[GitHub] [ratis] leo65535 commented on a diff in pull request #714: RATIS-1673. Verify duplicate peerid when init raft group

[GitBox <gi...@apache.org>]

leo65535 commented on code in PR #714:
URL: https://github.com/apache/ratis/pull/714#discussion_r947364738


##########
ratis-common/src/main/java/org/apache/ratis/protocol/RaftGroup.java:
##########
@@ -62,7 +62,12 @@ private RaftGroup(RaftGroupId groupId, Iterable<RaftPeer> peers) {
       this.peers = Collections.emptyMap();
     } else {
       final Map<RaftPeerId, RaftPeer> map = new HashMap<>();
-      peers.forEach(p -> map.put(p.getId(), p));
+      peers.forEach(p -> {
+        Preconditions.assertTrue(!map.containsKey(p.getId()),
+            () -> "PeerId " + p.getId() + " has already appeared in this group.");

Review Comment:
   Make sense.



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