When using a custom built deployment compiled from Maven repository, Jive on-premise 9.5 instance installation fails to start after upgrading from 9.0.5 with the error
Invocation of init method failed; nested exception is java.security.KeyStoreException: JCEKS not found.
Please ensure that you are running JDK version to 1.8.0_242 on your Maven development environment and all project artefacts are pointing towards the correct Jive project files in the Maven POM file before compiling the project.
This issue occurs when there is a JDK version mismatch as Jive versions are tightly coupled with Java JDK versions. The highest JDK version currently compatible with the latest versions of Jive software is JDK 1.8.0_242 and there was a breaking change introduced after this JDK version that affects one of the encryption classes (RSAKeyGenerator) that is used in Jive.