近期要在Jenkins中新增jacoco，对老旧Jenkins进行升级，碰到的一些问题汇总。
jenkins配置说明
- 主目录，可在Configure System中查看，一般在：
/var/lib/jenkins - war包目录，可在linux启动程序充查看，一般在：
/usr/lib/jenkins - 系统服务脚本，我司在centos中安装运行，在
/etc/rc.d/init.d/jenkins - jenkins日志，一般配置在
/var/log/jenkins
服务脚本
bash
#!/bin/sh
#
# RedHat system statup script for Jenkins
# Based on SUSE system statup script for Jenkins
# Copyright (C) 2007 Pascal Bleser
#
# This library is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or (at
# your option) any later version.
#
# This library is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307,
# USA.
#
###############################################################################
#
# chkconfig: 35 99 01
# description: Jenkins Automation Server
#
###############################################################################
### BEGIN INIT INFO
# Provides: jenkins
# Required-Start: $local_fs $remote_fs $network $time $named
# Should-Start: $time sendmail
# Required-Stop: $local_fs $remote_fs $network $time $named
# Should-Stop: $time sendmail
# Default-Start: 3 5
# Default-Stop: 0 1 2 6
# Short-Description: Jenkins Automation Server
# Description: Jenkins Automation Server
### END INIT INFO
# Check for missing binaries (stale symlinks should not happen)
JENKINS_WAR="/usr/lib/jenkins/jenkins.war"
test -r "$JENKINS_WAR" || { echo "$JENKINS_WAR not installed";
if [ "$1" = "stop" ]; then exit 0;
else exit 5; fi; }
# Check for existence of needed config file and read it
JENKINS_CONFIG=/etc/sysconfig/jenkins
test -e "$JENKINS_CONFIG" || { echo "$JENKINS_CONFIG not existing";
if [ "$1" = "stop" ]; then exit 0;
else exit 6; fi; }
test -r "$JENKINS_CONFIG" || { echo "$JENKINS_CONFIG not readable. Perhaps you forgot 'sudo'?";
if [ "$1" = "stop" ]; then exit 0;
else exit 6; fi; }
JENKINS_PID_FILE="/var/run/jenkins.pid"
JENKINS_LOCKFILE="/var/lock/subsys/jenkins"
# Source function library.
. /etc/init.d/functions
# Read config
[ -f "$JENKINS_CONFIG" ] && . "$JENKINS_CONFIG"
# Set up environment accordingly to the configuration settings
[ -n "$JENKINS_HOME" ] || { echo "JENKINS_HOME not configured in $JENKINS_CONFIG";
if [ "$1" = "stop" ]; then exit 0;
else exit 6; fi; }
[ -d "$JENKINS_HOME" ] || { echo "JENKINS_HOME directory does not exist: $JENKINS_HOME";
if [ "$1" = "stop" ]; then exit 0;
else exit 1; fi; }
# Search usable Java as /usr/bin/java might not point to minimal version required by Jenkins.
# see http://www.nabble.com/guinea-pigs-wanted-----Hudson-RPM-for-RedHat-Linux-td25673707.html
candidates="
/etc/alternatives/java
/usr/lib/jvm/java-1.8.0/bin/java
/usr/lib/jvm/jre-1.8.0/bin/java
/usr/lib/jvm/java-1.7.0/bin/java
/usr/lib/jvm/jre-1.7.0/bin/java
/usr/lib/jvm/java-11.0/bin/java
/usr/lib/jvm/jre-11.0/bin/java
/usr/lib/jvm/java-11-openjdk-amd64
/usr/bin/java
"
for candidate in $candidates
do
[ -x "$JENKINS_JAVA_CMD" ] && break
JENKINS_JAVA_CMD="$candidate"
done
JAVA_CMD="$JENKINS_JAVA_CMD $JENKINS_JAVA_OPTIONS -DJENKINS_HOME=$JENKINS_HOME -jar $JENKINS_WAR"
PARAMS="--logfile=/var/log/jenkins/jenkins.log --webroot=/var/cache/jenkins/war --daemon"
[ -n "$JENKINS_PORT" ] && PARAMS="$PARAMS --httpPort=$JENKINS_PORT"
[ -n "$JENKINS_LISTEN_ADDRESS" ] && PARAMS="$PARAMS --httpListenAddress=$JENKINS_LISTEN_ADDRESS"
[ -n "$JENKINS_HTTPS_PORT" ] && PARAMS="$PARAMS --httpsPort=$JENKINS_HTTPS_PORT"
[ -n "$JENKINS_HTTPS_KEYSTORE" ] && PARAMS="$PARAMS --httpsKeyStore=$JENKINS_HTTPS_KEYSTORE"
[ -n "$JENKINS_HTTPS_KEYSTORE_PASSWORD" ] && PARAMS="$PARAMS --httpsKeyStorePassword='$JENKINS_HTTPS_KEYSTORE_PASSWORD'"
[ -n "$JENKINS_HTTPS_LISTEN_ADDRESS" ] && PARAMS="$PARAMS --httpsListenAddress=$JENKINS_HTTPS_LISTEN_ADDRESS"
[ -n "$JENKINS_DEBUG_LEVEL" ] && PARAMS="$PARAMS --debug=$JENKINS_DEBUG_LEVEL"
[ -n "$JENKINS_HANDLER_STARTUP" ] && PARAMS="$PARAMS --handlerCountStartup=$JENKINS_HANDLER_STARTUP"
[ -n "$JENKINS_HANDLER_MAX" ] && PARAMS="$PARAMS --handlerCountMax=$JENKINS_HANDLER_MAX"
[ -n "$JENKINS_HANDLER_IDLE" ] && PARAMS="$PARAMS --handlerCountMaxIdle=$JENKINS_HANDLER_IDLE"
[ -n "$JENKINS_ARGS" ] && PARAMS="$PARAMS $JENKINS_ARGS"
if [ "$JENKINS_ENABLE_ACCESS_LOG" = "yes" ]; then
PARAMS="$PARAMS --accessLoggerClassName=winstone.accesslog.SimpleAccessLogger --simpleAccessLogger.format=combined --simpleAccessLogger.file=/var/log/jenkins/access_log"
fi
RETVAL=0
case "$1" in
start)
echo -n "Starting Jenkins "
daemon --user "$JENKINS_USER" --pidfile "$JENKINS_PID_FILE" $JAVA_CMD $PARAMS > /dev/null
RETVAL=$?
