Gitlab-plugin: NullPointerException shows in gitlab-plugin 1.4.5 (fresh install)

Created on 6 Mar 2017  路  12Comments  路  Source: jenkinsci/gitlab-plugin

Issue

Context

  • Gitlab plugin version: 1.4.5
  • Gitlab version: 8.15.4
  • Jenkins version: 2.32.3 LTS (+ LDAP Credential)
  • Job type: Freestyle
  • I've already read the issue #473, but this Jenkins and the plugin was installed just a couple of days before. The plugin is installed directly, not upgrade from 1.1.x

Logs & Traces

_Please include any relevant log that could serve to better understand the source of your issue_
For Jenkins Gitlab Plugin logs, follow instruction in User Support section.
For Gitlab logs, ask an administrator to provide you the relevant Gitlab logs.

What I did:

Go to Jenkins Manage Jenkins -> Configure System -> Gitlab, click Test Connection.

The http://<JENKINS_URL>/log/gitlab-jenkins.log shows:

Mar 06, 2017 5:27:26 PM FINEST com.dabsquared.gitlabjenkins.gitlab.GitLabClientBuilder
Call GitLab:
HTTP method: HEAD
URL: http://<GITLAB-URL>/api/v3/user
Request headers: [
Accept = [application/json],
PRIVATE-TOKEN = [****FILTERED****]
]
Mar 06, 2017 5:30:26 PM FINEST com.dabsquared.gitlabjenkins.gitlab.GitLabClientBuilder
Got response from GitLab:
URL: http://<GITLAB-URL>/api/v3/user
Status: 504 Gateway Timeout
Response headers: [
Connection = [close],
Content-Length = [1140],
Content-Type = [text/html],
Date = [Mon, 06 Mar 2017 09:30:38 GMT],
Server = [squid/2.7.STABLE9],
Via = [1.0 USER001.MY.COMPANY.COM:8080 (squid/2.7.STABLE9)],
X-Cache = [MISS from USER001.MY.COMPANY.COM],
X-Squid-Error = [ERR_CONNECT_FAIL 110]
]
Response body: 
Mar 06, 2017 5:37:57 PM FINEST com.dabsquared.gitlabjenkins.gitlab.GitLabClientBuilder
Call GitLab:
HTTP method: HEAD
URL: http://<GITLAB-URL>/api/v3/user
Request headers: [
Accept = [application/json],
PRIVATE-TOKEN = [****FILTERED****]
]
Mar 06, 2017 5:40:57 PM FINEST com.dabsquared.gitlabjenkins.gitlab.GitLabClientBuilder
Got response from GitLab:
URL: http://<GITLAB-URL>/api/v3/user
Status: 504 Gateway Timeout
Response headers: [
Connection = [close],
Content-Length = [1140],
Content-Type = [text/html],
Date = [Mon, 06 Mar 2017 09:41:09 GMT],
Server = [squid/2.7.STABLE9],
Via = [1.0 USER001.MY.COMPANY.COM:8080 (squid/2.7.STABLE9)],
X-Cache = [MISS from USER001.MY.COMPANY.COM],
X-Squid-Error = [ERR_CONNECT_FAIL 110]
]
Response body:

The Configure System (http://<JENKINS_URL>/configure) shows:

gitalb-1

ERROR
A problem occurred while processing the request. Please check our bug tracker to see if a similar problem has already been reported. If it is already reported, please vote and put a comment on it to let us gauge the impact of the problem. If you think this is a new issue, please file a new issue. When you file an issue, make sure to add the entire stack trace, along with the version of Jenkins and relevant plugins. The users list might be also useful in understanding what has happened.

