diff --git a/codestyle/spotbugs-exclude.xml b/codestyle/spotbugs-exclude.xml
index fe8a6dee64fd..3ee23309bcf4 100644
--- a/codestyle/spotbugs-exclude.xml
+++ b/codestyle/spotbugs-exclude.xml
@@ -83,7 +83,6 @@
     <Bug pattern="SF_SWITCH_FALLTHROUGH"/>
     <Bug pattern="SF_SWITCH_NO_DEFAULT"/>
     <Bug pattern="SR_NOT_CHECKED"/>
-    <Bug pattern="SS_SHOULD_BE_STATIC"/>
     <Bug pattern="SWL_SLEEP_WITH_LOCK_HELD"/>
     <Bug pattern="UL_UNRELEASED_LOCK_EXCEPTION_PATH"/>
     <Bug pattern="URF_UNREAD_FIELD"/>
diff --git a/indexing-service/src/main/java/org/apache/druid/indexing/worker/config/WorkerConfig.java b/indexing-service/src/main/java/org/apache/druid/indexing/worker/config/WorkerConfig.java
index 65d09e7521bb..4bfa6ee9521c 100644
--- a/indexing-service/src/main/java/org/apache/druid/indexing/worker/config/WorkerConfig.java
+++ b/indexing-service/src/main/java/org/apache/druid/indexing/worker/config/WorkerConfig.java
@@ -25,32 +25,29 @@
 import org.joda.time.Period;
 
 import javax.validation.constraints.Min;
-import javax.validation.constraints.NotNull;
 
 /**
  */
 public class WorkerConfig
 {
   @JsonProperty
-  @NotNull
-  private final String ip = DruidNode.getDefaultHost();
+  private String ip = DruidNode.getDefaultHost();
 
   @JsonProperty
-  @NotNull
-  private final String version = "0";
+  private String version = "0";
 
   @JsonProperty
   @Min(1)
-  private final int capacity = Math.max(1, JvmUtils.getRuntimeInfo().getAvailableProcessors() - 1);
+  private int capacity = Math.max(1, JvmUtils.getRuntimeInfo().getAvailableProcessors() - 1);
 
   @JsonProperty
-  private final long intermediaryPartitionDiscoveryPeriodSec = 60L;
+  private long intermediaryPartitionDiscoveryPeriodSec = 60L;
 
   @JsonProperty
-  private final long intermediaryPartitionCleanupPeriodSec = 300L;
+  private long intermediaryPartitionCleanupPeriodSec = 300L;
 
   @JsonProperty
-  private final Period intermediaryPartitionTimeout = new Period("P1D");
+  private Period intermediaryPartitionTimeout = new Period("P1D");
 
   public String getIp()
   {
diff --git a/server/src/main/java/org/apache/druid/server/security/AnonymousAuthenticator.java b/server/src/main/java/org/apache/druid/server/security/AnonymousAuthenticator.java
index 7cfe76c52047..a11018964a95 100644
--- a/server/src/main/java/org/apache/druid/server/security/AnonymousAuthenticator.java
+++ b/server/src/main/java/org/apache/druid/server/security/AnonymousAuthenticator.java
@@ -40,8 +40,8 @@
 @JsonTypeName("anonymous")
 public class AnonymousAuthenticator implements Authenticator
 {
+  private static final String DEFAULT_IDENTITY = "defaultUser";
   private final AuthenticationResult anonymousResult;
-  private final String DEFAULT_IDENTITY = "defaultUser";
 
   @JsonCreator
   public AnonymousAuthenticator(