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I am in the process of configuring jenkins on server. There is no Java installed on server. From the link, I understood that Jenkins windows installer will install JRE so that no need of external java installation.jenkins windows installer But when I ran the command java-version it returns error that no java installed. So it required to install java seperately? Is it needed for jenkins to run java on the server?

Ammu
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2 Answers2

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It is possible that the setup installs a private JRE (see https://stackoverflow.com/questions/19510169/what-are-the-differences-between-private-jre-and-public-jre) so it is not visible outside of Jenkins dir.

Community
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tomasdeml
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  • So Jenkins can make use of this when needed? No need of Java installed? – Ammu Jun 24 '16 at 06:20
  • Yes, Jenkins is a Java app and cannot even start without JRE. With private JRE, you _have_ Java installed, just privately using xcopy deployment. – tomasdeml Jun 24 '16 at 09:46
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You need Java installed because Jenkins generally works from a tomcat server and installing tomcat requires java. If you are in windows, then you need to set the correct PATH variables as well - JAVA_HOME variable to be specific and also add the bin folder to the PATH

abhishek_M
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  • I have installed Jenkins and there is no Java installed in the VM. But it is working fine. So where this will cause problems because of Java not installed? – Ammu Jun 24 '16 at 06:20