diff --git a/processing/src/main/java/org/apache/druid/annotations/SuppressFBWarnings.java b/processing/src/main/java/org/apache/druid/annotations/SuppressFBWarnings.java
index fb1d5b1a126d..f3e899d871a4 100644
--- a/processing/src/main/java/org/apache/druid/annotations/SuppressFBWarnings.java
+++ b/processing/src/main/java/org/apache/druid/annotations/SuppressFBWarnings.java
@@ -25,6 +25,7 @@
 /**
  * Annotation for suppressing spotbugs checks when necessary.
  */
+@SuppressWarnings("unused")
 @Retention(RetentionPolicy.CLASS)
 public @interface SuppressFBWarnings
 {
diff --git a/processing/src/main/java/org/apache/druid/data/input/FirehoseFactory.java b/processing/src/main/java/org/apache/druid/data/input/FirehoseFactory.java
index 986d1d94a5e4..5561dc933725 100644
--- a/processing/src/main/java/org/apache/druid/data/input/FirehoseFactory.java
+++ b/processing/src/main/java/org/apache/druid/data/input/FirehoseFactory.java
@@ -86,6 +86,7 @@ default Firehose connectForSampler(T parser, @Nullable File temporaryDirectory)
     return connect(parser, temporaryDirectory);
   }
 
+  @SuppressWarnings("unused")
   @JsonIgnore
   default boolean isSplittable()
   {
diff --git a/processing/src/main/java/org/apache/druid/data/input/FirehoseFactoryToInputSourceAdaptor.java b/processing/src/main/java/org/apache/druid/data/input/FirehoseFactoryToInputSourceAdaptor.java
index 35322c2a0fdf..ca74798e96fe 100644
--- a/processing/src/main/java/org/apache/druid/data/input/FirehoseFactoryToInputSourceAdaptor.java
+++ b/processing/src/main/java/org/apache/druid/data/input/FirehoseFactoryToInputSourceAdaptor.java
@@ -45,11 +45,6 @@ public FiniteFirehoseFactory getFirehoseFactory()
     return firehoseFactory;
   }
 
-  public InputRowParser getInputRowParser()
-  {
-    return inputRowParser;
-  }
-
   @Override
   public boolean isSplittable()
   {
diff --git a/processing/src/main/java/org/apache/druid/data/input/InputFormat.java b/processing/src/main/java/org/apache/druid/data/input/InputFormat.java
index 4957bfb1e975..345b47ca3ee9 100644
--- a/processing/src/main/java/org/apache/druid/data/input/InputFormat.java
+++ b/processing/src/main/java/org/apache/druid/data/input/InputFormat.java
@@ -58,6 +58,7 @@ public interface InputFormat
    * This method is not being used anywhere for now, but should be considered
    * in {@link SplittableInputSource#createSplits} in the future.
    */
+  @SuppressWarnings("unused")
   @JsonIgnore
   boolean isSplittable();
 
diff --git a/processing/src/main/java/org/apache/druid/indexer/TaskLocation.java b/processing/src/main/java/org/apache/druid/indexer/TaskLocation.java
index 1cc83db4d82f..fe8accd33d33 100644
--- a/processing/src/main/java/org/apache/druid/indexer/TaskLocation.java
+++ b/processing/src/main/java/org/apache/druid/indexer/TaskLocation.java
@@ -21,7 +21,6 @@
 
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonProperty;
-import com.google.common.net.HostAndPort;
 import org.apache.druid.java.util.common.IAE;
 
 import javax.annotation.Nullable;
@@ -133,12 +132,4 @@ public int hashCode()
   {
     return Objects.hash(host, port, tlsPort);
   }
-
-  public HostAndPort toHostAndPort()
-  {
-    if (tlsPort >= 0) {
-      return HostAndPort.fromParts(host, tlsPort);
-    }
-    return HostAndPort.fromParts(host, port);
-  }
 }
diff --git a/processing/src/main/java/org/apache/druid/indexer/TaskMetricsGetter.java b/processing/src/main/java/org/apache/druid/indexer/TaskMetricsGetter.java
index e51e626fce34..4498a3e56a6e 100644
--- a/processing/src/main/java/org/apache/druid/indexer/TaskMetricsGetter.java
+++ b/processing/src/main/java/org/apache/druid/indexer/TaskMetricsGetter.java
@@ -26,7 +26,10 @@
 
 public interface TaskMetricsGetter
 {
+  @SuppressWarnings("unused")
   List<String> getKeys();
+
+  @SuppressWarnings("unused")
   @Nullable
   Map<String, Number> getTotalMetrics();
 }
diff --git a/processing/src/main/java/org/apache/druid/java/util/common/DefineClassUtils.java b/processing/src/main/java/org/apache/druid/java/util/common/DefineClassUtils.java
index dba354d12b78..604ef987394e 100644
--- a/processing/src/main/java/org/apache/druid/java/util/common/DefineClassUtils.java
+++ b/processing/src/main/java/org/apache/druid/java/util/common/DefineClassUtils.java
@@ -171,11 +171,6 @@ private static MethodHandle defineClassJava8(MethodHandles.Lookup lookup) throws
     return defineClass;
   }
 
