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Jenkins 偶尔会克隆/获取失败

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Jenkins 偶尔会克隆/获取失败

我在 Jenkins 中定期运行托管在 Gitlab 上的代码。有时，Jenkins GIT 插件无法获取远程存储库。当我再次运行它时，它就可以正常工作。

有什么想法吗？我收到了构建失败的通知，这让我抓狂。

输出：

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 [email protected]:bar/foo.git # timeout=10
Fetching upstream changes from [email protected]:bar/foo.git
 > git --version # timeout=10
using GIT_SSH to set credentials 
 > git fetch --tags --progress [email protected]:bar/foo.git +refs/heads/*:refs/remotes/origin/*
ERROR: Error fetching remote repo 'origin'
hudson.plugins.git.GitException: Failed to fetch from [email protected]: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 [email protected]: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

答案1

我在这里找到了解决方案：https://secure.phabricator.com/T11469

就我而言，该问题是由于 sshd 中的“MaxStartups”指令引起的，该指令指定了与 SSH 守护进程的最大并发未经身份验证连接数（有关man sshd_config详细信息，请参阅）。

当许多 Jenkins 作业同时运行时，这可能会导致许多并发的未经身份验证的连接连接到 SSH 守护程序，在这种情况下，sshd 将开始丢弃连接。您可以设置“MaxStartups”指令来/etc/ssh/sshd_config增加并发未经身份验证的连接数，当达到该数目时，sshds 将开始丢弃连接（默认为 10）。

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