SEVERE: Running with Java class version 53.0, but 52.0 is required error with Jenkins through command prompt as "java -jar jenkins.war"

Solution 1:

This error message...

SEVERE: Running with Java class version 53.0, but 52.0 is required.

...implies that you have tried to initialize Jenkins on a system which is using java class version 53.0 which stands for Java 9.

As per the Jenkins documentation on Java requirements the following are mentioned:

Java 8 is the ONLY supported runtime environment, both 32-bit and 64-bit versions are supported.
Older versions of Java are not supported.
Java 9 is not supported.
Java 10 and Java 11 preview support is available.
Support of these versions is available through custom packages
Running Jenkins with Java 10 and 11 (experimental support) page provides guidelines about running Jenkins with these versions.
These requirements apply to all components of the Jenkins system including Jenkins master, all types of agents, CLI clients, and other components.

Solution

There are two possible solutions as follows:

You can downgrade your Jenkins host JRE to Java 8 version and initiate Jenkins as follows:
```
${JAVA8_HOME}/bin/java -jar jenkins.war
```
You can upgrade your Jenkins host JRE to Java 10 or Java 11 version and initiate Jenkins along with the --enable-future-java flag as follows:
```
${JAVA10_HOME}/bin/java -jar jenkins.war --enable-future-java
```

Running Jenkins (without Docker)

Java 10

Download Jenkins WAR for 2.127 or above (or build the experimental branch)

Run the Jenkins WAR file with the following command:

${JAVA10_HOME}/bin/java --add-modules java.xml.bind -jar jenkins.war \
    --enable-future-java --httpPort=8080 --prefix=/jenkins

Java 11

Download Jenkins WAR for 2.127 or above (or build the experimental branch)
Download the following libraries to the same directory as jenkins.war
- jaxb-api-2.3.0.jar (save as jaxb-api.jar)
- jaxb-core-2.3.0.1.jar (save as jaxb-core.jar)
- jaxb-impl-2.3.0.1.jar (save as jaxb-impl.jar)
- javax.activation v.1.2.0 (save as javax.activation.jar)

Run the Jenkins WAR file with the following command:

${JAVA11_HOME}/bin/java \
    -p jaxb-api.jar:javax.activation.jar --add-modules java.xml.bind,java.activation \
    -cp jaxb-core.jar:jaxb-impl.jar \
    -jar jenkins.war --enable-future-java --httpPort=8080 --prefix=/jenkins

trivia

As per Java class file - Wikipedia following are the major version number of the class file format being used:

Java SE 11 = 55
Java SE 10 = 54
Java SE 9 = 53
Java SE 8 = 52
Java SE 7 = 51
Java SE 6.0 = 50
Java SE 5.0 = 49
JDK 1.4 = 48
JDK 1.3 = 47
JDK 1.2 = 46
JDK 1.1 = 45

Solution 2:

java -jar jenkins.war --enable-future-java

Solution 3:

Jenkins is supported java version are 8,11 . jenkins not supported older versions and java 9,10,12 and 13 too , you have to downgrade java version to 8 or 11

Solution 4:

I have installed Java 15 on my system. To run Jenkins with Java 15, please execute the below command.

D:\Selenium\Jenkins>java -jar jenkins.war -httpPort=9090 --enable-future-java

Change path to your war file.