I use the plugin to install a jar on a linux server.
The rundeck task is started correctly, however jenkins get the following error:
"ERROR: Step ?Rundeck? failed: Error while talking to Rundeck's API at http://server:4440/ : Failed to read Rundeck response"
I have checked all the logs, them do not show permissions error and I could not detect the problem.
What do I need to configure for jenkins to take the correct response?

the localhost_access of tomcat jenkins print

"[07/Jul/2017:15:12:04 -0500] "POST /jenkins/plugin/rundeck/webhook/ HTTP/1.1" 200 -"

Jenkins log print:

"09:06:45 Started by user DevOps
09:06:45 Building in workspace /libre/devops/.jenkins/workspace/QA_sw_install
09:07:14 Notifying Rundeck...
09:07:14 Looking for jobId : 859094c7-4d20-4c51-ad96-403fc8a7f05d
09:07:35 Error while talking to Rundeck's API at http://belfast.local:4440/ : Failed to read Rundeck response
09:07:35 ERROR: Step ?Rundeck? failed: Error while talking to Rundeck's API at http://belfast.local:4440/ : Failed to read Rundeck response
09:07:35 Finished: SUCCESS"