CLASSPATH issues on DOS/NT and loading of jar files

Hello all,
I have the following problem on running WebLogic 5.1 on
NT. The CLASSPATH is getting truncated after a certain number of
characters. I have a lot of third party jar files that I use in my
application. How do I overcome this problem ? I tried increasing my DOS
environment space by changing the default values in config.sys.
What are other alternatives ?
One idea that I have is to use URLClassLoader to load the jar files. I
am running a RMI based application and I need to load these jar files
before I load the RMI code. Where would I run this URLClassLoader code
? Is there some system startup class that can load jar files ?
Thanks,
Aswin.

Thanks for the reply. I much appreciate it. What about the other idea that I
had outlined-loading these jar files using a ClassLoader. Is that viable ?
Aswin.
Cameron Purdy wrote:
In Win2k: Control Panel, System, Advanced, Environment Variables
ComSpec=%SystemRoot%\system32\cmd.exe /e:16384
You still will not be able to have a command line exceeding a certain size
(around 1k or so). That is a hardcoded limit somewhere inside the NT kernel
("kernel" being a poor term for the piece so named in NT ;-).
Peace,
Cameron Purdy
Tangosol, Inc.
http://www.tangosol.com
Tangosol: How Weblogic applications are customized
"Aswin Dinakar" <[email protected]> wrote in message
news:[email protected]..
Hello all,
I have the following problem on running WebLogic 5.1 on
NT. The CLASSPATH is getting truncated after a certain number of
characters. I have a lot of third party jar files that I use in my
application. How do I overcome this problem ? I tried increasing my DOS
environment space by changing the default values in config.sys.
What are other alternatives ?
One idea that I have is to use URLClassLoader to load the jar files. I
am running a RMI based application and I need to load these jar files
before I load the RMI code. Where would I run this URLClassLoader code
? Is there some system startup class that can load jar files ?
Thanks,
Aswin.

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## Detail 0 ##
oracle.jbo.JboException: JBO-33001: Cannot find the configuration file infra\mainmenu\bc4j\common\bc4j.xcfg in the classpath
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     void javax.servlet.http.HttpServlet.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse)
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## Detail 0 ##
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     void oracle.jbo.client.Configuration.loadFromStream(java.io.InputStream)
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     void oracle.jbo.client.Configuration.loadFromClassPath(java.lang.String)
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     oracle.jbo.common.ampool.SessionCookie oracle.cabo.data.jbo.servlet.RootAppModuleRegistryImpl.getSessionCookie(oracle.cabo.servlet.BajaContext, oracle.cabo.data.jbo.def.RootAppModuleDef)
     oracle.jbo.ApplicationModule oracle.cabo.data.jbo.servlet.RootAppModuleRegistryImpl.useRootAppModule(oracle.cabo.servlet.BajaContext, oracle.cabo.data.jbo.def.RootAppModuleDef)
     oracle.jbo.ApplicationModule oracle.cabo.data.jbo.servlet.RootAppModuleRegistryImpl.useRootAppModule(oracle.cabo.servlet.BajaContext, java.lang.String)
     void oracle.cabo.data.jbo.servlet.RootAppModuleRegistryImpl.useAll(oracle.cabo.servlet.BajaContext)
     void oracle.cabo.data.jbo.xml.parse.JboParserExtensionImpl$JboPageDescription.renderStarted(oracle.cabo.servlet.BajaContext, oracle.cabo.servlet.Page, oracle.cabo.ui.RenderingContext)
     void oracle.cabo.servlet.ui.UINodePageRenderer.renderPage(oracle.cabo.servlet.BajaContext, oracle.cabo.servlet.Page)
     void oracle.cabo.servlet.AbstractPageBroker.renderPage(oracle.cabo.servlet.BajaContext, oracle.cabo.servlet.Page)
     oracle.cabo.servlet.Page oracle.cabo.servlet.PageBrokerHandler.handleRequest(oracle.cabo.servlet.BajaContext)
     void oracle.cabo.servlet.UIXServlet.doGet(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
     void javax.servlet.http.HttpServlet.service(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
          HttpServlet.java:740
     void javax.servlet.http.HttpServlet.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse)
          HttpServlet.java:853
     void com.evermind[Oracle9iAS (9.0.3.0.0) Containers for J2EE].server.http.ServletRequestDispatcher.invoke(javax.servlet.ServletRequest, javax.servlet.ServletResponse)
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     void com.evermind[Oracle9iAS (9.0.3.0.0) Containers for J2EE].server.http.ServletRequestDispatcher.forwardInternal(javax.servlet.ServletRequest, javax.servlet.http.HttpServletResponse)
          ServletRequestDispatcher.java:306
     boolean com.evermind[Oracle9iAS (9.0.3.0.0) Containers for J2EE].server.http.HttpRequestHandler.processRequest(com.evermind[Oracle9iAS (9.0.3.0.0) Containers for J2EE].server.ApplicationServerThread, com.evermind[Oracle9iAS (9.0.3.0.0) Containers for J2EE].server.http.EvermindHttpServletRequest, com.evermind[Oracle9iAS (9.0.3.0.0) Containers for J2EE].server.http.EvermindHttpServletResponse, java.io.InputStream, java.io.OutputStream, boolean)
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     void com.evermind[Oracle9iAS (9.0.3.0.0) Containers for J2EE].server.http.HttpRequestHandler.run(java.lang.Thread)
          HttpRequestHandler.java:259
     void com.evermind[Oracle9iAS (9.0.3.0.0) Containers for J2EE].server.http.HttpRequestHandler.run()
          HttpRequestHandler.java:106
     void EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run()
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     void java.lang.Thread.run()
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## Detail 0 ##
java.lang.NullPointerException
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Weird classpath issue in EAR.Some classes can access jars that others cant!