Stack trace

javax.servlet.ServletException: java.lang.NullPointerException
    at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:796)
    at org.kohsuke.stapler.Stapler.invoke(Stapler.java:876)
    at org.kohsuke.stapler.MetaClass$5.doDispatch(MetaClass.java:236)
    at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:58)
    at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:746)
    at org.kohsuke.stapler.Stapler.invoke(Stapler.java:876)
    at org.kohsuke.stapler.Stapler.invoke(Stapler.java:649)
    at org.kohsuke.stapler.Stapler.service(Stapler.java:238)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:812)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1669)
    at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:135)
    at org.jenkinsci.plugins.ssegateway.Endpoint$SSEListenChannelFilter.doFilter(Endpoint.java:225)
    at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:132)
    at io.jenkins.blueocean.ResourceCacheControl.doFilter(ResourceCacheControl.java:134)
    at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:132)
    at com.smartcodeltd.jenkinsci.plugin.assetbundler.filters.LessCSS.doFilter(LessCSS.java:47)
    at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:132)
    at hudson.plugins.greenballs.GreenBallFilter.doFilter(GreenBallFilter.java:59)
    at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:132)
    at jenkins.metrics.impl.MetricsFilter.doFilter(MetricsFilter.java:125)
    at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:132)
    at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:126)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
    at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:80)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
    at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)
    at hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:51)
    at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
    at jenkins.security.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:117)
    at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
    at org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)
    at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
    at org.acegisecurity.ui.rememberme.RememberMeProcessingFilter.doFilter(RememberMeProcessingFilter.java:142)
    at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
    at org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)
    at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
    at jenkins.security.BasicHeaderProcessor.doFilter(BasicHeaderProcessor.java:93)
    at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
    at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)
    at hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:67)
    at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
    at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76)
    at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:171)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
    at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:49)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
    at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:82)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
    at org.kohsuke.stapler.DiagnosticThreadNameFilter.doFilter(DiagnosticThreadNameFilter.java:30)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
    at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:553)
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
    at org.eclipse.jetty.server.Server.handle(Server.java:499)
    at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:311)
    at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
    at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:544)
    at winstone.BoundedExecutorService$1.run(BoundedExecutorService.java:77)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
    at org.jboss.resteasy.util.ReadFromStream.readFromStream(ReadFromStream.java:30)
    at org.jboss.resteasy.client.jaxrs.internal.ClientResponse.bufferEntity(ClientResponse.java:307)
    at org.jboss.resteasy.client.jaxrs.internal.proxy.extractors.DefaultEntityExtractorFactory$3.extractEntity(DefaultEntityExtractorFactory.java:48)
    at org.jboss.resteasy.client.jaxrs.internal.proxy.ClientInvoker.invoke(ClientInvoker.java:104)
    at org.jboss.resteasy.client.jaxrs.internal.proxy.ClientProxy.invoke(ClientProxy.java:64)
    at com.sun.proxy.$Proxy115.headCurrentUser(Unknown Source)
    at com.dabsquared.gitlabjenkins.connection.GitLabConnectionConfig.doTestConnection(GitLabConnectionConfig.java:130)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:335)
    at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:175)
    at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:108)
    at org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:124)
    at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:58)
    at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:746)
    ... 68 more

The /var/log/jenkins/jenkins.log shows:

Mar 06, 2017 5:40:57 PM org.eclipse.jetty.util.log.JavaUtilLog warn
WARNING: Error while serving http://<JENKINS_URL>/descriptorByName/com.dabsquared.gitlabjenkins.connection.GitLabConnectionConfig/testConnection
java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:335)
        at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:175)
        at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:108)
        at org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:124)
        at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:58)
        at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:746)
        at org.kohsuke.stapler.Stapler.invoke(Stapler.java:876)
        at org.kohsuke.stapler.MetaClass$5.doDispatch(MetaClass.java:236)
        at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:58)
        at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:746)
        at org.kohsuke.stapler.Stapler.invoke(Stapler.java:876)
        at org.kohsuke.stapler.Stapler.invoke(Stapler.java:649)
        at org.kohsuke.stapler.Stapler.service(Stapler.java:238)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
        at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:812)
        at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1669)
        at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:135)
        at org.jenkinsci.plugins.ssegateway.Endpoint$SSEListenChannelFilter.doFilter(Endpoint.java:225)
        at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:132)
        at io.jenkins.blueocean.ResourceCacheControl.doFilter(ResourceCacheControl.java:134)
        at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:132)
        at com.smartcodeltd.jenkinsci.plugin.assetbundler.filters.LessCSS.doFilter(LessCSS.java:47)
        at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:132)
        at hudson.plugins.greenballs.GreenBallFilter.doFilter(GreenBallFilter.java:59)
        at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:132)
        at jenkins.metrics.impl.MetricsFilter.doFilter(MetricsFilter.java:125)
        at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:132)
        at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:126)
        at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
        at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:80)
        at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
        at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)
        at hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:51)
        at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
        at jenkins.security.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:117)
        at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
        at org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)
        at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
        at org.acegisecurity.ui.rememberme.RememberMeProcessingFilter.doFilter(RememberMeProcessingFilter.java:142)
        at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
        at org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)
        at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
        at jenkins.security.BasicHeaderProcessor.doFilter(BasicHeaderProcessor.java:93)
        at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
        at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)
        at hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:67)
        at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
        at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76)
        at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:171)
        at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
        at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:49)
        at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
        at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:82)
        at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
        at org.kohsuke.stapler.DiagnosticThreadNameFilter.doFilter(DiagnosticThreadNameFilter.java:30)
        at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
        at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
        at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:553)
        at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
        at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
        at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
        at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
        at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
        at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
        at org.eclipse.jetty.server.Server.handle(Server.java:499)
        at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:311)
        at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
        at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:544)
        at winstone.BoundedExecutorService$1.run(BoundedExecutorService.java:77)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
        at org.jboss.resteasy.util.ReadFromStream.readFromStream(ReadFromStream.java:30)
        at org.jboss.resteasy.client.jaxrs.internal.ClientResponse.bufferEntity(ClientResponse.java:307)
        at org.jboss.resteasy.client.jaxrs.internal.proxy.extractors.DefaultEntityExtractorFactory$3.extractEntity(DefaultEntityExtractorFactory.java:48)
        at org.jboss.resteasy.client.jaxrs.internal.proxy.ClientInvoker.invoke(ClientInvoker.java:104)
        at org.jboss.resteasy.client.jaxrs.internal.proxy.ClientProxy.invoke(ClientProxy.java:64)
        at com.sun.proxy.$Proxy115.headCurrentUser(Unknown Source)
        at com.dabsquared.gitlabjenkins.connection.GitLabConnectionConfig.doTestConnection(GitLabConnectionConfig.java:130)
        ... 78 more

