Current implementation does not take in multiple arguments passed to EXTRA_JAVA_OPTS.

Eg:

EXTRA_JAVA_OPTS=-Djava.net.preferIPv4Stack -Xmx1024M 

ps -ef

/usr/bin/java -Djava.security.properties=/opt/opendaylight/etc/odl.java.security -Xms128M -Xmx2048m -XX:+UnlockDiagnosticVMOptions -XX:+HeapDumpOnOutOfMemoryError -Dcom.sun.management.jmxremote -Djava.security.egd=file:/dev/./urandom  .....

EXTRA_JAVA_OPTS options are missing when ODL is started

But with double quotes

EXTRA_JAVA_OPTS="-Djava.net.preferIPv4Stack -Xmx1024M"

/usr/bin/java -Djava.security.properties=/opt/opendaylight/etc/odl.java.security -Xms128M -Xmx2048m -XX:+UnlockDiagnosticVMOptions -XX:+HeapDumpOnOutOfMemoryError -Dcom.sun.management.jmxremote -Djava.net.preferIPv4Stack -Xmx1024M -Djava.security.egd=file:/dev/./urandom