[infinispan-issues] [Red Hat JIRA] (ISPN-12662) Functional commands break in replicated caches on zero-capacity nodes

Functional commands break in replicated caches on zero-capacity nodes --------------------------------------------------------------------- Key: ISPN-12662 URL: https://issues.redhat.com/browse/ISPN-12662 Project: Infinispan Issue Type: Bug Components: Core Affects Versions: 12.0.0.Final Reporter: Dan Berindei Assignee: Dan Berindei Priority: Major Fix For: 12.1.0.Final, 12.0.1.Final In replicated embedded caches, {{BaseDistributionInterceptor}} on the primary owner sends write commands (including functional write commands) to all the other cache members, using {{RpcManager.invokeCommandOnAll()}}. The write commands will execute on all the cache members, including zero-capacity nodes, and an exception response from any cache member will fail the operation. Functional commands like {{ReadWriteKeyCommand}} assume they can read the previous value for the affected key on any node where they execute. A zero-capacity node doesn't have the previous value, so it should ignore the command and pretend it was applied, but instead it wraps a {{null}} value in the invocation context and tries to invoke the lambda anyway. Clustered locks are affected by this issue, but it's hidden because of ISPN-12548.