-  static int getArrayLength(byte[] bytes)
-  {
-    return bytes.length;
-  }
-
   public static Class defineClass(
       Class<?> targetClass,
       byte[] byteCode,
diff --git a/processing/src/main/java/org/apache/druid/java/util/common/HumanReadableBytesRange.java b/processing/src/main/java/org/apache/druid/java/util/common/HumanReadableBytesRange.java
index 4d7fa37f78fd..644dae797d20 100644
--- a/processing/src/main/java/org/apache/druid/java/util/common/HumanReadableBytesRange.java
+++ b/processing/src/main/java/org/apache/druid/java/util/common/HumanReadableBytesRange.java
@@ -47,6 +47,7 @@
 @Target({ElementType.METHOD, ElementType.FIELD, ElementType.ANNOTATION_TYPE, ElementType.CONSTRUCTOR, ElementType.PARAMETER})
 @Retention(RetentionPolicy.RUNTIME)
 @Documented
+@SuppressWarnings("unused")
 @Constraint(validatedBy = HumanReadableBytesRange.HumanReadableBytesRangeValidator.class)
 public @interface HumanReadableBytesRange
 {
@@ -66,9 +67,11 @@
   //ConstraintValidator requires
   String message() default "value must be in the range of [{min}, {max}]";
 
+
   //ConstraintValidator requires
   Class<? extends Payload>[] payload() default {};
 
+  @SuppressWarnings("unused")
   class HumanReadableBytesRangeValidator implements ConstraintValidator<HumanReadableBytesRange, Object>
   {
     private HumanReadableBytesRange range;
diff --git a/processing/src/main/java/org/apache/druid/java/util/common/Numbers.java b/processing/src/main/java/org/apache/druid/java/util/common/Numbers.java
index d24d9799cca5..06c988e8af5b 100644
--- a/processing/src/main/java/org/apache/druid/java/util/common/Numbers.java
+++ b/processing/src/main/java/org/apache/druid/java/util/common/Numbers.java
@@ -200,21 +200,13 @@ public static Long parseLongObject(@Nullable String val)
       return lobj;
     }
     // try as a double, for "ddd.dd" , Longs.tryParse(..) returns null
-    Double dobj = Doubles.tryParse((String) val);
+    Double dobj = Doubles.tryParse(val);
     if (dobj != null) {
       return dobj.longValue();
     }
     throw new NumberFormatException("Cannot parse string to long");
   }
 
-  public static int toIntExact(long value, String error)
-  {
-    if ((int) value != value) {
-      throw new ArithmeticException(error);
-    }
-    return (int) value;
-  }
-
   private Numbers()
   {
   }
diff --git a/processing/src/main/java/org/apache/druid/java/util/common/StringUtils.java b/processing/src/main/java/org/apache/druid/java/util/common/StringUtils.java
index d13098650193..e86d51b8d965 100644
--- a/processing/src/main/java/org/apache/druid/java/util/common/StringUtils.java
+++ b/processing/src/main/java/org/apache/druid/java/util/common/StringUtils.java
@@ -21,12 +21,10 @@
 
 import com.google.common.base.Strings;
 import it.unimi.dsi.fastutil.bytes.ByteArrayList;
-import it.unimi.dsi.fastutil.bytes.ByteList;
 import org.apache.commons.io.IOUtils;
 
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
-
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.UnsupportedEncodingException;
@@ -268,11 +266,6 @@ public static String fromUtf8(final ByteArrayList buffer)
     return StringUtils.fromUtf8(buffer.elements(), 0, buffer.size());
   }
 
