问题
I have already configured the java enviroment and installtion path
回答1:
This is a duplicate question from Server Fault: Answer Here
Java Web Start utilizes TCP so it has to be enabled and configured in Jenkins...
- Login to Jenkins as admin
- Manage Jenkins > Configure Global Security > TCP port for JNLP agents
Do yourself a favor and pick a static port assignment...
回答2:
As of Jenkins version 2.176.3, there is option enabled when "Launch agent by connecting it to the master" which is same as "launch agent via java web start" once you enable the "Manage Jenkins => Configure Global Security => Agents => TCP port for inbound agents" as mentioned above. e.g. Fixed: 50000
回答3:
Make sure that you've enabled a JNLP port in Manager Jenkins -> Configure Global Security. If no JNLP port is specified, then the JNLP slave option will not appear.
来源：https://stackoverflow.com/questions/40340097/there-is-no-launch-agent-via-java-web-start-option-in-my-jenkins-when-i-adding