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Version: 3.7.x.x LTS

Migrating to OpenJDK

nevisAppliance​

nevisAdmin​

Perform the following steps to migrate an existing nevisAdmin instance running with adnjdk18 to OpenJDK 1.8.0:

  1. Set the following variables in the environment configuration file:

    # /var/opt/nevisadmin/<instance name>/conf/env.conf
    RTENV_SECURITY_CHECK=no_shell
    export JAVA_HOME=/etc/alternatives/jre_1.8.0
    export AS_JAVA=/etc/alternatives/jre_1.8.0
Java Lookup Order

nevisAdmin has the following Java lookup order:

  1. Environment variables (as defined in the env.conf file).
    • JAVA_HOME is used by nevisAdmin shell scripts.
    • AS_JAVA is used by adnglassfish.
  2. /opt/adnjdk1*
  3. javac from PATH.

  1. Restart the nevisAdmin instance:

    nevisadmin <instance name> restart

nevisAgent​

Perform the following steps to migrate an existing nevisAgent instance running with adnjdk18 to OpenJDK 1.8.0:

  1. SetJAVA_HOME in the environment configuration file:

    # /var/opt/nevisagent/<instance name>/conf/env.conf
    JAVA_HOME=/etc/alternatives/jre_1.8.0
Java Lookup Order

nevisAgent has the following Java lookup order:

  1. JAVA_HOME (defined in the env.conf file).
  2. /opt/adnjdk1*
  3. java from PATH.

  1. Restart the nevisAgent instance:

    nevisagent <instance name> restart

RHEL 7​

Perform the following steps to install OpenJDK 1.8.0:

  1. Check whether OpenJDK 1.8.0 JDK (the java-1.8.0-openjdk-devel package) is installed on your operating system:

    yum list installed java-1.8.0-openjdk-devel

  2. Install the package in case it is not available:

    yum install java-1.8.0-openjdk-devel

If no other components use adnjdk18, you can now remove the adnjdk18package. Java is taken from the PATH. No following steps are required.

nevisAdmin​

Perform the next steps to migrate an existing nevisAdmin instance:

  1. Ensure OpenJDK 1.8.0 JDK is installed (see RHEL 7)

  2. Uninstall adnjdk18 or set JAVA_HOME in the environment configuration file:

    # /var/opt/nevisadmin/<instance name>/conf/env.conf
    RTENV_SECURITY_CHECK=no_shell
    export JAVA_HOME=/etc/alternatives/jre_1.8.0
    export AS_JAVA=/etc/alternatives/jre_1.8.0
Java Lookup Order

nevisAdmin has the following Java lookup order:

  1. Environment variables (as defined in the env.conf file).
    • JAVA_HOME is used by nevisAdmin shell scripts.
    • AS_JAVA is used by adnglassfish.
  2. /opt/adnjdk1* (if installed).
  3. javac from PATH.

  1. Restart the nevisAdmin instance:

    nevisadmin <instance name> restart

nevisAgent​

Perform the next steps to migrate an existing nevisAgent instance:

  1. Ensure that OpenJDK 1.8.0 JDK is installed (see RHEL 7).

  2. Uninstall adnjdk18or set the following variables via the environment configuration file:

    # /var/opt/nevisagent/<instance name>/conf/env.conf
    JAVA_HOME=/etc/alternatives/jre_1.8.0
Java Lookup Order

nevisAgent has the following Java lookup order:

  1. JAVA_HOME environment variable (defined in the env.conf file).
  2. /opt/adnjdk1* (if installed).
  3. java from PATH.

  1. Restart the nevisAgent instance:

    nevisagent <instance name> restart