diff --git a/indexing-service/src/main/java/io/druid/indexing/common/task/AbstractFixedIntervalTask.java b/indexing-service/src/main/java/io/druid/indexing/common/task/AbstractFixedIntervalTask.java
index 4e2f08a992d..d1d494f5c83 100644
--- a/indexing-service/src/main/java/io/druid/indexing/common/task/AbstractFixedIntervalTask.java
+++ b/indexing-service/src/main/java/io/druid/indexing/common/task/AbstractFixedIntervalTask.java
@@ -28,7 +28,7 @@ import org.joda.time.Interval;
 public abstract class AbstractFixedIntervalTask extends AbstractTask
 {
   @JsonIgnore
-  final Interval interval;
+  private final Interval interval;
 
   protected AbstractFixedIntervalTask(
       String id,
diff --git a/indexing-service/src/main/java/io/druid/indexing/common/task/DeleteTask.java b/indexing-service/src/main/java/io/druid/indexing/common/task/DeleteTask.java
index 8f5a0da8f46..872ac3507bd 100644
--- a/indexing-service/src/main/java/io/druid/indexing/common/task/DeleteTask.java
+++ b/indexing-service/src/main/java/io/druid/indexing/common/task/DeleteTask.java
@@ -30,9 +30,7 @@ import io.druid.granularity.QueryGranularity;
 import io.druid.indexing.common.TaskLock;
 import io.druid.indexing.common.TaskStatus;
 import io.druid.indexing.common.TaskToolbox;
-import io.druid.indexing.common.actions.LockTryAcquireAction;
 import io.druid.indexing.common.actions.SegmentInsertAction;
-import io.druid.indexing.common.actions.TaskActionClient;
 import io.druid.query.aggregation.AggregatorFactory;
 import io.druid.segment.IndexMerger;
 import io.druid.segment.IndexableAdapter;
@@ -81,13 +79,13 @@ public class DeleteTask extends AbstractFixedIntervalTask
     // Strategy: Create an empty segment covering the interval to be deleted
     final TaskLock myLock = Iterables.getOnlyElement(getTaskLocks(toolbox));
     final IncrementalIndex empty = new IncrementalIndex(0, QueryGranularity.NONE, new AggregatorFactory[0]);
-    final IndexableAdapter emptyAdapter = new IncrementalIndexAdapter(interval, empty);
+    final IndexableAdapter emptyAdapter = new IncrementalIndexAdapter(getInterval(), empty);
 
     // Create DataSegment
     final DataSegment segment =
         DataSegment.builder()
                    .dataSource(this.getDataSource())
-                   .interval(interval)
+                   .interval(getInterval())
                    .version(myLock.getVersion())
                    .shardSpec(new NoneShardSpec())
                    .build();
diff --git a/indexing-service/src/main/java/io/druid/indexing/common/task/IndexTask.java b/indexing-service/src/main/java/io/druid/indexing/common/task/IndexTask.java
index a92f893ccd6..468ff68bb0a 100644
--- a/indexing-service/src/main/java/io/druid/indexing/common/task/IndexTask.java
+++ b/indexing-service/src/main/java/io/druid/indexing/common/task/IndexTask.java
@@ -160,7 +160,7 @@ public class IndexTask extends AbstractFixedIntervalTask
                 indexGranularity,
                 shardSpec
             ),
-            interval,
+            getInterval(),
             myLock.getVersion()
         );
         segments.add(segment);
diff --git a/indexing-service/src/main/java/io/druid/indexing/common/task/KillTask.java b/indexing-service/src/main/java/io/druid/indexing/common/task/KillTask.java
index ef266b65f21..c77ddb21d96 100644
--- a/indexing-service/src/main/java/io/druid/indexing/common/task/KillTask.java
+++ b/indexing-service/src/main/java/io/druid/indexing/common/task/KillTask.java
@@ -28,10 +28,8 @@ import com.metamx.common.logger.Logger;
 import io.druid.indexing.common.TaskLock;
 import io.druid.indexing.common.TaskStatus;
 import io.druid.indexing.common.TaskToolbox;
-import io.druid.indexing.common.actions.LockTryAcquireAction;
 import io.druid.indexing.common.actions.SegmentListUnusedAction;
 import io.druid.indexing.common.actions.SegmentNukeAction;
-import io.druid.indexing.common.actions.TaskActionClient;
 import io.druid.timeline.DataSegment;
 import org.joda.time.Interval;
 
