GridServer 5.2.1 Hotfix8 has been released. Here are the release notes:
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Affected Components for 5.2.1_hotfix08

The following components are updated by this hotfix:

C++ Specific
Engine
Java Specific
Manager
Tomcat

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Closed Issues in 5.2.1_hotfix08 (This Release)

C++ Specific
GS-17239
Fixed an issue where a C++ Driver would return an incorrect encrypted error message for "exception in taskCompleted."

GS-17003
After a task completes with errors and encryption is enabled, the corresponding Driver now properly decrypts the error message in the task payload.

GS-17237
Added a checksum and additional verification for encryption keys for task payload data. This alleviates a rare condition where task payloads were unable to properly decrypt the task data.


Engine
GS-17261
For SSL Grids, the default security has been updated to TLS 1.2.  If you are upgrading to this version, you will have to manually update the server.xml configuration file to TLS 1.2 as the hotfix upgrade process will not overwrite existing server.xml files.


Java Specific
GS-17256
The Engine JRE has been updated to Java 1.8.0_301.


Manager
GS-16998
Added the ability to add Unix Engines to the Grid when the Primary Director is down.


Tomcat
GS-17255
The bundled Apache Tomcat has been upgraded to version 8.5.72.

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To download this hotfix, login to the Support Portal and navigate to Downloads > Hotfixes > AvailableDownloads > DataSynapse > GridServer > 5.2.1.