1、更新插件替換為國內(nèi)鏡像插件源

替換原因：進入 Manage Jenkins -》 Manage Plugin，發(fā)現(xiàn)Updates tab頁沒數(shù)據(jù)，報There were errors checking the update sites: SocketTimeoutException: connect timed out錯誤（連接更新插件源超時）

問題分析：首先切換到Advanced tab頁，Advanced tab頁最下面有 Update Site 設(shè)置，看下當(dāng)前Jenkins服務(wù)配置的更新插件源為：https://updates.jenkins.io/update-center.json，然后ssh到Jenkins服務(wù)所在服務(wù)器，驗證此服務(wù)器是否能連通當(dāng)前配置的更新插件源，經(jīng)測試網(wǎng)絡(luò)不通。

解決方案：將更新插件源替換為替換為服務(wù)器節(jié)點能夠連通的國內(nèi)插件源：

https://mirrors.tuna.tsinghua.edu.cn/jenkins/updates/update-center.json

或者：

http://mirror.xmission.com/jenkins/updates/update-center.json

修改完后可以點擊Submit按鈕，然后點擊Check now檢查下，如果能重啟Jenkins服務(wù)的話點擊Submit按鈕后可以直接重啟下Jenkins服務(wù)。

2、maven流水線構(gòu)建報以下錯誤

+ mvn clean deploy
Error: missing `server' JVM at `/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.232.b09-0.el7_7.i386/jre/lib/i386/server/libjvm.so'.
Please install or use the JRE or JDK that contains these missing components.
script returned exit code 4

據(jù)項目組開發(fā)人員反饋，上午流水線任務(wù)構(gòu)建還正常，下午流水線構(gòu)建就報上面錯誤了，期間并沒有修改過流水線配置、源碼里面并沒調(diào)整過JDK版本相關(guān)內(nèi)容。

解決思路：經(jīng)排查Jenkins Pod運行正常，maven打包容器也能拉取源碼，只不過執(zhí)行mvn命令時報錯，所以基本可以排除Jenkins組件問題，于是網(wǎng)上搜索類似問題，找到類似問題文章：

adcfgclone.pl Error: missing `server' JVM at libjvm.so。

于是ssh到流水線打包節(jié)點，經(jīng)排查操作系統(tǒng)正好是centos7.x，docker數(shù)據(jù)盤目錄掛載的數(shù)據(jù)盤文件系統(tǒng)格式正是XFS，切掛載點超過了1T。

解決方案：修改容器云打包節(jié)點到docker數(shù)據(jù)盤<1T的節(jié)點上，至此問題解決。

3、解決Jenkins流水線任務(wù)拉取代碼報git config File exists錯誤

錯誤信息：

returned status code 255:
stdout:
stderr: error: could not lock config file .git/config: File exists
 
    at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandIn(CliGitAPIImpl.java:2450)
    at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandIn(CliGitAPIImpl.java:2380)
    at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandIn(CliGitAPIImpl.java:2376)
    at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommand(CliGitAPIImpl.java:1923)
    at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommand(CliGitAPIImpl.java:1935)
    at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.setRemoteUrl(CliGitAPIImpl.java:1549)
    at hudson.plugins.git.GitAPI.setRemoteUrl(GitAPI.java:161)
    at jenkins.plugins.git.AbstractGitSCMSource.doRetrieve(AbstractGitSCMSource.java:357)
    at jenkins.plugins.git.AbstractGitSCMSource.doRetrieve(AbstractGitSCMSource.java:330)
    at jenkins.plugins.git.AbstractGitSCMSource.retrieve(AbstractGitSCMSource.java:396)
    at jenkins.scm.api.SCMSource.fetch(SCMSource.java:582)
    at org.jenkinsci.plugins.workflow.multibranch.SCMBinder.create(SCMBinder.java:100)
    at org.jenkinsci.plugins.workflow.job.WorkflowRun.run(WorkflowRun.java:310)
    at hudson.model.ResourceController.execute(ResourceController.java:99)
    at hudson.model.Executor.run(Executor.java:432)
Finished: FAILURE

解決方案：

到Jenkins數(shù)據(jù)目錄查找，可以發(fā)現(xiàn)在Jenkins安裝目錄下有個caches目錄

/var/jenkins_home/caches/git-762b1469bb9de7658adbaec8d8b12877/.git/config
......
/var/jenkins_home/caches/git-6dff59f087b2f03588f3905a47012c3c/.git/config
/var/jenkins_home/caches/git-259c3ec0c808380e583d66552ba73d06/.git/config
/var/jenkins_home/caches/git-08f22672d5e50dba23f07dcd52f3100d/.git/config
/var/jenkins_home/caches/git-ee60fb5e6f1859e7ee4717f127258a34/.git/config
/var/jenkins_home/.config/jgit/config

在某個git-xxx目錄里面有.git/config文件和.git/config.lock文件，刪除config.lock文件即可

find / -name "config.lock" -type f
rm xxx.xxx/config.lock

4、maven流水線構(gòu)建報unable to allocate file descriptoe table - out of ....錯誤

錯誤信息：

解決方案：

1）先檢查Jenkins打包節(jié)點文件句柄數(shù)配置

ulimit-n

如果值過小，通過以下命令進行配置

ci節(jié)點配置limit：
echo "* soft nofile 65535" >>/etc/security/limits.conf
echo "* hard nofile 65535" >>/etc/security/limits.conf
ulimit -n 65535

2）檢查Jenkins打包節(jié)點docker服務(wù)句柄數(shù)配置

docker服務(wù)配置文件配置limit

/usr/lib/systemd/system/docker.service
--default-ulimit nofile=65535:65535

重啟docker服務(wù)

systemctl daemon-reload
systemctl restart docker

鏈接：https://www.cnblogs.com/zhangmingcheng/p/16206435.html