-  public static String fromUtf8(final ByteList buffer)
-  {
-    return StringUtils.fromUtf8(buffer.toByteArray());
-  }
-
   /**
    * If buffer is Decodes a UTF-8 string from the remaining bytes of a buffer.
    * Advances the position of the buffer by {@link ByteBuffer#remaining()}.
diff --git a/processing/src/main/java/org/apache/druid/java/util/common/guava/ParallelMergeCombiningSequence.java b/processing/src/main/java/org/apache/druid/java/util/common/guava/ParallelMergeCombiningSequence.java
index da7904240680..b0b3d1d726e2 100644
--- a/processing/src/main/java/org/apache/druid/java/util/common/guava/ParallelMergeCombiningSequence.java
+++ b/processing/src/main/java/org/apache/druid/java/util/common/guava/ParallelMergeCombiningSequence.java
@@ -93,7 +93,7 @@ public ParallelMergeCombiningSequence(
       BinaryOperator<T> combineFn,
       boolean hasTimeout,
       long timeoutMillis,
-      int queryPriority,
+      @SuppressWarnings("unused") int queryPriority,
       int parallelism,
       int yieldAfter,
       int batchSize,
diff --git a/processing/src/main/java/org/apache/druid/java/util/common/io/Closer.java b/processing/src/main/java/org/apache/druid/java/util/common/io/Closer.java
index c843f29b714e..a366f6c3fa26 100644
--- a/processing/src/main/java/org/apache/druid/java/util/common/io/Closer.java
+++ b/processing/src/main/java/org/apache/druid/java/util/common/io/Closer.java
@@ -130,18 +130,6 @@ public <C extends Closeable> C register(@Nullable C closeable)
     return closeable;
   }
 
-  /**
-   * Registers a list of {@code Closeable} to be closed when this {@code Closer} is
-   * {@linkplain #close closed}.
-   *
-   * @return the supplied list of {@code Closeable}
-   */
-  public <C extends Closeable> Iterable<C> registerAll(Iterable<C> closeables)
-  {
-    closeables.forEach(this::register);
-    return closeables;
-  }
-
   /**
    * Stores the given throwable and rethrows it. It will be rethrown as is if it is an
    * {@code IOException}, {@code RuntimeException} or {@code Error}. Otherwise, it will be rethrown
diff --git a/processing/src/main/java/org/apache/druid/java/util/common/logger/Logger.java b/processing/src/main/java/org/apache/druid/java/util/common/logger/Logger.java
index 8306dcad9e60..07f1cd1fbaa1 100644
--- a/processing/src/main/java/org/apache/druid/java/util/common/logger/Logger.java
+++ b/processing/src/main/java/org/apache/druid/java/util/common/logger/Logger.java
@@ -63,6 +63,7 @@ protected org.slf4j.Logger getSlf4jLogger()
     return log;
   }
 
+  @SuppressWarnings("unused")
   @Override
   public String toString()
   {
diff --git a/processing/src/main/java/org/apache/druid/java/util/emitter/core/EventMap.java b/processing/src/main/java/org/apache/druid/java/util/emitter/core/EventMap.java
index 5cf031b2dc37..50237eb02386 100644
--- a/processing/src/main/java/org/apache/druid/java/util/emitter/core/EventMap.java
+++ b/processing/src/main/java/org/apache/druid/java/util/emitter/core/EventMap.java
@@ -79,15 +79,6 @@ public Builder putNonNull(String key, Object value)
       return this;
     }
 
-    /**
-     * Adds map entry to the map
-     */
-    public Builder put(Map.Entry<String, Object> entry)
-    {
-      map.put(entry.getKey(), entry.getValue());
-      return this;
-    }
-
     /**
      * Adds all key -> value pairs from other map
      */
diff --git a/processing/src/main/java/org/apache/druid/java/util/emitter/factory/HttpEmitterFactory.java b/processing/src/main/java/org/apache/druid/java/util/emitter/factory/HttpEmitterFactory.java
index 53f5b7a9d687..e1811b8c90d2 100644
--- a/processing/src/main/java/org/apache/druid/java/util/emitter/factory/HttpEmitterFactory.java
+++ b/processing/src/main/java/org/apache/druid/java/util/emitter/factory/HttpEmitterFactory.java
@@ -26,9 +26,9 @@
 import org.apache.druid.java.util.emitter.core.HttpPostEmitter;
 import org.asynchttpclient.AsyncHttpClient;
 
+@SuppressWarnings("unused")
 public class HttpEmitterFactory extends HttpEmitterConfig implements EmitterFactory
 {
-
   @Override
   public Emitter makeEmitter(ObjectMapper objectMapper, AsyncHttpClient httpClient, Lifecycle lifecycle)
   {
diff --git a/processing/src/main/java/org/apache/druid/java/util/emitter/factory/LoggingEmitterFactory.java b/processing/src/main/java/org/apache/druid/java/util/emitter/factory/LoggingEmitterFactory.java
index 897787bee939..f5dac9e909ac 100644
--- a/processing/src/main/java/org/apache/druid/java/util/emitter/factory/LoggingEmitterFactory.java
+++ b/processing/src/main/java/org/apache/druid/java/util/emitter/factory/LoggingEmitterFactory.java
@@ -26,12 +26,9 @@
 import org.apache.druid.java.util.emitter.core.LoggingEmitterConfig;
 import org.asynchttpclient.AsyncHttpClient;
 
