RE: Major Tomcat classloading issues with javaagent command line switch
I've tried this outside Eclipse with Tomcat 6.0.26 on both Java 1.5.0_22 and Java 1.6.0_18: SET JAVA_OPTS=-javaagent:C:\path-to-agent.jar JSP's seem to work fine, but anytime you try to access a Servlet you get the same thing: javax.servlet.ServletException: Error allocating a servlet instance org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java :102) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:2 98) org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.j ava:859) org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.proce ss(Http11AprProtocol.java:579) org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1555) java.lang.Thread.run(Thread.java:619) java.lang.NoClassDefFoundError: javax/servlet/http/HttpServlet java.lang.ClassLoader.findBootstrapClass(Native Method) java.lang.ClassLoader.findBootstrapClassOrNull(ClassLoader.java:927) java.lang.ClassLoader.loadClass(ClassLoader.java:298) java.lang.ClassLoader.loadClass(ClassLoader.java:296) sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) java.lang.ClassLoader.loadClass(ClassLoader.java:248) org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader .java:1431) org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader .java:1361) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java :102) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:2 98) org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.j ava:859) org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.proce ss(Http11AprProtocol.java:579) org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1555) java.lang.Thread.run(Thread.java:619) Can anyone else confirm? Arshan -Original Message- From: Caldarale, Charles R [mailto:chuck.caldar...@unisys.com] Sent: Tuesday, April 06, 2010 12:34 AM To: Tomcat Users List Subject: RE: Major Tomcat classloading issues with javaagent command line switch From: Arshan Dabirsiaghi [mailto:arshan.dabirsia...@aspectsecurity.com] Subject: Major Tomcat classloading issues with javaagent command line switch The bottom line appears to be this: across Tomcat and JDK versions, you can't use the javaagent switch and have a working web app. Wrong conclusion. Try running Tomcat directly, not under Eclipse; the problem you're having is most likely due to Eclipse insisting on doing things its own way, ignoring configuration that you have set up. Deploy your war to a stand-alone Tomcat and try it again. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Major Tomcat classloading issues with javaagent command line switch
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Arshan, On 4/6/2010 12:04 AM, Arshan Dabirsiaghi wrote: The bottom line appears to be this: across Tomcat and JDK versions, you can't use the javaagent switch and have a working web app. This works for me under the following environment: $ bin/catalina.sh version Using CATALINA_BASE: /usr/local/apache-tomcat-6.0.26 Using CATALINA_HOME: /usr/local/apache-tomcat-6.0.26 Using CATALINA_TMPDIR: /usr/local/apache-tomcat-6.0.26/temp Using JRE_HOME:/usr Using CLASSPATH: /usr/local/apache-tomcat-6.0.26/bin/bootstrap.jar Server version: Apache Tomcat/6.0.26 Server built: March 9 2010 1805 Server number: 6.0.26.0 OS Name:Linux OS Version: 2.6.18-14-fza-686-bigmem Architecture: i386 JVM Version:1.6.0_12-b04 JVM Vendor: Sun Microsystems Inc. The command line for my running JVM looks like this: /usr/bin/java -Dnop -Xmx64M - -agentpath:/home/cschultz/yjp-8.0.6/bin/linux-x86-32/libyjpagent.so= - -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager - -Djava.endorsed.dirs=/usr/local/apache-tomcat-6.0.26/endorsed -classpath /usr/local/apache-tomcat-6.0.26/bin/bootstrap.jar - -Dcatalina.base=/home/cschultz/.webapps/xxx - -Dcatalina.home=/usr/local/apache-tomcat-6.0.26 - -Djava.io.tmpdir=/home/cschultz/.webapps/xxx/temp org.apache.catalina.startup.Bootstrap start What does yours look like? - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAku7UNUACgkQ9CaO5/Lv0PCxFwCfa5/zxoTvyYF5x9/sNy2STxGY Pb8AoIMd66jZvvTqqmu1yTZzg2/+U0Np =8BCW -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Major Tomcat classloading issues with javaagent command line switch
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Arshan, On 4/6/2010 11:18 AM, Christopher Schultz wrote: The command line for my running JVM looks like this: /usr/bin/java -Dnop -Xmx64M -agentpath:/home/cschultz/yjp-8.0.6/bin/linux-x86-32/libyjpagent.so= Sorry, I didn't see that you were using a Java-language agent. I haven't tried this. - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAku7WDUACgkQ9CaO5/Lv0PBGTACdG2gUuUsT55SlfDKKOGgagp27 qG4An2LtLnwavrnj79jPJ6oUwQZowhhW =Mx79 -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
RE: Major Tomcat classloading issues with javaagent command line switch
Just to close the loop here, the problem was that the class was being loaded twice - once from inside the *agent* jar, and another duplicate later from WEB-INF/classes. I guess Tomcat or Java was confused as to which version they wanted to use. Not 100% sure what happened, but removing it from the agent jar fixed the problem. Thanks! Arshan -Original Message- From: Christopher Schultz [mailto:ch...@christopherschultz.net] Sent: Tuesday, April 06, 2010 11:50 AM To: Tomcat Users List Subject: Re: Major Tomcat classloading issues with javaagent command line switch -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Arshan, On 4/6/2010 11:18 AM, Christopher Schultz wrote: The command line for my running JVM looks like this: /usr/bin/java -Dnop -Xmx64M -agentpath:/home/cschultz/yjp-8.0.6/bin/linux-x86-32/libyjpagent.so= Sorry, I didn't see that you were using a Java-language agent. I haven't tried this. - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAku7WDUACgkQ9CaO5/Lv0PBGTACdG2gUuUsT55SlfDKKOGgagp27 qG4An2LtLnwavrnj79jPJ6oUwQZowhhW =Mx79 -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Major Tomcat classloading issues with javaagent command line switch
2010/4/7 Arshan Dabirsiaghi arshan.dabirsia...@aspectsecurity.com: Just to close the loop here, the problem was that the class was being loaded twice - once from inside the *agent* jar, and another duplicate later from WEB-INF/classes. I guess Tomcat or Java was confused as to which version they wanted to use. Not 100% sure what happened, but removing it from the agent jar fixed the problem. The servlet spec requires that the webapp classes and libraries were preferred over the ones provided by Tomcat. More details in [1]At the same time, web applications are short-lived and can be stopped / undeployed at any time, at which point their classloader and their classes become unavailable. Using those for something that is JVM-wide may lead to leaked memory at best, or do not work at all. [1] http://tomcat.apache.org/tomcat-6.0-doc/class-loader-howto.html Best regards, Konstantin Kolinko - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
RE: Major Tomcat classloading issues with javaagent command line switch
From: Arshan Dabirsiaghi [mailto:arshan.dabirsia...@aspectsecurity.com] Subject: Major Tomcat classloading issues with javaagent command line switch The bottom line appears to be this: across Tomcat and JDK versions, you can't use the javaagent switch and have a working web app. Wrong conclusion. Try running Tomcat directly, not under Eclipse; the problem you're having is most likely due to Eclipse insisting on doing things its own way, ignoring configuration that you have set up. Deploy your war to a stand-alone Tomcat and try it again. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
