airborne12 commented on code in PR #64522:
URL: https://github.com/apache/doris/pull/64522#discussion_r3490861319


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fe/fe-core/src/main/java/org/apache/doris/DorisFE.java:
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@@ -145,6 +146,11 @@ public static void start(String dorisHomeDir, String 
pidDir, String[] args, Star
             // Must init custom config after init config, separately.
             // Because the path of custom config file is defined in fe.conf
             config.initCustom(Config.custom_config_dir + "/fe_custom.conf");
+            if (Config.inverted_index_storage_format.equalsIgnoreCase("V1")) {

Review Comment:
   Blocking: this makes an upgraded FE fail to start if operators still have 
`inverted_index_storage_format=V1` in `fe.conf` or `fe_custom.conf`. The PR 
contract is to block *new* V1 creation while keeping existing V1 metadata 
compatible; a startup failure turns a deprecated default into an availability 
break. Please allow startup and enforce the ban only when materializing the 
effective format for new table/index creation (for example, normalize/reject 
`DEFAULT + config=V1` on the DDL path).



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