersFile "/etc/httpd/conf/workers.properties"
JkLogFile "/etc/httpd/logs/mod_jk.log"
JkLogLevel error
JkLogStampFormat "[%a %b %d %H:%M:%S %Y] "
</IfModule>
/etc/httpd/conf/workers.properties
workers.tomcat_home=/var/tomcat
ps=/
worker.list=tomcat-dev,tomcat-prod
worker.tomcat-dev.type=ajp13
worker.tomcat-dev.port=7009
worker.tomcat-dev.host=localhost
worker.tomcat-dev.lbfactor=1
worker.tomcat-prod.type=ajp13
worker.tomcat-prod.port=8009
worker.tomcat-prod.host=localhost
worker.tomcat-prod.lbfactor=1
/var/tomcat/conf/server.xml
<Service name="Tomcat-Standalone">
<Connector className="org.apache.coyote.tomcat4.CoyoteConnector"
port="8080" minProcessors="5" maxProcessors="75"
enableLookups="true" redirectPort="8443"
acceptCount="100" debug="0" connectionTimeout="20000"
useURIValidationHack="false" disableUploadTimeout="true"
/>
<Connector className="org.apache.coyote.tomcat4.CoyoteConnector"
port="8009" minProcessors="5" maxProcessors="75"
enableLookups="true" redirectPort="8443"
acceptCount="10" debug="0" connectionTimeout="0"
useURIValidationHack="false"
protocolHandlerClassName="org.apache.jk.server.JkCoyoteHandler"/>
<Engine name="Standalone" defaultHost="localhost" debug="0">
<Logger className="org.apache.catalina.logger.FileLogger"
prefix="catalina_log." suffix=".txt"
timestamp="true"/>
<Realm className="org.apache.catalina.realm.UserDatabaseRealm"
debug="0" resourceName="UserDatabase"/>
<Host name="localhost" debug="0" appBase="webapps"
unpackWARs="true" autoDeploy="true">
<Logger className="org.apache.catalina.logger.FileLogger"
directory="logs" prefix="localhost_log." suffix=".txt"
timestamp="true"/>
</Host>
<Host name="acme1.com" debug="0" autoDeploy="false"
appBase="/home/httpd/vhosts/firedrummarketing.com">
...
2) Below are the threads that were accessing Log4J code. Could they be
causing a problem? One was "waiting for monitor" and the other was
"runnable".
Thanks again for any ideas on this.
"Thread-20" daemon prio=1 tid=0x080e4a18 nid=0x1227 waiting for monitor
entry [0x7d843000..0x7d844800]
at org.apache.log4j.Category.callAppenders(Category.java:201)
- waiting to lock <0x49e331d8> (a org.apache.log4j.Logger)
at org.apache.log4j.Category.forcedLog(Category.java:388)
at org.apache.log4j.Category.log(Category.java:853)
at
org.apache.commons.logging.impl.Log4JLogger.debug(Log4JLogger.java:110)
at org.apache.jk.common.JkInputStream.doRead(JkInputStream.java:277)
at
org.apache.jk.server.JkCoyoteHandler.doRead(JkCoyoteHandler.java:231)
at org.apache.coyote.Request.doRead(Request.java:431)
at
org.apache.coyote.tomcat4.CoyoteInputStream.readBytes(CoyoteInputStream.java
:199)
at
org.apache.coyote.tomcat4.CoyoteInputStream.read(CoyoteInputStream.java:156)
at com.jspsmart.upload.SmartUpload.upload(SmartUpload.java:224)
at
org.apache.jsp.uploadProcess_jsp._jspService(uploadProcess_jsp.java:72)
at
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:137)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:2
04)
at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:247)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:193)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja
va:260)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja
va:191)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180
)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.
java:170)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:641)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172
)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:641)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java
:174)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
at
org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:261)
at
org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:360)
at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:632)
at
org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:590)
at
org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:707)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.jav
a:530)
at java.lang.Thread.run(Thread.java:595)
...
"Thread-163" daemon prio=1 tid=0x088a9118 nid=0x41bc runnable
[0x7f102000..0x7f103680]
at org.apache.log4j.Category.callAppenders(Category.java:201)
- waiting to lock <0x49e331d8> (a org.apache.log4j.Logger)
at org.apache.log4j.Category.forcedLog(Category.java:388)
at org.apache.log4j.Category.log(Category.java:853)
at
org.apache.commons.logging.impl.Log4JLogger.debug(Log4JLogger.java:110)
at org.apache.jk.common.JkInputStream.doRead(JkInputStream.java:277)
at
org.apache.jk.server.JkCoyoteHandler.doRead(JkCoyoteHandler.java:231)
at org.apache.coyote.Request.doRead(Request.java:431)
at
org.apache.coyote.tomcat4.CoyoteInputStream.readBytes(CoyoteInputStream.java
:199)
at
org.apache.coyote.tomcat4.CoyoteInputStream.read(CoyoteInputStream.java:156)
at com.jspsmart.upload.SmartUpload.upload(SmartUpload.java:224)
at
org.apache.jsp.uploadProcess_jsp._jspService(uploadProcess_jsp.java:72)
at
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:137)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:2
04)
at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:247)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:193)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja
va:260)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja
va:191)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180
)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.
java:170)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:641)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172
)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:641)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java
:174)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
at
org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:261)
at
org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:360)
at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:632)
at
org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:590)
at
org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:707)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.jav
a:530)
at java.lang.Thread.run(Thread.java:595)
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