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  1. Jenkins
  2. JENKINS-52787

SEVERE: Failed to launch NIO hub java.io.IOException: Unable to establish loopback connection

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    • Icon: Bug Bug
    • Resolution: Not A Defect
    • Icon: Major Major
    • core, remoting
    • Windows 10

      While installing the Jenkins on my machine I encountered this error

      Steps to Reproduce:-

      1. Download the msi from the following url:-https://wiki.jenkins.io/display/JENKINS/Meet+Jenkins#MeetJenkins-TestDrive
      2. Install the same successfully.
      3. Check for the Jenkins service, by running services.msc
      4. Down load the jenkins.war file form the url:- https://jenkins.io/doc/pipeline/tour/getting-started/
      5. Now go to command prompt & execute the following command:-

                 java -jar jenkins.war --httpPort=8080

             Expected Result:-

      The command should be executed successfully & user should be able to open the url 

      http://localhost:8080/ successfully.

       Actual Result:-

      Error message is encountered as

      SEVERE: Failed to launch NIO hub java.io.IOException: Unable to establish loopback connection

      P.S. - I also tried the following

      Killed all the processes runniing on 8080 & then reinstalled jenkins

      Restarted the services of jenkins

      All the above options did not worked.

            jthompson Jeff Thompson
            anuragbhatia1052 Anurag BHATIA
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              Created:
              Updated:
              Resolved: