Weblogic Class-Path Dependencies EAR

dependenciesweblogic

I am deploying an EAR in a WebLogic node with many jars defined in the bootstrap (startWeblogicServer.bat) class-path. The problem is that my ear and the bootstrap contain different versions of the same jars, not only that but certain jars contain extracted third party libraries which also differ in version from the WebLogic bootstrap jars causing all kinds of classpath errors.

I know you can set preferred jars in the EAR application xml but, this can be very tedious to resolve with regards to jars which include extracted third party libraries in terms of understanding all the dependencies..

Is there a correct approach that i need to be taking here? Am i thinking about this in the wrong way? Any help would be greatly appreciated!

So far prefer-web-inf-classes has been recommended but wont work because i'm not deploying a WAR, also prefer-application-packages is what we are currently using but still has the issue described above… Anymore advice out there?? Thanks!

Best Answer

I don't know if it can help you, but you can define a classpath to be resolved before the java virtual machine will load the weblogic classes (and before the application deployment), directly in the java command line.

From the java documentaion:

-Xbootclasspath/p:path Specify a colon-separated path of directories, JAR archives, and ZIP archives to prepend in front of the default bootstrap class path. Note: Applications that use this option for the purpose of overriding a class in rt.jar should not be deployed as doing so would contravene the Java 2 Runtime Environment binary code license.

Normally you should not use different version of the same library inside the same JVM... If you have this need you can create different WL servers and install different libs

Related Solutions

Weblogic WLST classpath

This is because you are executing this script. This means that a new shell process is being created, and the variables defined or modified have a scope only in that subshell. The parent process does not inherit child's environment.

Whenever you want to load an variables defined in a given file, you have to source it:

$ source file

$ . file

How to Get apt-get to Ignore Some Dependencies – Ubuntu Debian

Simple and easy solution: just specify the unwanted packages with an extra - after each of them.

Example without the - switch:

root@debian:~# apt-get install bsd-mailx 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following extra packages will be installed:
  exim4-base exim4-config exim4-daemon-light liblockfile-bin liblockfile1
[...]

Example using the switch to avoid installing exim4-base. Notice the - at the end:

root@debian:~# apt-get install bsd-mailx exim4-base-
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package 'exim4-base' is not installed, so not removed
The following extra packages will be installed:
  liblockfile-bin liblockfile1 ssmtp
[...]

As you can see, apt-get does not try anymore to install the exim4-base package, and it does not try to install its various dependencies (exim4-config etc).

And if you were wrong and needed that exim4-base dependency after all, you can just apt-get install it later!

Best Answer

Related Solutions

Weblogic WLST classpath

How to Get apt-get to Ignore Some Dependencies – Ubuntu Debian

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