if [ $RETVAL = 0 ]; then
success
echo > "$JENKINS_PID_FILE" # just in case we fail to find it
MY_SESSION_ID=`/bin/ps h -o sess -p $$`
# get PID
/bin/ps hww -u "$JENKINS_USER" -o sess,ppid,pid,cmd | \
while read sess ppid pid cmd; do
[ "$ppid" = 1 ] || continue
# this test doesn't work because Jenkins sets a new Session ID
# [ "$sess" = "$MY_SESSION_ID" ] || continue
echo "$cmd" | grep $JENKINS_WAR > /dev/null
[ $? = 0 ] || continue
# found a PID
echo $pid > "$JENKINS_PID_FILE"
done
touch $JENKINS_LOCKFILE
else
failure
fi
echo
;;
stop)
echo -n "Shutting down Jenkins "
killproc jenkins
rm -f $JENKINS_LOCKFILE
RETVAL=$?
echo
;;
try-restart|condrestart)
if test "$1" = "condrestart"; then
echo "${attn} Use try-restart ${done}(LSB)${attn} rather than condrestart ${warn}(RH)${norm}"
fi
$0 status
if test $? = 0; then
$0 restart
else
: # Not running is not a failure.
fi
;;
restart)
$0 stop
$0 start
;;
force-reload)
echo -n "Reload service Jenkins "
$0 try-restart
;;
reload)
$0 restart
;;
status)
status jenkins
RETVAL=$?
;;
probe)
## Optional: Probe for the necessity of a reload, print out the
## argument to this init script which is required for a reload.
## Note: probe is not (yet) part of LSB (as of 1.9)
test "$JENKINS_CONFIG" -nt "$JENKINS_PID_FILE" && echo reload
;;
*)
echo "Usage: $0 {start|stop|status|try-restart|restart|force-reload|reload|probe}"
exit 1
;;
esac
exit $RETVAL升级说明
可根据服务脚本查看jenkins的一些信息，由于进行升级版本跨度比较大，最新版本不再支持JDK8，需要对JDK进行升级。
- 升级JDK：
yum install java-11-openjdk-devel - 停止jenkins运行：
systemctl stop jenkins - 下载最新LTS版本，War Packages，下载到服务器, 备份
/usr/lib/jenkins/jenkins.war，并复制新版本到此处。(机场下更快) - 可由启动脚本看到，会检测java，默认第一个为
/etc/alternatives/java，所以升级JDK后需要配置升级后的JDK java：ln -snf /usr/lib/jvm/java-11-openjdk-11.0.19.0.7-1.el7_9.x86_64/bin/java /etc/alternatives/java - 重启jenkins即可：
systemctl start jenkins
升级后问题汇总
启动卡死，异常报错
异常如：
SEVERE jenkins.model.Jenkins#save: An attempt to save Jenkins'' global configuration before it has been loaded has been made during milestone Configuration for all jobs updated. This is indicative of a bug in the caller and may lead to full or partial loss of configuration.
java.lang.IllegalStateException: call trace
SEVERE jenkins.InitReactorRunner$1#onTaskFailed: Failed Finalizing set up
java.lang.IllegalStateException: An attempt to save the global configuration was made before it was loaded
Failed to start LSB: Jenkins Automation Server
SEVERE winstone.Logger#logInternal: Container startup failed
java.io.FileNotFoundException: /var/cache/jenkins/war/解决：
- 下载角色Role strategy hpi plugin文件，并将其放到
JENKINS_HOME/plugins文件夹，即：/var/lib/jenkins/plugins/中。然后查看进程中是否还有jenkins，因为测试发现系统服务启动后卡死，强制退出进程还在，ps -ef | grep jenkins，查看进程号并强制杀掉kill -9 xx。 - 还有部分权限问题：
chown -R jenkins:jenkins /var/cache/jenkins/war/
顺利启动后，打开配置页面白屏，控制台报错
TypeError: Cannot read properties of undefined (reading 'hasClassName')
TypeError: Cannot read properties of undefined (reading 'getElementsBySelector')解决：升级所有插件，重启jenkins可解决。