static void setFailure(final KVStoreClosure closure, final String message) {
        if (closure != null) {
            // closure is null on follower node
            closure.setError(Errors.STORAGE_ERROR);
            closure.run(new Status(RaftError.EIO, message));
        }
    }
Sets failure, if current node is a leader, reply to
client failure response.

@param closure callback
@param message error message
jraft-rheakv/rheakv-core/src/main/java/com/alipay/sofa/jraft/rhea/storage/BaseRawKVStore.java