There's currently a check in `TransportService.HandshakeResponse.isIncompatibleBuild` to stop ES with the same Version but different build hashes from joining a cluster. This needs to be relaxed for cloud deployments where Version is not applicable
server/src/main/java/org/elasticsearch/transport/TransportService.java
timeoutInfoHandlers.remove(requestId);
                }
            }
        }
        /**
         * cancels timeout handling. this is a best effort only to avoid running it. remove the requestId from {@link #responseHandlers}
         * to make sure this doesn't run.
         */
        public void cancel() {
            assert responseHandlers.contains(requestId) == false
                : "cancel must be called after the requestId [" + requestId + "] has been removed from clientHandlers";
            if (cancellable != null) {
                cancellable.cancel();
            }
        }
        @Override
        public String toString() {
            return "timeout handler for [" + requestId + "][" + action + "]";
        }
        private void scheduleTimeout(TimeValue timeout) {
            this.cancellable = threadPool.schedule(this, timeout, ThreadPool.Names.GENERIC);
        }
    }
    record TimeoutInfoHolder(DiscoveryNode node, String action, long sentTime, long timeoutTime) {}
    /**
     * This handler wrapper ensures that the response thread executes with the correct thread context. Before any of the handle methods
     * are invoked we restore the context.
     */
    public static final class ContextRestoreResponseHandler<T extends TransportResponse> implements TransportResponseHandler<T> {