keith-turner commented on code in PR #6025:
URL: https://github.com/apache/accumulo/pull/6025#discussion_r2737753212


##########
server/base/src/main/java/org/apache/accumulo/server/compaction/CountingIterator.java:
##########
@@ -23,12 +23,15 @@
 import java.util.Map;
 import java.util.concurrent.atomic.AtomicLong;
 
+import javax.annotation.concurrent.NotThreadSafe;
+
 import org.apache.accumulo.core.data.Key;
 import org.apache.accumulo.core.data.Value;
 import org.apache.accumulo.core.iterators.IteratorEnvironment;
 import org.apache.accumulo.core.iterators.SortedKeyValueIterator;
 import org.apache.accumulo.core.iterators.WrappingIterator;
 
+@NotThreadSafe
 public class CountingIterator extends WrappingIterator {

Review Comment:
   Maybe the annotation does make sense from the perspective of its not 
expected for multiple threads to use an instance of this, even if it happens to 
export info to other threads.



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