The Gitlab API token should be right. Cause Gitlab API URL can be visit succeed by using provivate_token:
gitlab-2

Problem description

_Describe your problem in a meaningful way_:

  • what were you doing
    The configuration.
  • what was expected
    Jenkins can connect to Gitlab successfully
  • what occurred finally
    The error shows up.
bug
Source
picture marslo
👍2

Most helpful comment

Hi @omehengan,

Well.... I 'fixed' this issue. Maybe it's not a issue actually.

Here is my situation:
Due to the company network environment, the Jenkins has been setup the proxy in Manage Jenkins -> Manage Plugins -> Advanced -> HTTP Proxy Configuration (http:///pluginManager/advanced). And somehow this proxy server has connect problem with gitlab server, even Jenkins server and Gitlab server are all in the same subnet. Looks like after the HTTP Proxy Configuration will effect the all connections.

Here is what I did:
I've added the Gitlab url in the No Proxy Host input box, and it works now....

Here the comparison:

  • Before setup the No Proxy Host
    jks-2
  • After setup the No Proxy Host
    jks
    jks-3
picture marslo on 19 Apr 2017
👍3

All 12 comments

From the http://<JENKINS_URL>/log/gitlab-jenkins.log, looks it's stuck at the LDAP certification? USER001.MY.COMPANY.COM:8080 is the our LDAP server. But, normally, we are using the LDAP server without port 8080.

marslo picture marslo on 6 Mar 2017

This looks mostly like a GitLab issue - it is returning a 504 for our requests. I don't really know why that would be. I would check the GitLab server logs and see if there is any more information there.

We should probably handle this case more gracefully though.

omehegan picture omehegan on 11 Mar 2017

Thanks @omehegan, if you need any logs or something, I can help.

marslo picture marslo on 23 Mar 2017

@omehegan I've got the same problem and no influence on the used GitLab version. Do you have any suggestions for a workaround?

Restage picture Restage on 23 Mar 2017

Hi @omehegan, I've upgraded the Gitlab to the latest version 9.0.0. However, this issue still exists.
I've check the Gitlab, and found something, maybe related with this issue. The Jenkins CI cannot be found in _Project_ -> Settings -> Integrations -> Project services. And, it's actually introduced in gitlab official website

Here the screenshot:
gitlab-jenkins

marslo picture marslo on 23 Mar 2017

@Restage, right now, I'm using the webhook function in Gitlab Project Settings. And setup Authentication Token in Jenkins Trigger builds remotely. It's kind of annoying, you have to setup webhook for each Project independently. And if there's something changed, you have to setup webhook URL again (e.g. with parameter or not).
Here screenshot in Gitlab -> _Project_ -> Settings -> Integrations:
webhook

marslo picture marslo on 23 Mar 2017

I don't think this is necessarily a bug in GitLab or in the plugin. It looks like a GitLab configuration issue. I would try using sudo gitlab-ctl tail to observe the GitLab logs when it is returning a 403 to Jenkins. That may shed some light on why it is doing that.

omehegan picture omehegan on 23 Mar 2017

Hi @omehegan, is there any workaround to fix it?
Thanks.

marslo picture marslo on 28 Mar 2017

Hi @omehengan,

Well.... I 'fixed' this issue. Maybe it's not a issue actually.

Here is my situation:
Due to the company network environment, the Jenkins has been setup the proxy in Manage Jenkins -> Manage Plugins -> Advanced -> HTTP Proxy Configuration (http:///pluginManager/advanced). And somehow this proxy server has connect problem with gitlab server, even Jenkins server and Gitlab server are all in the same subnet. Looks like after the HTTP Proxy Configuration will effect the all connections.

Here is what I did:
I've added the Gitlab url in the No Proxy Host input box, and it works now....

Here the comparison:

  • Before setup the No Proxy Host
    jks-2
  • After setup the No Proxy Host
    jks
    jks-3
marslo picture marslo on 19 Apr 2017
👍3

OK. So mostly an environment issue. On the plugin side, we should improve the behavior so we don't throw an exception when we get this error back (from the proxy server, in this case).

omehegan picture omehegan on 25 Apr 2017

Yes. I didn't also realized it was caused of proxy settings in plugin management.

marslo picture marslo on 25 Apr 2017

Maybe chose the exactly option in checkbox named "API-LEVEL" can help :smile: . @omehegan

huayaoyue6 picture huayaoyue6 on 5 Mar 2018
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