Marcel Friedmann

Implementing asynchronous stuff with the WorkManager is quite exhausting. For heavy workloads you need a sophisticated websphere configuration - the standard does not work so well for that.
The programming model is also not neat.
Since Java EE 6 you can simply add an @Asynchronous Annotation to mark an method as async. Thats a lot easier to handle. You can also combine this quite easily with Java Futures.
However you may have to break down your WorkManager-code for that.

This blog post explains briefly how to use asynchronous methods in WebSphere

liferay-home can also be configured in portal-ext.properties :-). So you can define which folder to use.
All available properties can be extracted from portal-impl.jar/portal.properties.

This blog post describes how to install liferay 6 in WebSphere.
http://www.devops-insight.com/2014/08/liferay-62-in-websphere-application.html.

Expand Resource > JMS > Queue/Topic Connection Factory > "your factory"
Under Provider endpoints enter the following triplet: <Server-Host-name>:<SIB-Endpoint-Port-of-Server/JVM>:BootstrapBasicMessaging

This is necessary when using external jms clients.

Source:
http://www.devops-insight.com/2014/08/jms-in-websphere.html

WebSphere supports to listen to queues and topics without mdbs.

Simply instanciate a TopicSubscriber (IBM class) or create a message listener.



Source:
http://www.devops-insight.com/2014/08/jms-in-websphere.html

Hi. thats a common error then a port conflict occurs.
If its a internal websphere port which is causing the trouble you can adjust the serverindex.xml of the AppServer instance directly. This is usually the easiest way :-) but it is dirty.

This post explains how to fix this error

Threads in Java EE are a no-go! Probably the connection (and hence the threads) are not properly closed (terminated).
Please use Asynchronous Methods or Work Managers in WebSphere instead of threads. Or in your case - use JDBC Connection pools correctly!

This post explains how to use asynchronous Methods in WebSphere