+@SuppressWarnings("unused")
 public class LoggingEmitterFactory extends LoggingEmitterConfig implements EmitterFactory
 {
-  public LoggingEmitterFactory()
-  {
-  }
-
   @Override
   public Emitter makeEmitter(ObjectMapper objectMapper, AsyncHttpClient httpClient, Lifecycle lifecycle)
   {
diff --git a/processing/src/main/java/org/apache/druid/java/util/emitter/factory/NoopEmitterFactory.java b/processing/src/main/java/org/apache/druid/java/util/emitter/factory/NoopEmitterFactory.java
index db9bf6035097..2067204d6cd9 100644
--- a/processing/src/main/java/org/apache/druid/java/util/emitter/factory/NoopEmitterFactory.java
+++ b/processing/src/main/java/org/apache/druid/java/util/emitter/factory/NoopEmitterFactory.java
@@ -25,6 +25,7 @@
 import org.apache.druid.java.util.emitter.core.NoopEmitter;
 import org.asynchttpclient.AsyncHttpClient;
 
+@SuppressWarnings("unused")
 public class NoopEmitterFactory implements EmitterFactory
 {
   @Override
diff --git a/processing/src/main/java/org/apache/druid/java/util/emitter/factory/ParametrizedUriEmitterFactory.java b/processing/src/main/java/org/apache/druid/java/util/emitter/factory/ParametrizedUriEmitterFactory.java
index 5f5670586eff..9bf8537597bf 100644
--- a/processing/src/main/java/org/apache/druid/java/util/emitter/factory/ParametrizedUriEmitterFactory.java
+++ b/processing/src/main/java/org/apache/druid/java/util/emitter/factory/ParametrizedUriEmitterFactory.java
@@ -26,9 +26,9 @@
 import org.apache.druid.java.util.emitter.core.ParametrizedUriEmitterConfig;
 import org.asynchttpclient.AsyncHttpClient;
 
+@SuppressWarnings("unused")
 public class ParametrizedUriEmitterFactory extends ParametrizedUriEmitterConfig implements EmitterFactory
 {
-
   @Override
   public Emitter makeEmitter(ObjectMapper objectMapper, AsyncHttpClient httpClient, Lifecycle lifecycle)
   {
diff --git a/processing/src/main/java/org/apache/druid/java/util/http/client/HttpClientProxyConfig.java b/processing/src/main/java/org/apache/druid/java/util/http/client/HttpClientProxyConfig.java
index fec5c9e365fc..6a4a6dda8fed 100644
--- a/processing/src/main/java/org/apache/druid/java/util/http/client/HttpClientProxyConfig.java
+++ b/processing/src/main/java/org/apache/druid/java/util/http/client/HttpClientProxyConfig.java
@@ -40,6 +40,7 @@ public class HttpClientProxyConfig
   @JsonProperty("password")
   private String password;
 
+  @SuppressWarnings("unused")
   public HttpClientProxyConfig()
   {
   }
diff --git a/processing/src/main/java/org/apache/druid/java/util/http/client/response/FullResponseHolder.java b/processing/src/main/java/org/apache/druid/java/util/http/client/response/FullResponseHolder.java
index 27c2ed25123f..e7242eb29c79 100644
--- a/processing/src/main/java/org/apache/druid/java/util/http/client/response/FullResponseHolder.java
+++ b/processing/src/main/java/org/apache/druid/java/util/http/client/response/FullResponseHolder.java
@@ -49,5 +49,6 @@ public HttpResponse getResponse()
   /**
    * Get the data.
    */
+  @SuppressWarnings("unused")
   public abstract T getContent();
 }
diff --git a/processing/src/main/java/org/apache/druid/java/util/metrics/AbstractMonitor.java b/processing/src/main/java/org/apache/druid/java/util/metrics/AbstractMonitor.java
index 6e67bc0272e1..3fa5fc5c9c19 100644
--- a/processing/src/main/java/org/apache/druid/java/util/metrics/AbstractMonitor.java
+++ b/processing/src/main/java/org/apache/druid/java/util/metrics/AbstractMonitor.java
@@ -41,6 +41,7 @@ public void stop()
     started = false;
   }
 