@@ -63,12 +61,6 @@ public class KillTask extends AbstractFixedIntervalTask
     return "kill";
   }
 
-  @Override
-  public boolean isReady(TaskActionClient taskActionClient) throws Exception
-  {
-    return taskActionClient.submit(new LockTryAcquireAction(interval)).isPresent();
-  }
-
   @Override
   public TaskStatus run(TaskToolbox toolbox) throws Exception
   {
@@ -79,8 +71,8 @@ public class KillTask extends AbstractFixedIntervalTask
       throw new ISE("WTF?! Lock dataSource[%s] != task dataSource[%s]", myLock.getDataSource(), getDataSource());
     }
 
-    if (!myLock.getInterval().equals(interval)) {
-      throw new ISE("WTF?! Lock interval[%s] != task interval[%s]", myLock.getInterval(), interval);
+    if (!myLock.getInterval().equals(getInterval())) {
+      throw new ISE("WTF?! Lock interval[%s] != task interval[%s]", myLock.getInterval(), getInterval());
     }
 
     // List unused segments
diff --git a/indexing-service/src/main/java/io/druid/indexing/common/task/MergeTaskBase.java b/indexing-service/src/main/java/io/druid/indexing/common/task/MergeTaskBase.java
index 4f43afccc65..d49d74b355b 100644
--- a/indexing-service/src/main/java/io/druid/indexing/common/task/MergeTaskBase.java
+++ b/indexing-service/src/main/java/io/druid/indexing/common/task/MergeTaskBase.java
@@ -40,7 +40,6 @@ import com.metamx.emitter.service.ServiceMetricEvent;
 import io.druid.indexing.common.TaskLock;
 import io.druid.indexing.common.TaskStatus;
 import io.druid.indexing.common.TaskToolbox;
-import io.druid.indexing.common.actions.LockTryAcquireAction;
 import io.druid.indexing.common.actions.SegmentInsertAction;
 import io.druid.indexing.common.actions.SegmentListUsedAction;
 import io.druid.indexing.common.actions.TaskActionClient;
@@ -52,7 +51,6 @@ import org.joda.time.Interval;
 
 import javax.annotation.Nullable;
 import java.io.File;
-import java.io.IOException;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -202,7 +200,7 @@ public abstract class MergeTaskBase extends AbstractFixedIntervalTask
 
       final Set<String> current = ImmutableSet.copyOf(
           Iterables.transform(
-              taskActionClient.submit(new SegmentListUsedAction(getDataSource(), interval)),
+              taskActionClient.submit(new SegmentListUsedAction(getDataSource(), getInterval())),
               toIdentifier
           )
       );
@@ -243,7 +241,7 @@ public abstract class MergeTaskBase extends AbstractFixedIntervalTask
     return Objects.toStringHelper(this)
                   .add("id", getId())
                   .add("dataSource", getDataSource())
-                  .add("interval", interval)
+                  .add("interval", getInterval())
                   .add("segments", segments)
                   .toString();
   }
diff --git a/indexing-service/src/main/java/io/druid/indexing/common/task/VersionConverterTask.java b/indexing-service/src/main/java/io/druid/indexing/common/task/VersionConverterTask.java
index 0d9dfc8f7ec..52807861a12 100644
--- a/indexing-service/src/main/java/io/druid/indexing/common/task/VersionConverterTask.java
+++ b/indexing-service/src/main/java/io/druid/indexing/common/task/VersionConverterTask.java
@@ -29,7 +29,6 @@ import com.metamx.common.guava.FunctionalIterable;
 import com.metamx.common.logger.Logger;
 import io.druid.indexing.common.TaskStatus;
 import io.druid.indexing.common.TaskToolbox;
-import io.druid.indexing.common.actions.LockTryAcquireAction;
 import io.druid.indexing.common.actions.SegmentInsertAction;
 import io.druid.indexing.common.actions.SegmentListUsedAction;
 import io.druid.indexing.common.actions.TaskActionClient;
@@ -221,12 +220,6 @@ public class VersionConverterTask extends AbstractFixedIntervalTask
       return "version_converter_sub";
     }
 
-    @Override
-    public boolean isReady(TaskActionClient taskActionClient) throws Exception
-    {
-      return taskActionClient.submit(new LockTryAcquireAction(segment.getInterval())).isPresent();
-    }
-
     @Override
     public TaskStatus run(TaskToolbox toolbox) throws Exception
     {