davidradl commented on code in PR #26426:
URL: https://github.com/apache/flink/pull/26426#discussion_r2034824536


##########
flink-core/src/main/java/org/apache/flink/configuration/Configuration.java:
##########
@@ -258,12 +270,28 @@ public void addAll(Configuration other, String prefix) {
         bld.append(prefix);
         final int pl = bld.length();
 
-        synchronized (this.confData) {
-            synchronized (other.confData) {
-                for (Map.Entry<String, Object> entry : 
other.confData.entrySet()) {
-                    bld.setLength(pl);
-                    bld.append(entry.getKey());
-                    this.confData.put(bld.toString(), entry.getValue());
+        Object lock1 = this.confData;

Review Comment:
   I suggest lock1 -> thisConfDataLock
   lock2 -> otherConfDataLock



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