+  @SuppressWarnings("unused")
   public boolean isStarted()
   {
     return started;
diff --git a/processing/src/main/java/org/apache/druid/java/util/metrics/PidDiscoverer.java b/processing/src/main/java/org/apache/druid/java/util/metrics/PidDiscoverer.java
index 7a2153105864..4744b4ae5750 100644
--- a/processing/src/main/java/org/apache/druid/java/util/metrics/PidDiscoverer.java
+++ b/processing/src/main/java/org/apache/druid/java/util/metrics/PidDiscoverer.java
@@ -21,5 +21,6 @@
 
 public interface PidDiscoverer
 {
+  @SuppressWarnings("unused")
   long getPid();
 }
diff --git a/processing/src/main/java/org/apache/druid/java/util/metrics/ProcFsReader.java b/processing/src/main/java/org/apache/druid/java/util/metrics/ProcFsReader.java
index 1a1ca08c7c60..e8425448f6ab 100644
--- a/processing/src/main/java/org/apache/druid/java/util/metrics/ProcFsReader.java
+++ b/processing/src/main/java/org/apache/druid/java/util/metrics/ProcFsReader.java
@@ -38,7 +38,6 @@ public class ProcFsReader
   private final File procDir;
 
   private static final Logger LOG = new Logger(ProcFsReader.class);
-  public static final Path DEFAULT_PROC_FS_ROOT = Paths.get("/proc/");
   private static final String BOOT_ID_PATH = "sys/kernel/random/boot_id";
   private static final String CPUINFO_PATH = "cpuinfo";
 
diff --git a/processing/src/main/java/org/apache/druid/math/expr/ExprEval.java b/processing/src/main/java/org/apache/druid/math/expr/ExprEval.java
index dbfc11d3c4ee..f06618a23a5d 100644
--- a/processing/src/main/java/org/apache/druid/math/expr/ExprEval.java
+++ b/processing/src/main/java/org/apache/druid/math/expr/ExprEval.java
@@ -1249,12 +1249,6 @@ public Expr toExpr()
       return new ArrayExpr(arrayType, value);
     }
 
-    @Nullable
-    public Object getIndex(int index)
-    {
-      return value == null ? null : value[index];
-    }
-
     protected boolean isScalar()
     {
       return value != null && value.length == 1;
diff --git a/processing/src/main/java/org/apache/druid/math/expr/vector/BivariateDoubleFunctionVectorValueProcessor.java b/processing/src/main/java/org/apache/druid/math/expr/vector/BivariateDoubleFunctionVectorValueProcessor.java
index 904feb5d7059..f23ee5aa38ff 100644
--- a/processing/src/main/java/org/apache/druid/math/expr/vector/BivariateDoubleFunctionVectorValueProcessor.java
+++ b/processing/src/main/java/org/apache/druid/math/expr/vector/BivariateDoubleFunctionVectorValueProcessor.java
@@ -34,7 +34,6 @@ public abstract class BivariateDoubleFunctionVectorValueProcessor<TLeftInput, TR
 {
   final ExprVectorProcessor<TLeftInput> left;
   final ExprVectorProcessor<TRightInput> right;
-  final int maxVectorSize;
   final boolean[] outNulls;
   final double[] outValues;
 
@@ -46,7 +45,6 @@ protected BivariateDoubleFunctionVectorValueProcessor(
   {
     this.left = left;
     this.right = right;
-    this.maxVectorSize = maxVectorSize;
     this.outValues = new double[maxVectorSize];
     this.outNulls = new boolean[maxVectorSize];
   }
diff --git a/processing/src/main/java/org/apache/druid/math/expr/vector/BivariateFunctionVectorObjectProcessor.java b/processing/src/main/java/org/apache/druid/math/expr/vector/BivariateFunctionVectorObjectProcessor.java
index 2f1279a6d2d5..2f7ae4f079bb 100644
--- a/processing/src/main/java/org/apache/druid/math/expr/vector/BivariateFunctionVectorObjectProcessor.java
+++ b/processing/src/main/java/org/apache/druid/math/expr/vector/BivariateFunctionVectorObjectProcessor.java
@@ -35,20 +35,17 @@ public abstract class BivariateFunctionVectorObjectProcessor<TLeftInput, TRightI
 {
   final ExprVectorProcessor<TLeftInput> left;
   final ExprVectorProcessor<TRightInput> right;
-  final int maxVectorSize;
   final TOutput outValues;
   final boolean sqlCompatible = NullHandling.sqlCompatible();
 
   protected BivariateFunctionVectorObjectProcessor(
       ExprVectorProcessor<TLeftInput> left,
       ExprVectorProcessor<TRightInput> right,
-      int maxVectorSize,
       TOutput outValues
   )
   {
     this.left = left;
     this.right = right;
-    this.maxVectorSize = maxVectorSize;
     this.outValues = outValues;
   }
 
diff --git a/processing/src/main/java/org/apache/druid/math/expr/vector/BivariateLongFunctionVectorValueProcessor.java b/processing/src/main/java/org/apache/druid/math/expr/vector/BivariateLongFunctionVectorValueProcessor.java
index 243b7ae79b5f..fb68317bec27 100644
--- a/processing/src/main/java/org/apache/druid/math/expr/vector/BivariateLongFunctionVectorValueProcessor.java
+++ b/processing/src/main/java/org/apache/druid/math/expr/vector/BivariateLongFunctionVectorValueProcessor.java
@@ -34,7 +34,6 @@ public abstract class BivariateLongFunctionVectorValueProcessor<TLeftInput, TRig
 {
   final ExprVectorProcessor<TLeftInput> left;
   final ExprVectorProcessor<TRightInput> right;
-  final int maxVectorSize;
   final boolean[] outNulls;
   final long[] outValues;
 
