Does the same thing happen if you're using hot deploying under Tomcat? I've recently left a lead architect position at another company, where the 'DAO layer' was basically SAP JCO calls. I never had the issue you're getting here. I never tried jetty however, the code was based on a version of Equinox about 3 years old, so it was Ant, and we used Tomcat locally for testing before deploying to a remote SAP Netweaver server.
caius_swopes wrote: > > I'm using the SAP JCO connector. I have only one appfuse application > running on one jetty server There are two dll files that must be placed > in the system32 folder for the JCO connector to work. One of those dll > files is named sapjcorfc.dll. > My application works fine when I do mvn jetty:run. The problem occurs > when the maven-jetty-plugin redeploys the server due to a change to a > file. From what I gather from other forums including the sap forum (see > this thread: https://www.sdn.sap.com/irj/sdn/thread?threadID=15622 ), > sapjcorfc.dll does not like to be loaded more than once "per machine". > Since I can completely restart maven with everything working fine and only > a hot redeploy causes problems, I assume that in an appfuse/jetty/maven > context this would mean "per server startup". Is there anyway for me to > tell the class loader, upon hot redeploy, to not load the dll file? > > I'm not sure if this has anything to do with the problem but I found > something odd in the error below. If you look at the java.library.path > there are extra entries that are not part of my path environment variable. > > Here are my system path environment variables (where > system.root=C:\WINDOWS): > %SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;D:\IBM\CLIENT~1;D:\IBM\CLIENT~1\Shared;D:\IBM\CLIENT~1\Emulator;C:\Program > Files\Common Files\Adaptec > Shared\System;D:\QuickTime\QTSystem\;%JAVA6_HOME%\bin;%ANT_HOME%\bin;%CATALINA_HOME%\bin;%MYSQL_HOME%\bin;%JAVAEE_HOME%\bin;D:\md5sum.exe;%JAVA_HOME%\bin;%MAVEN_HOME%\bin;%JETTY_HOME%\bin;%JETTY_HOME%;%ANT_OPTS%;d:\Program > Files\Subversion\bin > > Here is the error: > > 2007-11-15 11:28:50.995::WARN: EXCEPTION > java.lang.ExceptionInInitializerError: JCO.classInitialize(): Could not > load mid > dleware layer 'com.sap.mw.jco.rfc.MiddlewareRFC' > JCO.nativeInit(): Could not initialize dynamic link library sapjcorfc > [Native Li > brary C:\WINDOWS\system32\sapjcorfc.dll already loaded in another > classloader]. > java.library.path > [C:\Java\jdk1.5.0\bin;.;C:\WINDOWS\system32;C:\WINDOWS;C:\WIND > OWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;D:\IBM\CLIENT~1;D:\IBM\CLIENT~1 > \Shared;D:\IBM\CLIENT~1\Emulator;C:\Program Files\Common Files\Adaptec > Shared\Sy > stem;D:\QuickTime\QTSystem\;C:\Java\jdk1.6.0\bin;D:\apache-ant-1.7.0\bin;D:\wamp > \tomcat\bin;D:\wamp\mysql\bin;C:\Sun\SDK\bin;D:\md5sum.exe;C:\Java\jdk1.5.0\bin; > D:\maven-2.0.7\bin;D:\jetty-6.1.5\bin;D:\jetty-6.1.5;-Xmx1536M;d:\Program > Files\ > Subversion\bin;C:\Sun\SDK\bin] > at com.sap.mw.jco.JCO.<clinit>(JCO.java:776) > at > com.amersports.extranet.webapp.servlet.JCOConnectionServlet.init(JCOC > onnectionServlet.java:37) > at javax.servlet.GenericServlet.init(GenericServlet.java:241) > at > org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.jav > a:433) > at > org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:25 > 6) > at > org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java: > 40) > at > org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.ja > va:612) > at > org.mortbay.jetty.servlet.Context.startContext(Context.java:139) > at > org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.jav > a:1218) > at > org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java: > 500) > at > org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448 > ) > at > org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java: > 40) > at > org.mortbay.jetty.plugin.Jetty6PluginWebApplication.start(Jetty6Plugi > nWebApplication.java:144) > at > org.mortbay.jetty.plugin.AbstractJettyRunMojo$1.filesChanged(Abstract > JettyRunMojo.java:423) > at org.mortbay.util.Scanner.reportBulkChanges(Scanner.java:456) > at org.mortbay.util.Scanner.reportDifferences(Scanner.java:327) > at org.mortbay.util.Scanner.scan(Scanner.java:254) > at org.mortbay.util.Scanner$1.run(Scanner.java:225) > at java.util.TimerThread.mainLoop(Timer.java:512) > at java.util.TimerThread.run(Timer.java:462) > > Thanks > Caius > > -- View this message in context: http://www.nabble.com/Is-there-any-way-to-tell-the-ClassLoader-to-not-load-a-class-upon-redeploy--tf4816518s2369.html#a13781112 Sent from the AppFuse - User mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
