Jenkins is fully up and running but not accessible on browser

[Tengfei Chang]

Hello Jenkins community,

I am a user of Jenkins, who install jenkins through 'sudo apt-get install jenkins' on a Ubuntu Machine.

Recently, I updated the jenkins and found the jenkins never be able to show up on browser.

By checking the last 30 lines of log from "/vars/log/jenkins/jenkins.log": 

Jun 03, 2019 4:54:52 PM org.springframework.context.support.AbstractApplicationContext prepareRefresh

INFO: Refreshing org.springframework.web.context.support.StaticWebApplicationContext@459151c5: display name [Root WebApplicationContext]; startup date [Mon Jun 03 16:54:52 CEST 2019]; root of context hierarchy

Jun 03, 2019 4:54:52 PM org.springframework.context.support.AbstractApplicationContext obtainFreshBeanFactory

INFO: Bean factory for application context [org.springframework.web.context.support.StaticWebApplicationContext@459151c5]: org.springframework.beans.factory.support.DefaultListableBeanFactory@37d954b6

Jun 03, 2019 4:54:52 PM org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons

INFO: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@37d954b6: defining beans [filter,legacy]; root of factory hierarchy

Jun 03, 2019 4:54:52 PM jenkins.InitReactorRunner$1 onAttained

INFO: Completed initialization

Jun 03, 2019 4:54:52 PM hudson.plugins.scm_sync_configuration.SCMManipulator scmConfigurationSettledUp

INFO: Creating scmRepository connection data ..

Jun 03, 2019 4:54:53 PM hudson.plugins.scm_sync_configuration.scms.SCM getConfiguredRepository

INFO: Creating SCM repository object for url : scm:git:g...@github.com:realms-team/builder_openwsn_org-config.git

[INFO] Executing: /bin/sh -c cd '/tmp' && 'git' 'ls-remote' 'g...@github.com:realms-team/builder_openwsn_org-config.git'

[INFO] Working directory: /tmp

Jun 03, 2019 4:54:53 PM hudson.plugins.scm_sync_configuration.ScmSyncConfigurationBusiness initializeRepository

INFO: Initializing SCM repository for scm-sync-configuration plugin ...

[INFO] Executing: /bin/sh -c cd '/var/lib/jenkins/scm-sync-configuration/checkoutConfiguration' && 'git' 'pull' 'g...@github.com:realms-team/builder_openwsn_org-config.git' 'master'

[INFO] Working directory: /var/lib/jenkins/scm-sync-configuration/checkoutConfiguration

[INFO] Executing: /bin/sh -c cd '/var/lib/jenkins/scm-sync-configuration/checkoutConfiguration' && 'git' 'checkout'

[INFO] Working directory: /var/lib/jenkins/scm-sync-configuration/checkoutConfiguration

[INFO] Executing: /bin/sh -c cd '/var/lib/jenkins/scm-sync-configuration/checkoutConfiguration' && 'git' 'ls-files'

[INFO] Working directory: /var/lib/jenkins/scm-sync-configuration/checkoutConfiguration

Jun 03, 2019 4:54:55 PM hudson.plugins.scm_sync_configuration.ScmSyncConfigurationBusiness initializeRepository

INFO: SCM repository initialization done.

Jun 03, 2019 4:54:55 PM hudson.WebAppMain$3 run

INFO: Jenkins is fully up and running

Jun 03, 2019 4:55:01 PM org.jenkinsci.remoting.util.AnonymousClassWarnings warn

WARNING: Attempt to (de-)serialize anonymous class org.jenkinsci.plugins.pipeline.modeldefinition.ast.ModelASTValue$1 in file:/var/lib/jenkins/plugins/pipeline-model-api/WEB-INF/lib/pipeline-model-api.jar; see:https://jenkins.io/redirect/serialization-of-anonymous-classes/

Jun 03, 2019 4:55:03 PM hudson.TcpSlaveAgentListener$ConnectionHandler run

INFO: Accepted JNLP4-connect connection #1 from /128.93.102.86:50505

You can see the Jenkins is fully up and running, but when I visit localhost:8080, it shows

"

This site can’t be reached

"

I did see the waiting pages and it asks waiting jenkins is ready to reload the page. But it never happens. If I reload manually, I got the "This site can't be reached"info on the page.

Any idea about this issue? Thanks a lot!

Tengfei

--

Chang Tengfei,

Postdoctoral Research Engineer, Inria