Hi,
I am running code hosted on Gitlab on regular basis in Jenkins. From time to time, Jenkins GIT plugin failes to fetch the remote repository. It works fine when I just run it again.
Any idea? I have notifications for failed builds and it drives me crazy 
Output:
Started by timer
[EnvInject] - Loading node environment variables.
Building remotely on vps6 (worker) in workspace /home/worker/workspace/foo
> git rev-parse --is-inside-work-tree # timeout=10
Fetching changes from the remote Git repository
> git config remote.origin.url git@gitlab.com:bar/foo.git # timeout=10
Fetching upstream changes from git@gitlab.com:bar/foo.git
> git --version # timeout=10
using GIT_SSH to set credentials
> git fetch --tags --progress git@gitlab.com:bar/foo.git +refs/heads/*:refs/remotes/origin/*
ERROR: Error fetching remote repo 'origin'
hudson.plugins.git.GitException: Failed to fetch from git@gitlab.com:bar/foo.git
at hudson.plugins.git.GitSCM.fetchFrom(GitSCM.java:888)
at hudson.plugins.git.GitSCM.retrieveChanges(GitSCM.java:1155)
at hudson.plugins.git.GitSCM.checkout(GitSCM.java:1186)
at hudson.scm.SCM.checkout(SCM.java:504)
at hudson.model.AbstractProject.checkout(AbstractProject.java:1208)
at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:574)
at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:86)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:499)
at hudson.model.Run.execute(Run.java:1727)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:97)
at hudson.model.Executor.run(Executor.java:429)
Caused by: hudson.plugins.git.GitException: Command "git fetch --tags --progress git@gitlab.com:bar/foo.git +refs/heads/*:refs/remotes/origin/*" returned status code 128:
stdout:
stderr: ssh_exchange_identification: Connection closed by remote host
fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandIn(CliGitAPIImpl.java:2002)
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandWithCredentials(CliGitAPIImpl.java:1721)
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.access$300(CliGitAPIImpl.java:72)
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl$1.execute(CliGitAPIImpl.java:405)
at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler$1.call(RemoteGitImpl.java:153)
at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler$1.call(RemoteGitImpl.java:146)
at hudson.remoting.UserRequest.perform(UserRequest.java:210)
at hudson.remoting.UserRequest.perform(UserRequest.java:53)
at hudson.remoting.Request$2.run(Request.java:364)
at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Suppressed: hudson.remoting.Channel$CallSiteStackTrace: Remote call to vps6
at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1737)
at hudson.remoting.UserResponse.retrieve(UserRequest.java:313)
at hudson.remoting.Channel.call(Channel.java:952)
at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler.execute(RemoteGitImpl.java:146)
at sun.reflect.GeneratedMethodAccessor109.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler.invoke(RemoteGitImpl.java:132)
at com.sun.proxy.$Proxy52.execute(Unknown Source)
at hudson.plugins.git.GitSCM.fetchFrom(GitSCM.java:886)
at hudson.plugins.git.GitSCM.retrieveChanges(GitSCM.java:1155)
at hudson.plugins.git.GitSCM.checkout(GitSCM.java:1186)
at hudson.scm.SCM.checkout(SCM.java:504)
at hudson.model.AbstractProject.checkout(AbstractProject.java:1208)
at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:574)
at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:86)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:499)
at hudson.model.Run.execute(Run.java:1727)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:97)
at hudson.model.Executor.run(Executor.java:429)
ERROR: Error fetching remote repo 'origin'
Finished: FAILURE