Hi,
I'm experiencing a very frustrating problem that's proving to be a bit of a show stopper for me. I would really appreciate some help...
I have an EAR deployed successfully on Sun Appserver 8 which passes the tests from the sun EAR verifier tool. The ear contains a jar file that I built which has a stateless session bean, home, remote interfaces and rmi stubs, deployment descriptors, as well as some utility classes. The EAR also contains some third-party jars such as Hibernate, Log4-j, apache-commons etc etc. The jar I built has in it's manifest file, the classpath information to reference the other jars in the ear.
The problem I am having is that one of the classes in a third-party jar (hibernate3.jar) cannot see a class in another of the third party jars (log4j-1.2.8.jar) and as a result is throwing a NoClassDefFoundError for org/apache/log4j/Layout while trying to initialise - the two jars are at the root of the EAR.
Furthermore, my utility classes can access and use Log4j classes without any problem and logging command from those classes is output successfully to the server console. However, my session bean, which is packaged in the same jar as the utility classes, fails to log anything even though it uses exactly the same logger and log configuration as the utility classses.
I have tried adding classpath information to the manifest of the EAR so that the third-party jars can pick it up but this makes no difference. Also, according to the EAR verifier tool, you are not allowed to put any classpath information in the EAR manifest.
I have also tried deploying this in weblogic but am experiencing the same problem.
If anyone can offer any advice or solutions I would greatly appreciate it.
:)

whatÂ´s type error have you?
perhaps external libraries (located in classpath) invoke opsCommon.jar and config-3.0.jar classes. then, classnotfound is normal.
and... why separate external libraries (opsCommon.jar and config-3.0.jar inside ear, and other in classpath)?

Classpath and 3rd party jar files

We have been searching for a long time and have not been able to find an answer to our question. Do you think that you could help us out?
We need to include 3rd party jar files in our application. Where in the deployment classpath directory structure can we place these. This does not seem to happen when we publish.
We also need to give our clients the ability to modify our configuration. Currently we do this with an xml file, which we place under server/config in our JBoss directory. We also need to find a home for out log4J configuration file.
Where does this type of thing exist in the SAP world?

We have had problems with 3rd party jar files also. We ended up including them in the WEB-INF/lib directory of our WAR file and packaging/deploying them everytime.
If you are looking for your project on your server, it is deployed to a directory similar to this:
/usr/sap/J01/JC00/j2ee/cluster/server0/apps
Hope this helps.
Chris

Jinit not loading webutil jar files

Hello,
Our Application Server has had webutil installed on it for quiet some time now. I am implementing a custom Banner Form that requires webutil functionality. Well the form is all set, but the webutil portion does not function correctly. I have been working with the designers of this application and they recommended I make sure that my archive_jini and archive parameters be set in the file /u01/app/oracle/product/10gASforms/10.1.2/forms/server/formsweb.cfg as follows:
archive_jini=banicons.jar,bannerui.jar,banspecial.jar,banorep.jar,frmall_jinit.jar,gwucustom.jar,frmwebutil.jar,jacob.jar
archive=banicons.jar,bannerui.jar,banspecial.jar,banorep.jar,frmall.jar,gwucustom.jar,frmwebutil.jar,jacob.jar
so I set these up as requested. When I look at my Java Console I only see the following load:
banicons.jar, bannerui.jar, banspecial.jar, banorep.jar and frmall_jinit.jar
I do not see gwucustom.jar, frmwebutil or jacob.jar load.
Is there something I am missing? Do I have to restart the Application Server?
Thank you much in advance for any guidance anyone can provide!
-Stan

I actually corrected this issue myself.
In the formsweb.cfg file I added these properties under the default section.
There is a section called jinit_pprd (My Pre-Production test server, I added these values under there and the .jar files are now loading.
-Stan

Loading separate JAR files.

Hello.
I have an application that loads functionality from separate jar files so that the application has a "hot deploy" feature. This means that the application reloads a certain functionallity if a new jar is deployed to that folder. This also means that the jars containing this functionality must be in a separate forlder than the jars for the application framework, or the system would try to load this as a functionallity as well.
In my JNLP file, I load the whole application framework at startup, but none of the functionality jars as these are loaded after the application has logged the user in and so on. I use URLClassLoader to load the funtionality classes but in these classes, I import from the allready loaded framework, and the functionalities I try to load throw an excaption that they do not find the classes in the framework.
Any ideas as to how the externally loaded jars can find classes loaded into the framework? This works perfectly well when I don't use web start, so there must be some class loading issues I am not aware of.
Thank you.
-r

OK, I am making some progress, but now I have a different problem: Some of the framework for loading was written by someone else and I would really like access to the debug information it prints without having to rewrite a lot to print it all to files. Is there any way to get access to everything that is being printed on System.out from web start. Been looking around but I can't find anything on the subject.

