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
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