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From Andreas Veithen <>
Subject Re: archive lib directory and 3rd party libraries (axis2/tomcat 6)
Date Mon, 25 Jan 2010 18:53:19 GMT
Try adding the following parameter on the service:

<parameter name="ServiceTCCL" locked="false">composite</parameter>


On Mon, Jan 25, 2010 at 18:22, Charles Galpin <> wrote:
> Hi All
> I am still running into problems with this.  I previously moved all the jars
> I needed into the WEB-INF/lib directory and was able to continue working.
> But as I add more services (more .aar files) I am now running into strange
> unpredictable differences that I do not understand.
> For example, I have two services packaged in their own .aar files and if
> deployed independently they run just fine. Simply deploying both together
> causes the second one loaded to have mysterious problems like a
> java.sql.SQLException "no suitable driver found for jdbc:sqlserver://.."
> when the sql3jdbc jar file is in both the .aar and WEB-INF/lib directory and
> (and as I said works fine standalone).
> Does anyone have any advice on how to get my services to run together
> happily? Assume I am not concerned with isolating each service from each
> other in terms of security.  I read on Amila's blog that some class loading
> settings can be modified but it's not clear exactly what ramifications it
> will have or if it will even help my problems.
> I am not sure if this is causing my problems, but due to wanting to be able
> to override the properties file in the .aar file when deployed in different
> environments, in the service lifecycle init method I attempt to find the
> properties file in the axis classpath before trying the .arr, using first
> axisService.getClass().getClassLoader(0.gerResourceAsStream(propsFilename);
> and if not found then using
> this.getClass().getClassLoader(0.gerResourceAsStream(propsFilename);
> Could this be messing up the class loading sequence, and if yes, how can I
> achieve the same effect without using the axis class loader first?
> thanks,
> charles
> On Dec 1, 2009, at 2:29 PM, Charles Galpin wrote:
> Hi Sameera
> Ok, this is starting to make a little more sense. I was not aware the
> WebappClassLoader could not see classes in the .aar. Can this be changed?
> I have access to the source of the client.corba.* packages, but they are
> just calling org.omg.CORBA.ORB.init which is doing the class loading and
> thats from rt.jar in the java distro afaik. The ORB loaded is a configurable
> option which is why it uses the class loader.
> Here is another exception stack you may find useful. I had run into this
> problem as well as various other classes not loading a while ago and made a
> few changes until getting my service working, and one of them was to pass
> -Djava.library.path="%PATH%;blahblah" in on the commandline when starting
> tomcat. Removing this changes the error to a perhaps little more revealing
> message (after understanding about the TCCL limitation)
> 13:38:58 ERROR- Error initializing CORBA ORB. Unexpected CORBA error.
> org.omg.CORBA.INITIALIZE: can't instantiate default ORB implementation
> org.jacorb.orb.ORB  vmcid: 0x0  minor code: 0  completed: No
> 13:38:58 DEBUG- Stack trace: org.omg.CORBA.INITIALIZE: can't instantiate
> default ORB implementation org.jacorb.orb.ORB  vmcid: 0x0  minor code: 0
>  completed: No
>         at org.omg.CORBA.ORB.create_impl(
>         at org.omg.CORBA.ORB.init(
>         at client.corba.BaseCORBAApp.initCORBA(
>         at
> client.corba.BaseCORBAService.startService(
>         at
> client.project.dcol.publish.corba.WebServiceDataCollectionService.webInit(
>         at
> client.project.dcol.GDPI.ServiceBase$
>         at
> Caused by: java.lang.ClassNotFoundException: org.jacorb.orb.ORB
>         at
> org.apache.catalina.loader.WebappClassLoader.loadClass(
>         at
> org.apache.catalina.loader.WebappClassLoader.loadClass(
>         at java.lang.ClassLoader.loadClassInternal(
>         at java.lang.Class.forName0(Native Method)
>         at java.lang.Class.forName(
>         at org.omg.CORBA.ORB.create_impl(
>         ... 6 more
> 13:38:58 ERROR- Aborted due to startup failure.
> Aborted due to startup failure: Error initializing CORBA ORB. Unexpected
> CORBA error.
> Is there any other way to work around this other than putting the libraries
> in the axis2/WEB-INF/lib directory? To be clear I have other problems beside
> this. A good example is we have a custom log4j appender we use which is in
> Shared.jar. This cannot be found either unless it's in axis2/WEB-INF/lib but
> your description explains that one too.
> thanks,
> charles
> On Dec 1, 2009, at 1:28 PM, Sameera Jayasoma wrote:
> Hi Charles
> On Tue, Dec 1, 2009 at 11:27 PM, Charles Galpin <> wrote:
>> Hi Sameera
>> Yes this is what is happening and what is expected. The
>> org.omg.CosNotifyFilter.InvalidGrammar class is in jacorb.jar which is in
>> the .aar lib directory. What am I missing? Are you saying it should not be
>> in the thread context class loader?
> The class BaseCORBAApp is trying to loadInvalidGrammar class from the TCCL
> and in this scenario TCCL is set to the WebappClassLoader. Classes in your
> aar lib folder cannot be seen by the WebappClassLoader. It can only see the
> classes in axis2/WEB-INF/lib folder or in the application classpath
> tomcat/lib. That is things work nicely when you put jacob.jar to
> axis2/WEB-INF/lib.
> Do you have access to sources of the classes in client.corba.* packages.
> Thanks
> sameera
>> On Dec 1, 2009, at 12:47 PM, Sameera Jayasoma wrote:
>> > It seems that "BaseCORBAApp" class is trying to load
>> > "org.omg.CosNotifyFilter.InvalidGrammar" from the thread context class
>> > loader. That is why you see following lines in the exception log.
>> >
>> >  at
>> > org.apache.catalina.loader.WebappClassLoader.loadClass(
>> >  at
>> > org.apache.catalina.loader.WebappClassLoader.loadClass(
>> >
>> >  This is a usual practice of loading application libraries. If you have
>> > access to the source code of client.corba classes, you can verify this.
>> >
>> > Thanks
>> > Sameera
>> Thanks Olindo, but the first error (see the bottom of the trace) is
>> java.lang.ClassNotFoundException which I believe is the root cause. I have
>> checked and jacorb.jar is not in the path or classpath.
>> On Dec 1, 2009, at 11:55 AM, Olindo Pindaro wrote:
>> > The exception  isn't "ClassNotFound" but "NoClassDefFoundError", that in
>> > my experience is caused by conflit in differente version of library present
>> > in compiler path and classloaderpath.
>> thanks,
>> charles
> --
> Sameera Jayasoma
> Software Engineer
> WSO2 Inc.
> Oxygenating the Web Service Platform.
> blog:

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