Initially ServiceNow MID Servers only supported our OpenJDK JRE from Madrid onwards. Madrid is the version when we first started shipping this JRE as part of the Installer, and was what all MID Server-related release testing was done with.
Since London Patch 8 and Kingston Patch 14b HotFix1, the same OpenJDK JRE is included in those older versions.
|MID Server Installer||Java Runtime|
Oracle 1.8.0_152 JRE (8u152) is Supported and Distributed with the MID Server installer. Previously releases included 8u60, 8u40, 6u45 & 6u14 and were the 'supported version' at the time, and would have been upgraded along with the MID Server.
Kingston Patch 14b HotFix1 included the OpenJDK 1.8.0_181 JRE, as used in Madrid.
No JRE is included in the full Installer ZIP file for London Patch 7 and below.
However, if the MID Server was installed <=Kingston, then an upgraded London MID Server will continue to use the Oracle JRE originally installed by ServiceNow.
London Patch 8 and later includes the OpenJDK 1.8.0_181 JRE, as used in Madrid.
|Madrid / New York||A ServiceNow build of OpenJDK 1.8.0_181 JRE is Supported and Included. |
MID Servers installed before Madrid that are still using the Oracle JRE will have it replaced by the OpenJDK JRE.
All, although primarily in relation to MID Server JRE changes in Kingston, London and Madrid.
A MID Server downgraded from Madrid to an earlier version will have the JRE replaced with the Oracle one again. During Madrid testing, it was found that a Kingston MID Server running an OpenJDK based JRE inherited from Madrid will be unable to upgrade again, due to errors detecting the JRE version, and blocking the auto-upgrade process (see PRB1319796, which was fixed before Madrid GA release).