Jenkins building a Java project can't find a command Mvn,java workaround

Jenkins error when building a Java project:

$ mvn clean installfatal:command execution failedjava.io.ioexception:error=2, No such file or director Yat Java.lang.UNIXProcess.forkAndExec (Native Method) at java.lang.unixprocess.<init> (unixprocess.java:247) at Java.lang.ProcessImpl.start (processimpl.java:134) at Java.lang.ProcessBuilder.start (processbuilder.java:1029) Caused:java.io.IOException:Cannot Run Program ' MVN ' (in Directory "/var/lib/jenkins/workspace/es"): error=2, No such fil E or directory



Error Case 2:

/var/lib/jenkins/tools/hudson.tasks.maven_maveninstallation/maven_3.5.3/bin/mvn clean installwhich: No Java in (/var/lib/jenkins/tools/hudson.tasks.maven_maveninstallation/maven_3.5.3/bin:/sbin:/usr/sbin:/bin:/usr /bin)The JAVA_HOME environment variable is not defined correctlythis environment variable are needed to run this progr Amnb:java_home should point to a JDK not a jrebuild step ' Invoke top-level Maven targets ' marked build as Failurefinished : FAILURE

[INFO] Changes detected-recompiling the module! [INFO] compiling source files To/var/lib/jenkins/workspace/es/target/classes[info]------------------------------------ -------------------------[ERROR] Compilation ERROR: [INFO]-------------------------------------------------------------[ERROR] No compiler is provided in this environment. Perhaps is running on a JRE rather than a JDK?[INFO] 1 Error[info]-------------------------------------------------------------[INFO]------------------------- -----------------------------------------------[INFO] BUILD Failure[info]--------------------------------------- ---------------------------------[INFO] Total time:02:42 min[info] finished At:2018-05-29t18:32:22+08:00[info]----- -------------------------------------------------------------------[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.5.1:compile (Default-compile) on project Ruhnn-visual-search-background:compilation failure[ERROR] No compiler is provided in this environment. Perhaps is running on a JRE rather than a JDK?  [ERROR] [ERROR], [Help 1][ERROR] [ERROR]-See the full stack trace of the errors, re-run Maven with THE-E switch. [ERROR] re-run Maven using the-x switch to enable full debug logging. [ERROR] [ERROR] For more information about the errors and possible solutions, please read the following articles:< C8>[error] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException    


Workaround:

install maven and configure HTTPS in the Jenkins configuration://maven.apache.org/download.cgiwgethttp//mirror.bit.edu.cn/apache/maven/maven-3/3.5.2/binaries/apache-maven-3.5.2-bin.tar.gzTarZXVF apache-maven-3.5.2-bin.Tar. GZMVapache-maven-3.5.2/usr/local//usr/loca/apache-maven-3.5.2/BIN/MVN--VersionjenkinsSystem Management,Global Tools Configure MAVEN configurationSettingsfile inchFileSystem, File path/usr/local/apache-maven-3.5.2/conf/Settings.xmlglobal SettingsfileOn filesystemFile Path is pulled up and down to Maven,maven installation, Name (custom, such as Maven3.5.2), Maven_home fill "/usr/local/apache-maven-3.5.2" save" in the lower left corner

Installing MAVEN can also be consulted: http://www.cnblogs.com/weifeng1463/p/8920765.html

System Management --Global Tools Configuration JDK installation jdk  alias  JDK1. 8 automatically installs          the  Java SE Development Kit 8u162  from the java.sun.com installation version

The final test can be successfully built:

Jenkins building a Java project can't find a command Mvn,java workaround