GridServer 6.3.1 Hotfix11 has been released. Here are the release notes:
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Introduction
  
Hotfixes are cumulative.
  
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Affected Components for 6.3.1_hotfix11
 
The following components are updated by this hotfix:
 
Engine
Java Specific
Manager
Security
Tomcat
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Closed Issues in 6.3.1_hotfix11 (This Release)

Engine
GS-19514
An issue where the Engine restarts due to a NullPointerException in the HTTP 503 retry logic is fixed. It also resolves 
IllegalStateException errors that occur when the system calls writeToStream with a null object during task output serialization.

Java Specific
GS-19541
The service.bat script now correctly evaluates the system's Java version.

GS-18897
Java 21 support is added to the Engine and Driver.

GS-18957 / GS-18896 
Java 17 support is now added to the Engine. While the GridServer Manager and Driver run on Java 17 automatically, you must manually 
configure the Engines. To enable Java 17 support, you must add the following parameter to the Engine JVM Command Line Argument field 
in the Engine JVM section under Engine Configuration:
--add-exports=java.desktop/com.sun.beans.editors=ALL-UNNAMED

Manager
GS-19012 
A legacy JAR file introduced in hotfix 8, is removed now. The removal of the older JAR file ensures preventing the classpath 
conflicts and  the system utilizes the correct and updated commons-6.3.1.180656.jar for stable operation.

Security
GS-19786 / GS-19313 
The following third party libraries are updated to the recent compatible versions:
c3p0: 0.13.0
commons-fileupload: 1.6.0
jackson-core: 2.15.0
jdom2: 2.0.6.1
httpclient: 4.5.14
xalan: 2.7.3
commons-io: 2.17.0
json: 20240303
commons-codec: 1.17.1
guava: 33.4.8-jre
Note: Only 64bit artifacts have been upgraded.

Tomcat
GS-19442 / GS-19294
Apache Tomcat has been upgraded to 9.0.117.
 
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To download this hotfix, login to the Support Portal and navigate to Downloads > Hotfixes > AvailableDownloads > DataSynapse > GridServer > 6.3.1.

GridServer 6.3.1 Hotfix11 Release Announcement