Technical references : Administration : Restarting the server
Restarting the server
Restarting the application server
Restarting the application server is nothing more than restarting the service. Under normal operations no other actions are needed. But it can happen the server gets polluted due to network hiccups or other interruptions, which require a complete clean startup:
1. Stop the service.
2. Remove the following folders located in ...\Server\wildfly-* \standalone\
data\bundlecache
data\tx-object-store
tmp
data\tmp
3. Start the server.
* 
Refrain from deleting any folders within the data directory, as they contain unprocessed data. Deleting these folders could lead to significant data loss. Only consider cleaning up these folders if the application server fails to start, and all other troubleshooting measures have been exhausted. Removing these folders will result in the permanent loss of unprocessed work.