SerializationConfiguration.advancedExternalizers() map should not be mutable ---------------------------------------------------------------------------- Key: ISPN-7634 URL: https://issues.jboss.org/browse/ISPN-7634 Project: Infinispan Issue Type: Bug Components: Configuration, Core Affects Versions: 9.0.0.CR2 Reporter: Dan Berindei Assignee: Dan Berindei Priority: Minor Fix For: 9.1.0.Final Currently {{SerializationConfiguration.advancedExternalizers()}} returns a mutable {{HashMap}}. We only read it once on startup, so modifying it won't break anything, but it should be immutable to make it clear that externalizers cannot be added at runtime.