@@ -46,7 +45,6 @@ protected BivariateLongFunctionVectorValueProcessor(
   {
     this.left = left;
     this.right = right;
-    this.maxVectorSize = maxVectorSize;
     this.outValues = new long[maxVectorSize];
     this.outNulls = new boolean[maxVectorSize];
   }
diff --git a/processing/src/main/java/org/apache/druid/math/expr/vector/LongOutObjectInFunctionVectorProcessor.java b/processing/src/main/java/org/apache/druid/math/expr/vector/LongOutObjectInFunctionVectorProcessor.java
index 8ae0c4d75198..7847d71ec224 100644
--- a/processing/src/main/java/org/apache/druid/math/expr/vector/LongOutObjectInFunctionVectorProcessor.java
+++ b/processing/src/main/java/org/apache/druid/math/expr/vector/LongOutObjectInFunctionVectorProcessor.java
@@ -27,8 +27,6 @@
 public abstract class LongOutObjectInFunctionVectorProcessor
     extends UnivariateFunctionVectorObjectProcessor<Object[], long[]>
 {
-  final ExpressionType inputType;
-
   public LongOutObjectInFunctionVectorProcessor(
       ExprVectorProcessor<Object[]> processor,
       int maxVectorSize,
@@ -36,7 +34,6 @@ public LongOutObjectInFunctionVectorProcessor(
   )
   {
     super(CastToTypeVectorProcessor.cast(processor, inputType), maxVectorSize, new long[maxVectorSize]);
-    this.inputType = inputType;
   }
 
   @Override
diff --git a/processing/src/main/java/org/apache/druid/math/expr/vector/LongOutObjectsInFunctionVectorProcessor.java b/processing/src/main/java/org/apache/druid/math/expr/vector/LongOutObjectsInFunctionVectorProcessor.java
index 88f2f0ff54b3..de34db9afd48 100644
--- a/processing/src/main/java/org/apache/druid/math/expr/vector/LongOutObjectsInFunctionVectorProcessor.java
+++ b/processing/src/main/java/org/apache/druid/math/expr/vector/LongOutObjectsInFunctionVectorProcessor.java
@@ -38,7 +38,6 @@ protected LongOutObjectsInFunctionVectorProcessor(
     super(
         CastToTypeVectorProcessor.cast(left, inputType),
         CastToTypeVectorProcessor.cast(right, inputType),
-        maxVectorSize,
         new long[maxVectorSize]
     );
     this.outNulls = new boolean[maxVectorSize];
diff --git a/processing/src/main/java/org/apache/druid/math/expr/vector/ObjectOutMultiObjectInVectorProcessor.java b/processing/src/main/java/org/apache/druid/math/expr/vector/ObjectOutMultiObjectInVectorProcessor.java
index 2a58e3ea826f..0d668dc2900a 100644
--- a/processing/src/main/java/org/apache/druid/math/expr/vector/ObjectOutMultiObjectInVectorProcessor.java
+++ b/processing/src/main/java/org/apache/druid/math/expr/vector/ObjectOutMultiObjectInVectorProcessor.java
@@ -28,7 +28,6 @@
 public abstract class ObjectOutMultiObjectInVectorProcessor implements ExprVectorProcessor<Object[]>
 {
   final ExprVectorProcessor<Object[]>[] inputs;
-  final int maxVectorSize;
   final Object[] outValues;
 
