Java Virtual Machine Requirements
MarkLogic Server can function with or without a Java Virtual Machine (JVM). The only requirement needed for a JVM to be installed on MarkLogic Server would be if you use HDFS (Hadoop Distributed File System).
Our provided Amazon AMIs have a JDK pre-installed that is used during the MarkLogic bootstrap process to setup and configure MarkLogic in the Amazon environment. Therefore, you do not need to install a JVM on any EC2 instance.
The following MarkLogic products and features require a JVM to either run or install:
MarkLogic supports the Java 8, 9, 10, and 11 versions of the following JVMs:
Oracle/Sun
OpenJDK
Note
The IBM JRE is not supported.
By default, MarkLogic looks for Java in the location specified via the JAVA_HOME environment variable or in a specific set of default locations. If JAVA_HOME is not set in the startup environment, MarkLogic uses the first JRE or JDK found in one of the following locations. These locations are searched in the order listed.
/usr/java/default/usr/java/latest/usr/java/jdk1.N*
*where N is a supported Java version. For example, /user/java/jdk1.8.0_202.
/usr/lib/jvm/java/usr/lib/jvm/java-openjdk/usr/lib/jvm/jre-1.N.0-*.x86_64
*where N is a supported Java version, such as Java 8.
If you have Java installed in a different location, you can communicate your JAVA_HOME to MarkLogic through the file /etc/marklogic.conf. For example:
cat > /etc/marklogic.conf export JAVA_HOME=/path/to/your/jdk