Issue details :
Take several thread dump during the benchmark, and analyze what the most threads are doing.
Weblogic Workmanager :
Correction steps :
1 – Create a custom workmanager in the weblogic domain
2 – Assign this custom workmanager to all the proxy and business service with the dispatch policy parameter
In some cases it would be preferable to create different custom workmanager to take all the workmanager benefits like min and max threads constraint and some priority parameters.