diff --git a/CHANGES.txt b/CHANGES.txt
index 706a3edeac..ec59fa6636 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,4 +1,5 @@
 4.0
+ * Fix generating javadoc with Java11 (CASSANDRA-14988)
  * Only cancel conflicting compactions when starting anticompactions and sub range compactions (CASSANDRA-14935)
  * Use a stub IndexRegistry for non-daemon use cases (CASSANDRA-14938)
  * Don't enable client transports when bootstrap is pending (CASSANDRA-14525)
diff --git a/src/java/org/apache/cassandra/hints/HintsBufferPool.java b/src/java/org/apache/cassandra/hints/HintsBufferPool.java
index f705de1ffb..7f66efd218 100644
--- a/src/java/org/apache/cassandra/hints/HintsBufferPool.java
+++ b/src/java/org/apache/cassandra/hints/HintsBufferPool.java
@@ -18,14 +18,12 @@
 package org.apache.cassandra.hints;
 
 import java.io.Closeable;
-import java.io.IOException;
 import java.util.UUID;
 import java.util.concurrent.BlockingQueue;
 import java.util.concurrent.LinkedBlockingQueue;
 
 import org.apache.cassandra.config.Config;
 import org.apache.cassandra.net.MessagingService;
-import sun.nio.ch.DirectBuffer;
 
 /**
  * A primitive pool of {@link HintsBuffer} buffers. Under normal conditions should only hold two buffers - the currently