dengzhhu653 commented on code in PR #6142:
URL: https://github.com/apache/hive/pull/6142#discussion_r2464393374
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standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/leader/LeaderElectionContext.java:
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@@ -97,40 +95,32 @@ private LeaderElectionContext(String servHost,
Configuration conf,
}
public void start() throws Exception {
- Map<TTYPE, List<LeadershipStateListener>> listenerMap = this.listeners;
- if (conf.getBoolean(LEADER_IN_TEST, false)) {
- Map<TTYPE, List<LeadershipStateListener>> newListeners = new HashMap<>();
- newListeners.put(TTYPE.HOUSEKEEPING, new ArrayList<>());
- listenerMap.forEach((k, v) ->
newListeners.get(TTYPE.HOUSEKEEPING).addAll(v));
- listenerMap = newListeners;
- }
- for (Map.Entry<TTYPE, List<LeadershipStateListener>> entry :
- listenerMap.entrySet()) {
- List<LeadershipStateListener> listenerList = entry.getValue();
+ List<TTYPE> ttypes = new ArrayList<>(listeners.keySet());
+ Collections.shuffle(ttypes);
Review Comment:
there are two types of leaders, shuffling the types let other HMS instances
have a chance to win the election on different types.
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