Description
When the content is already released on encoding (for example if a BinaryDocument is retried) then the IllegalReferenceCountException from netty is swallowed from here: https://github.com/couchbase/couchbase-jvm-core/blob/master/src/main/java/com/couchbase/client/core/endpoint/kv/KeyValueHandler.java#L212 leading to a timeout.
We can do better to catch and propagate any errors to make it obvious whats going on.