   final ExpressionType expressionType;
@@ -40,7 +39,6 @@ protected ObjectOutMultiObjectInVectorProcessor(
   )
   {
     this.inputs = inputs;
-    this.maxVectorSize = maxVectorSize;
     this.outValues = new Object[maxVectorSize];
     this.expressionType = objectType;
   }
diff --git a/processing/src/main/java/org/apache/druid/math/expr/vector/ObjectOutObjectsInFunctionVectorProcessor.java b/processing/src/main/java/org/apache/druid/math/expr/vector/ObjectOutObjectsInFunctionVectorProcessor.java
index 93089f5fc5e4..d64ffa384236 100644
--- a/processing/src/main/java/org/apache/druid/math/expr/vector/ObjectOutObjectsInFunctionVectorProcessor.java
+++ b/processing/src/main/java/org/apache/druid/math/expr/vector/ObjectOutObjectsInFunctionVectorProcessor.java
@@ -38,7 +38,6 @@ protected ObjectOutObjectsInFunctionVectorProcessor(
     super(
         CastToTypeVectorProcessor.cast(left, expressionType),
         CastToTypeVectorProcessor.cast(right, expressionType),
-        maxVectorSize,
         new Object[maxVectorSize]
     );
     this.expressionType = expressionType;
diff --git a/processing/src/main/java/org/apache/druid/math/expr/vector/UnivariateDoubleFunctionVectorValueProcessor.java b/processing/src/main/java/org/apache/druid/math/expr/vector/UnivariateDoubleFunctionVectorValueProcessor.java
index 03f9be1eb9a2..65ad076fea12 100644
--- a/processing/src/main/java/org/apache/druid/math/expr/vector/UnivariateDoubleFunctionVectorValueProcessor.java
+++ b/processing/src/main/java/org/apache/druid/math/expr/vector/UnivariateDoubleFunctionVectorValueProcessor.java
@@ -32,7 +32,6 @@
 public abstract class UnivariateDoubleFunctionVectorValueProcessor<TInput> implements ExprVectorProcessor<double[]>
 {
   final ExprVectorProcessor<TInput> processor;
-  final int maxVectorSize;
   final boolean[] outNulls;
   final double[] outValues;
 
@@ -42,7 +41,6 @@ public UnivariateDoubleFunctionVectorValueProcessor(
   )
   {
     this.processor = processor;
-    this.maxVectorSize = maxVectorSize;
     this.outNulls = new boolean[maxVectorSize];
     this.outValues = new double[maxVectorSize];
   }
diff --git a/processing/src/main/java/org/apache/druid/math/expr/vector/UnivariateFunctionVectorObjectProcessor.java b/processing/src/main/java/org/apache/druid/math/expr/vector/UnivariateFunctionVectorObjectProcessor.java
index 02fa6dd3768c..da9be989cffd 100644
--- a/processing/src/main/java/org/apache/druid/math/expr/vector/UnivariateFunctionVectorObjectProcessor.java
+++ b/processing/src/main/java/org/apache/druid/math/expr/vector/UnivariateFunctionVectorObjectProcessor.java
@@ -28,7 +28,6 @@
 public abstract class UnivariateFunctionVectorObjectProcessor<TInput, TOutput> implements ExprVectorProcessor<TOutput>
 {
   final ExprVectorProcessor<TInput> processor;
-  final int maxVectorSize;
   final boolean[] outNulls;
   final TOutput outValues;
 
@@ -39,7 +38,6 @@ public UnivariateFunctionVectorObjectProcessor(
   )
   {
     this.processor = processor;
-    this.maxVectorSize = maxVectorSize;
     this.outNulls = new boolean[maxVectorSize];
     this.outValues = outValues;
   }
diff --git a/processing/src/main/java/org/apache/druid/math/expr/vector/UnivariateLongFunctionVectorValueProcessor.java b/processing/src/main/java/org/apache/druid/math/expr/vector/UnivariateLongFunctionVectorValueProcessor.java
index 869448945086..d24a5e9f1482 100644
--- a/processing/src/main/java/org/apache/druid/math/expr/vector/UnivariateLongFunctionVectorValueProcessor.java
+++ b/processing/src/main/java/org/apache/druid/math/expr/vector/UnivariateLongFunctionVectorValueProcessor.java
@@ -32,7 +32,6 @@
 public abstract class UnivariateLongFunctionVectorValueProcessor<TInput> implements ExprVectorProcessor<long[]>
 {
   final ExprVectorProcessor<TInput> processor;
-  final int maxVectorSize;
   final boolean[] outNulls;
   final long[] outValues;
 
