ableegoldman commented on a change in pull request #11424:
URL: https://github.com/apache/kafka/pull/11424#discussion_r740700461



##########
File path: 
streams/src/main/java/org/apache/kafka/streams/processor/internals/InternalTopologyBuilder.java
##########
@@ -385,7 +385,7 @@ public synchronized final InternalTopologyBuilder 
rewriteTopology(final StreamsC
         
setApplicationId(config.getString(StreamsConfig.APPLICATION_ID_CONFIG));
 
         // maybe strip out caching layers
-        if (config.getLong(StreamsConfig.CACHE_MAX_BYTES_BUFFERING_CONFIG) == 
0L) {
+        if (config.getLong(StreamsConfig.STATESTORE_CACHE_MAX_BYTES_CONFIG) == 
0L) {

Review comment:
       Ah I wasn't trying to suggest we shouldn't start using the new config 
name everywhere, we absolutely should (even if it does explode the PR quite a 
bit -- I'll live). My point here was that we need to check the value of both of 
these configs, since we don't know which (if any) the user actually set.
   
   Which, by the way,  you can check via `config.originals()` -- this returns 
the set of configs the user passed in, otherwise it's tricky to figure out 
since eg `config.getLong` would return the config default value if not set




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