Please note that the below steps should only be used to perform Java minor version upgrade only on Silver Fabric Hawk Distribution.
1) Download and install the selected JDK - (JDK A.B.C_zz)
For example:
/opt/java/1.8.0_251

2) Add the javac and tools.jar files from the jdkA.B.C_zz package into its JRE package.
For example:
cp /opt/java/1.8.0_251/bin/javac /opt/java/1.8.0_251/jre/bin
cp /opt/java/1.8.0_251/lib/tools.jar /opt/java/1.8.0_251/jre/lib

3) Copy the SilverFabric Hawk distribution gridlib file from the SF Broker's gridlib location to a temporary location.

4) Extract the SilverFabric Hawk distribution gridlib in the temporary location

5) Navigate to the tibcojre64/ directory in the extracted location under /opt/temp/TIB_SilverFabric_hawkforEnabler_5.2.0_0_linux26gl23_x86_64_distribution_gridlib/ and rename the directory A.B.C under tibcojre64/ to A.B.C.yy.backup.YYYYMMDD.

For example:
cd /opt/temp/TIB_SilverFabric_hawkforEnabler_5.2.0_0_linux26gl23_x86_64_distribution_gridlib/tibcojre64/
mv 1.8.0 1.8.0.backup

6) Copy the downloaded and altered external JRE from step 2 to the tibcojre64 directory in the extracted location and rename the newly copied jre directory as [A.B.C].

This is required in order to maintain the original folder structure.
For example:
cp -R /opt/java/1.8.0_251/jre /opt/temp/TIB_SilverFabric_hawkforEnabler_5.2.0_0_linux26gl23_x86_64_distribution_gridlib/tibcojre64/
mv jre 1.8.0

7) Re-zip all the files under /opt/temp/TIB_SilverFabric_hawkforEnabler_5.2.0_0_linux26gl23_x86_64_distribution_gridlib as TIB_SilverFabric_hawkforEnabler_5.2.0_0_linux26gl23_x86_64_distribution_gridlib.zip.

8) Delete the original gridlibrary (TIB_SilverFabric_hawkforEnabler_5.2.0_0_linux26gl23_x86_64_distribution_gridlib.zip) from the broker under [SF_ROOT]/fabric/webapps/livecluster/deploy/resources/gridlib/ and deploy the new gridlibrary created on Step 7.

9) Once the updated Hawk distribution is deployed to Silver Fabric, the Hawk running components will turn to red, just restart all out of date components, then all of them should be restarted with updated Hawk 5.2.0 distribution.

10) Check the java version from the <Engine_installation_path>\work\<instance>\tibco\tibcojre64\1.8\bin directory which should show the updated JRE version as 1.8.0_251

java version "1.8.0_251"
Java(TM) SE Runtime Environment (build 1.8.0_251-b08)
Java HotSpot(TM) 64-Bit Server VM (build 25.251-b08, mixed mode)