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JackRabbit setup on WAS for one of our REST application

We are trying to setup JackRabbit Oak on one of our Linux machine with IBM WAS application server and facing some issues starting the sever on WAS.
The Apache JackRabbit is a content repository which is a hierarchical content store with support for structured and unstructured content, full text search, versioning, transactions, observation, and more. We are using it for storing digital assets in structured form (specifically, as a tree) as per our requirement.
We have a REST application and another application DAM (Digital Asset Management) which handles creation of repository, providing connection with the repo whenever requested (Singleton), creating nodes, etc. on the repository. In our local development setup we have exported this DAM as a JAR, say dam.jar and have put this in REST application’s class path. We have JackRabbit Oak’s JAR (oak-run-1.4.11.jar), which we have put in class path of DAM application.
While doing a similar setup on Linux machine on WAS application server, we are using the same dam.jar which is created by exporting the project as a JAR in eclipse on Windows machine. We put this in REST application’s class path on WAS by configuring this in the server on which REST app is deployed.
While debugging we found that application is able to access classes from dam.jar, but when DAM’s class tries to call JackRabbit’s classes it fails throwing java.lang.NoClassDefFoundError. We tried putting JackRabbit’s JAR (oak-run-1.4.11.jar) in the class path on WAS by configuring this for REST app’s server, but then server fails to start.
Attached is the log file: /opt/IBM/WebSphere/AppServer/profiles/AppSrv01/servers/RESTAPP/configuration/1489493294429.log
There is nothing much inside server logs from /opt/IBM/WebSphere/AppServer/profiles/AppSrv01/logs/RESTAPP (RESTAPP is the server name for our REST application), below is the snippet:
[3/14/17 17:38:04:872 IST] 00000001 ModelMgr I WSVR0801I: Initializing all server configuration models
[3/14/17 17:38:08:564 IST] 00000001 WorkSpaceMana A WKSP0500I: Workspace configuration consistency check is disabled.
[3/14/17 17:38:08:834 IST] 00000001 AdminTool A ADMU3200I: Server launched. Waiting for initialization status.
[3/14/17 17:38:18:241 IST] 00000001 AdminTool A ADMU3011E: Server launched but failed initialization. Server logs, startServer.log, and other log files under /opt/IBM/WebSphere/AppServer/profiles/AppSrv01/logs/RESTAPP should contain failure information.
We suspect dam.jar here, as this has been created from our eclipse workspace by exporting it as a JAR file and this might need some extra information to have this JackRabbit Oak libraries included in that.
We are putting classpath entries in Application servers > RESTAPP > Process definition > Java Virtual Machine of WAS.
Thanks

I would try creating a "Shared library" in Websphere and putting your JackRabbit dependency jars in there:
Environment -> Shared libraries -> New...
Set then name "Jackrabbit", and then in the Classpath box add the paths to your jars.
Then in your REST application (Applications -> Application Types -> WebSphere enterprise applications -> [your application name])
Click "Shared library references" under "References"
Select the application and click "Reference shared libraries"
Select the Jackrabbit shared library and click the right arrow to reference that shared library from the application.
Classloading in WebSphere is very complicated -- see chapter 22 of the WebSphere Application Server V8.5 Administration and Configuration Guide for the full description. Trying to add classpath entries at the JVM definition level definitely won't work.

To piggyback on Andrew's answer above, the real key is to make sure that both dam.jar and oak-run-1.4.11.jar are within the same class loader, and that they are NOT in a server-level class loader - putting custom code in the server JVM class path makes it visible to the server runtime and can actually override server classes (which is probably why your server init failed after doing that).
The very easiest answer, assuming this is a simple web application, is to put both jars in the WEB-INF directory of your WAR module. Both will be loaded by the web app class loader, and they'll be able to see each other. If there's some reason you don't want them in the application itself, then Andrew's shared library suggestion would have the same practical effect.

How to create my own logging configuration for an Openfire Plugin

I have the following setup
Version: Openfire 4.0.2
Server Directory: /opt/openfire
Running on a Centos (6) machine.
I have a plugin and I run a lot of debug code when developing. I will get an instance of a Logger using:
private static final Logger Log = LoggerFactory.getLogger(Submitter.class)
but the problem is that when I look at the logs (DEBUG level), I get EVERYTHING that has DEBUG (for example the httpd Apache libraries). I know that in JBOSS (and other systems) I can make a config that allows me to put Log Ouput of just my plugin to a specific location (e.g. a separate file).
Does anyone have any idea how to do this or if this is possible in Openfire?
Many thanks

In Openfire installation, under lib directory, there's a config file named
log4j.xml
just modify this and override default one.
If you need a log4j tutorial, check out at: https://www.mkyong.com/logging/log4j-xml-example
In you case you can:
redirect your own classes in another custom file
redirect all debug in another file and keep your custom class in
default debug log so it will be viable by Openfire webinterface

Java MVC project in Spring Tool Suite additional files

I'm learning to make Java MVC project using Spring Tool Suite tool.
The path to make new project is:
File->New->SpringLegacyProject->Spring MVC Project.
My question is: which directory I have to use to add additional not-Spring files and where and what do I have to type for Spring files to see them?
For example:
css files - where to put and how to make jsp views see them, will 'link rel="" 'tag be enough?
properties files used to specify database connection or to specify messages for ReloadableResourceBundleMessageSource. In this case, do I have to create bean for this class in root-context.xml?
Thanks.

You should probably use Spring Boot (i.e. use File->New->Spring Starter Project and select Web as a starter. Place your web resources under src/main/resources/static folder. They are picked up automatically from that folder.
You should try an example project: File -> New -> Import Spring Getting Started Content and then pick "Serving Web Content" from the list.
Try some DB getting started content example to get the answer for the second part of your question.

Switch java spring maven project from linux to windows

I am new to spring development so i am stuck here. Is there any configuration while switching spring + maven project from linux to windows. I am running on tomcat server 7. The project is initially developed in linux. I have moved all the file from linux to wondows. While running on server, i get error The requested resource (/myproject/login/) is not available. Do i need to make any changes or add add in configuation.
Thanks in advance.

I think you have missed something.
Try this.but i'am not sure this is working or not.
Tomcat, by default invoker servlet disabled (commented out in the web.xml file). You have to create a 'servlet' and a 'servlet-mapping' entry in your web.xml.
Once you do, you can get rid of the "servlet/" part of your url.
Check out the following URL for more information regarding the invoker servlet:
http://faq.javaranch.com/view?InvokerServlet

using JDBC within dynamic web application

I have a dynamic web application using struts2 that works perfectly.
I have a JDBC application that works perfectly (all it does is print a table out in the console).
After I put the two together all that was left was to add authentication to the run configuration and I'd be done...
I've already put the sqljdbc_auth.dll to the WEB-INF/lib
I've tried to add this line to Tomcat v7.0 Server at localhost
-Djava.library.path="C:\Program Files (x86)\jdbc\sqljdbc_4.0\enu\auth\x86"
but it doesn't do anything
This driver is not configured for integrated authentication.
ClientConnectionId:6495...
It's the line that got my JDBC application working just fine.
Would there be some syntax error I'm missing or another method for me to pass an argument that I'm not aware of?

It looks like you are using the Microsoft SQL Server Driver which is pure java (type 4) so you dont need to mess with java.library.path. Set the Classpath as described here
Alternatively include the jdbc driver in WEB-INF/lib within your WAR file.