Umeshkumar9414 commented on code in PR #6129:
URL: https://github.com/apache/hbase/pull/6129#discussion_r1698997639


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hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterRpcServices.java:
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@@ -2567,6 +2573,17 @@ public ReportProcedureDoneResponse 
reportProcedureDone(RpcController controller,
     return ReportProcedureDoneResponse.getDefaultInstance();
   }
 
+  private void throwOnOldMasterStartCode(Stream<Long> masterStartCodeStream)
+    throws MasterNotRunningException {
+    long masterStartCodeFromProc = 
masterStartCodeStream.max(Long::compare).orElse(-1L);
+    // -1 is less than any possible MasterStartCode
+
+    if (masterStartCodeFromProc > server.getStartcode()) {

Review Comment:
   yes. 
[Here](https://github.com/apache/hbase/blob/2a4203f6fcb63b4563ea660fb03b0b9648b944ac/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java#L2356)
 is the logic



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