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Update of Third-party Components
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The following versions of third-party components are recommended:
   
   Apache 2.4.29+       
   Subversion 1.10.x  
   PostgreSQL 11  
   AdoptOpenJDK 11 (LTS)    
   

WARNING!

	SVN versions 1.10.x and 1.11.x have an issue with Groups defined in the AuthZ file that don’t have an associated account. (This issue was resolved SVN 1.12.0)
	 
	For new Polarion installations:

	The following property is added automatically and set to "false":
	com.polarion.platform.repository.canHaveEmptyRolesInSvnAccessFile=false
	A dummy user is automatically assigned to every Group. (It's only visible in the svn access file.)
	
	IMPORTANT!
	Do not delete this dummy user (ID=KF9Nrsnp9Ad) in the svn access file or create a user with the same name.

	For existing Polarion installations:

	If you update your Linux distribution to a version that contains SVN (1.10.x – 1.11.x) you should either:

	a) Add the following property to the polarion.properties file and manually assign a user to all Groups in the AuthZ file:
	
	com.polarion.platform.repository.canHaveEmptyRolesInSvnAccessFile=false
	
	b) Check whether your selected Linux distribution has already incorporated the patched SVN. (1.10.6 – 24 July 2019 and onwards)
	
	See the "Required third-party software components" section in the "Appendix" chapter of the Linux install guide for details. 
	- An HTML version of the guide can be found at: https://polarion.plm.automation.siemens.com/documentation/latest  
	
	 

IMPORTANT!
   
   Polarion no longer supports Oracle's Java SE Development Kit 8 and now only supports OpenJDK 11. 
   
   Recommendation: Use AdoptOpenJDK 11 (LTS). It is continuously tested with Polarion and offers long-term support.
   It can be found at: https://adoptopenjdk.net/releases.html?variant=openjdk11&jvmVariant=hotspot 
   
   When updating to OpenJDK, please remember to do the following:

   1. Update variable JDK_HOME in /opt/polarion/etc/config.sh.

   NOTE: If you've added extra GC-related runtime parameters for Java, you will need to update them accordingly for OpenJDK 11. 
   (The JVM may fail to start with Java 8 style GC options.)  

   2. Back up your Java keystore before making the switch to OpenJDK.
   See the  "Update Java" and "Import Java Keystore certificate" sections in the Linux installation guide for details. 

You can download or view the latest documentation in the Polarion section of Siemens' Doc Center at:
   https://polarion.plm.automation.siemens.com/documentation/latest
   
   
   

PostgreSQL
----------
Manually updating PostgreSQL to any version other than the one bundled in the distributions and 
installed by the installer programs/scripts is NOT recommended until support for it is officially 
announced and update scripts and/or documentation are available.

Update Your Distribution
------------------------
Please take the usual steps specific to your Linux distribution.