diff --git a/commons/src/main/java/org/apache/commons/httpclient/Cookie.java b/commons/src/main/java/org/apache/commons/httpclient/Cookie.java
index 2dcf987a..e74e8ad4 100644
--- a/commons/src/main/java/org/apache/commons/httpclient/Cookie.java
+++ b/commons/src/main/java/org/apache/commons/httpclient/Cookie.java
@@ -560,6 +560,7 @@ public class Cookie extends NameValuePair implements Serializable, Comparator {
     * Collator for Cookie comparisons.  Could be replaced with references to
     * specific Locales.
     */
+   @SuppressWarnings("unused") // IA/HERITRIX ADDITION
    private static final RuleBasedCollator STRING_COLLATOR =
         (RuleBasedCollator) RuleBasedCollator.getInstance(
                                                 new Locale("en", "US", ""));
diff --git a/commons/src/main/java/org/archive/io/RecordingOutputStream.java b/commons/src/main/java/org/archive/io/RecordingOutputStream.java
index 74ca8ba3..ab211e69 100644
--- a/commons/src/main/java/org/archive/io/RecordingOutputStream.java
+++ b/commons/src/main/java/org/archive/io/RecordingOutputStream.java
@@ -24,7 +24,6 @@ import it.unimi.dsi.fastutil.io.FastBufferedOutputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.OutputStream;
-import java.nio.charset.Charset;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 import java.util.logging.Level;
diff --git a/commons/src/main/java/org/archive/net/ClientFTP.java b/commons/src/main/java/org/archive/net/ClientFTP.java
index b07abb63..0749e46c 100644
--- a/commons/src/main/java/org/archive/net/ClientFTP.java
+++ b/commons/src/main/java/org/archive/net/ClientFTP.java
@@ -19,7 +19,6 @@
 package org.archive.net;
 
 
-import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.StringReader;
 import java.net.Socket;
diff --git a/modules/src/main/java/org/archive/modules/fetcher/DefaultServerCache.java b/modules/src/main/java/org/archive/modules/fetcher/DefaultServerCache.java
index 68190d64..467c2a62 100644
--- a/modules/src/main/java/org/archive/modules/fetcher/DefaultServerCache.java
+++ b/modules/src/main/java/org/archive/modules/fetcher/DefaultServerCache.java
@@ -40,6 +40,7 @@ import org.archive.util.Supplier;
 public class DefaultServerCache extends ServerCache implements Closeable, Serializable {
     private static final long serialVersionUID = 1L;
 
+    @SuppressWarnings("unused")
     private static Logger logger =
         Logger.getLogger(DefaultServerCache.class.getName());