How to create and use library JAR files with command-line tools?

Development Tools -> General Questions:
I am trying to figure out how to put utility classes into JAR files and then compile and run applications against those JAR files using the command-line javac, jar, and java tools. I am using jdk1.7.0_17 on Debian GNU/Linux 6.0.7.
I have posted a simple example with one utility class, one console application class, and a Makefile:
http://holgerdanske.com/users/dpchrist/java/examples/jar-20130520-2134.tar.gz
Here is a console session:
2013-05-20 21:39:01 dpchrist@desktop ~/sandbox/java/jar
$ cat src/com/example/util/Hello.java
package com.example.util;
public class Hello {
    public static void hello(String arg) {
     System.out.println("hello, " + arg);
2013-05-20 21:39:12 dpchrist@desktop ~/sandbox/java/jar
$ cat src/com/example/hello/HelloConsole.java
package com.example.hello;
import static com.example.util.Hello.hello;
public class HelloConsole {
    public static void main(String [] args) {
     hello("world!");
2013-05-20 21:39:21 dpchrist@desktop ~/sandbox/java/jar
$ make
rm -f hello
find . -name '*.class' -delete
javac src/com/example/util/Hello.java
javac -cp src src/com/example/hello/HelloConsole.java
echo "java -cp src com.example.hello.HelloConsole" > hello
chmod +x hello
2013-05-20 21:39:28 dpchrist@desktop ~/sandbox/java/jar
$ ./hello
hello, world!I believe I am looking for:
1. Command-line invocation of "jar" to put the utility class bytecode file (Hello.class) into a JAR?
2. Command-line invocation of "javac" to compile the application (HelloConsole.java) against the JAR file?
3. Command-line invocation of "java" to run the application (HelloConsole.class) against the JAR file?
I already know how t compile the utility class file.
Any suggestions?
TIA,
David

I finally figured it out:
1. All name spaces must match -- identifiers, packages, file system, JAR contents, etc..
2. Tools must be invoked from specific working directories with specific option arguments, all according to the project name space.
My key discovery was that if the code says
import com.example.util.Hello;then the JAR must contain
com/example/util/Hello.classand I must invoke the compiler and interpreter with an -classpath argument that is the full path to the JAR file
-classpath ext/com/example/util.jarThe code is here:
http://holgerdanske.com/users/dpchrist/java/examples/jar-20130525-1301.tar.gz
Here is a console session that demonstrates building and running the code two ways:
1. Compiling the utility class into bytecode, compiling the application class against the utility bytecode, and running the application bytecode against the utility bytecode.
2. Putting the (previously compiled) utility bytecode into a JAR and running the application bytecode against the JAR. (Note that recompiling the application against the JAR was unnecessary.)
(If you don't know Make, understand that the working directory is reset to the initial working directory prior to each and every command issued by Make):
2013-05-25 14:02:47 dpchrist@desktop ~/sandbox/java/jar
$ cat apps/com/example/hello/Console.java
package com.example.hello;
import com.example.util.Hello;
public class Console {
    public static void main(String [] args) {
     Hello.hello("world!");
2013-05-25 14:02:55 dpchrist@desktop ~/sandbox/java/jar
$ cat libs/com/example/util/Hello.java
package com.example.util;
public class Hello {
    public static void hello(String arg) {
     System.out.println("hello, " + arg);
2013-05-25 14:03:03 dpchrist@desktop ~/sandbox/java/jar
$ make
rm -rf bin ext obj
mkdir obj
cd libs; javac -d ../obj com/example/util/Hello.java
mkdir bin
cd apps; javac -d ../bin -cp ../obj com/example/hello/Console.java
cd bin; java -cp .:../obj com.example.hello.Console
hello, world!
mkdir -p ext/com/example
cd obj; jar cvf ../ext/com/example/util.jar com/example/util/Hello.class
added manifest
adding: com/example/util/Hello.class(in = 566) (out= 357)(deflated 36%)
cd bin; java -cp .:../ext/com/example/util.jar com.example.hello.Console
hello, world!
2013-05-25 14:03:11 dpchrist@desktop ~/sandbox/java/jar
$ tree -I CVS .
|-- Makefile
|-- apps
|   `-- com
|       `-- example
|           `-- hello
|               `-- Console.java
|-- bin
|   `-- com
|       `-- example
|           `-- hello
|               `-- Console.class
|-- ext
|   `-- com
|       `-- example
|           `-- util.jar
|-- libs
|   `-- com
|       `-- example
|           `-- util
|               `-- Hello.java
`-- obj
    `-- com
        `-- example
            `-- util
                `-- Hello.class
19 directories, 6 filesHTH,
David

CLASSPATH issues on DOS/NT and loading of jar files

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