@@ -42,7 +41,6 @@ public UnivariateLongFunctionVectorValueProcessor(
   )
   {
     this.processor = processor;
-    this.maxVectorSize = maxVectorSize;
     this.outNulls = new boolean[maxVectorSize];
     this.outValues = new long[maxVectorSize];
   }
diff --git a/processing/src/main/java/org/apache/druid/metadata/PasswordProviderRedactionMixIn.java b/processing/src/main/java/org/apache/druid/metadata/PasswordProviderRedactionMixIn.java
index 37a5b9a48f79..5a96decb7981 100644
--- a/processing/src/main/java/org/apache/druid/metadata/PasswordProviderRedactionMixIn.java
+++ b/processing/src/main/java/org/apache/druid/metadata/PasswordProviderRedactionMixIn.java
@@ -28,6 +28,7 @@
  */
 public interface PasswordProviderRedactionMixIn
 {
+  @SuppressWarnings("unused")
   @JsonIgnore
   String getPassword();
 }
diff --git a/processing/src/main/java/org/apache/druid/timeline/SegmentId.java b/processing/src/main/java/org/apache/druid/timeline/SegmentId.java
index 986d9aafe276..99d17c4405aa 100644
--- a/processing/src/main/java/org/apache/druid/timeline/SegmentId.java
+++ b/processing/src/main/java/org/apache/druid/timeline/SegmentId.java
@@ -29,7 +29,6 @@
 import com.google.common.primitives.Ints;
 import org.apache.druid.guice.annotations.PublicApi;
 import org.apache.druid.java.util.common.DateTimes;
-import org.apache.druid.java.util.common.IAE;
 import org.apache.druid.java.util.common.Intervals;
 import org.apache.druid.query.SegmentDescriptor;
 import org.apache.druid.timeline.partition.ShardSpec;
@@ -41,7 +40,6 @@
 import java.util.Collections;
 import java.util.List;
 import java.util.Objects;
-import java.util.function.Function;
 import java.util.regex.Matcher;
 import java.util.stream.IntStream;
 
@@ -233,18 +231,6 @@ static String tryExtractMostProbableDataSource(String segmentId)
     }
   }
 
-  public static Function<String, Interval> makeIntervalExtractor(final String dataSource)
-  {
-    return identifier -> {
-      SegmentId segmentIdentifierParts = tryParse(dataSource, identifier);
-      if (segmentIdentifierParts == null) {
-        throw new IAE("Invalid identifier [%s]", identifier);
-      }
-
-      return segmentIdentifierParts.getInterval();
-    };
-  }
-
   /**
    * Creates a dummy SegmentId with the given data source. This method is useful in benchmark and test code.
    */
diff --git a/processing/src/main/java/org/apache/druid/timeline/partition/BuildingSingleDimensionShardSpec.java b/processing/src/main/java/org/apache/druid/timeline/partition/BuildingSingleDimensionShardSpec.java
index ff7d5b9ba804..8bc12de40f37 100644
--- a/processing/src/main/java/org/apache/druid/timeline/partition/BuildingSingleDimensionShardSpec.java
+++ b/processing/src/main/java/org/apache/druid/timeline/partition/BuildingSingleDimensionShardSpec.java
@@ -79,17 +79,20 @@ public Map<String, Object> getSerializableObject()
     return jsonMap;
   }
 
+  @SuppressWarnings("unused")
   public String getDimension()
   {
     return dimension;
   }
 
+  @SuppressWarnings("unused")
   @Nullable
   public String getStart()
   {
     return start;
   }
 
+  @SuppressWarnings("unused")
   @Nullable
   public String getEnd()
   {
diff --git a/processing/src/main/java/org/apache/druid/timeline/partition/SingleDimensionShardSpec.java b/processing/src/main/java/org/apache/druid/timeline/partition/SingleDimensionShardSpec.java
index a8ebbe8dfc86..59ef1be3d6ac 100644
--- a/processing/src/main/java/org/apache/druid/timeline/partition/SingleDimensionShardSpec.java
+++ b/processing/src/main/java/org/apache/druid/timeline/partition/SingleDimensionShardSpec.java
@@ -93,6 +93,7 @@ public Map<String, Object> getSerializableObject()
     return jsonMap;
   }
 
+  @SuppressWarnings("unused")
   public String getDimension()
   {
     return dimension;
diff --git a/processing/src/main/java/org/apache/druid/utils/CircularBuffer.java b/processing/src/main/java/org/apache/druid/utils/CircularBuffer.java
index b61149a01229..ba1299ade88f 100644
--- a/processing/src/main/java/org/apache/druid/utils/CircularBuffer.java
+++ b/processing/src/main/java/org/apache/druid/utils/CircularBuffer.java
@@ -28,6 +28,7 @@
  */
 public class CircularBuffer<E>
 {
+  @SuppressWarnings("unused")
   public E[] getBuffer()
   {
     return buffer;
diff --git a/processing/src/main/java/org/apache/druid/utils/Runnables.java b/processing/src/main/java/org/apache/druid/utils/Runnables.java
index 8cb57df631a8..a4bf36fc910c 100644
--- a/processing/src/main/java/org/apache/druid/utils/Runnables.java
+++ b/processing/src/main/java/org/apache/druid/utils/Runnables.java
@@ -26,6 +26,7 @@
 @PublicApi
 public class Runnables
 {
+  @SuppressWarnings("unused")
   public static Runnable getNoopRunnable()
   {
     return () -> {};