CXF workqueues are used for queuing incoming work requests using a thread pool.
The etc/org.apache.cxf.workqueues.cfg configuration file is used for workqueue configuration (without this file, the configuration would need to be done for each individual bundle using CXF services). This process can significantly optimize the performance of HTTP / CXF Service request handling in the Talend Runtime Container.
This mechanism allows you to configure global workqueues for use by all bundles that are created, and normally services would share a thread pool. However an individual service can override this via local configuration if they have specific requirements.