Index: streams/src/main/java/org/apache/kafka/streams/state/internals/NamedCache.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- streams/src/main/java/org/apache/kafka/streams/state/internals/NamedCache.java	(revision b9738d4d704401cd9f555502fbcfcebd17dc1618)
+++ streams/src/main/java/org/apache/kafka/streams/state/internals/NamedCache.java	(date 1564528638000)
@@ -266,6 +266,10 @@
         return cache.size();
     }
 
+    public boolean isEmpty() {
+        return cache.isEmpty();
+    }
+
     synchronized Iterator<Map.Entry<Bytes, LRUNode>> subMapIterator(final Bytes from, final Bytes to) {
         return cache.subMap(from, true, to, true).entrySet().iterator();
     }
Index: streams/src/main/java/org/apache/kafka/streams/state/internals/ThreadCache.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- streams/src/main/java/org/apache/kafka/streams/state/internals/ThreadCache.java	(revision b9738d4d704401cd9f555502fbcfcebd17dc1618)
+++ streams/src/main/java/org/apache/kafka/streams/state/internals/ThreadCache.java	(date 1564528638000)
@@ -235,7 +235,7 @@
             // a put on another cache. So even though the sizeInBytes() is
             // still > maxCacheSizeBytes there is nothing to evict from this
             // namespaced cache.
-            if (cache.size() == 0) {
+            if (cache.isEmpty()) {
                 return;
             }
             cache.evict();