jenkins构建java项目时出现的报错情况：

$mvn clean install

FATAL: command execution failed

java.io.IOException: error=2, No such file or directory

at java.lang.UNIXProcess.forkAndExec(Native Method)

at java.lang.UNIXProcess.(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 file or directory

报错情况2：

/var/lib/jenkins/tools/hudson.tasks.Maven_MavenInstallation/maven_3.5.3/bin/mvn clean install

which: 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 correctly

This environment variable is needed to run this program

NB: JAVA_HOME should point to a JDK not a JRE

Build step 'Invoke top-level Maven targets' marked build as failure

Finished: FAILURE

报错情况3：

[INFO] Changes detected - recompiling the module!

[INFO] Compiling 33 source files to /var/lib/jenkins/workspace/es/target/classes

[INFO] -------------------------------------------------------------

[ERROR] COMPILATION ERROR :

[INFO] -------------------------------------------------------------

[ERROR] No compiler is provided in this environment. Perhaps you are 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 you are running on a JRE rather than a JDK?

[ERROR]

[ERROR] -> [Help 1]

[ERROR]

[ERROR] To 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:

解决方法:

安装maven 并配置到jenkins配置里

下载地址 https://maven.apache.org/download.cgi

wget http://mirror.bit.edu.cn/apache/maven/maven-3/3.5.2/binaries/apache-maven-3.5.2-bin.tar.gz

tar zxvf apache-maven-3.5.2-bin.tar.gzmv apache-maven-3.5.2 /usr/local/

/usr/loca/apache-maven-3.5.2/bin/mvn --version

jenkins-> 系统管理 ->全局工具配置

Maven Configuration-> Settings file in filesystem -> File Path /usr/local/apache-maven-3.5.2/conf/settings.xml

Global settingsfile on filesystem ->File Path 同上

下拉到Maven，Maven安装，Name(自定义，如maven3.5.2)，MAVEN_HOME填 “/usr/local/apache-maven-3.5.2”

左下角“save”

安装maven 也可以参考：http://www.cnblogs.com/weifeng1463/p/8920765.html

安装jdk

jenkins-> 系统管理 ->全局工具配置

JDK安装

JDK 别名 JDK1.8自动安装

从java.sun.com 安装

版本 Java SE Development Kit 8u162

最后测试可以成功构建：