sanpwc commented on code in PR #6971:
URL: https://github.com/apache/ignite-3/pull/6971#discussion_r2538002344


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modules/runner/src/main/java/org/apache/ignite/internal/app/NodePropertiesImpl.java:
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@@ -67,16 +70,26 @@ private void detectAndSaveColocationStatusIfNeeded() {
         VaultEntry entry = vaultManager.get(ZONE_BASED_REPLICATION_KEY);
         if (entry != null) {
             colocationEnabled = entry.value()[0] == 1;
-
+            if (!colocationEnabled) {
+                throw new 
IgniteException(UNSUPPORTED_TABLE_BASED_REPLICATION_ERR, "Table based 
replication is no longer supported."
+                        + " Downgrade back to 3.1 and copy your data to a 
cluster of desired version.");
+            }
             logComment = "from Vault";
         } else {
             boolean freshNode = vaultManager.name() == null;
             if (freshNode) {
                 colocationEnabled = IgniteSystemProperties.colocationEnabled();
+                // TODO https://issues.apache.org/jira/browse/IGNITE-22522 
Remove.
+                // It's a temporary code that will be removed when !colocation 
mode will be fully dropped. That's the reason why instead of
+                // introducing new error code, existing somewhat related is 
used.
+                if (!colocationEnabled) {
+                    throw new IgniteException(ILLEGAL_ARGUMENT_ERR, "Table 
based replication is no longer supported, consider restarting"

Review Comment:
   Not applicable, it won't be possible to start the fresh node in 
non-colocation mode.



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