fix

Author: shuwenwei

iotdb-core/calc-commons/src/main/java/org/apache/iotdb/calc/execution/schedule/queue/IDIndexedAccessible.java

@@ -19,8 +19,6 @@
 
 package org.apache.iotdb.calc.execution.schedule.queue;
 
-import org.apache.iotdb.db.queryengine.execution.schedule.queue.IndexedBlockingQueue;
-
 /**
  * A simple interface for id getter and setter.
  *

iotdb-core/calc-commons/src/main/java/org/apache/iotdb/calc/execution/schedule/queue/IndexedBlockingQueue.java

@@ -166,7 +166,7 @@ public final synchronized int size() {
    *
    * @return true if the queue is empty, otherwise false.
    */
-  protected abstract boolean isEmpty();
+  public abstract boolean isEmpty();
 
   /**
    * Get and remove the first element.

iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/execution/schedule/queue/L1PriorityQueue.java

@@ -62,7 +62,7 @@ public L1PriorityQueue(int maxCapacity, Comparator<E> comparator, E queryHolder)
   }
 
   @Override
-  protected boolean isEmpty() {
+  public boolean isEmpty() {
     return keyedElements.isEmpty();
   }
 

iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/execution/schedule/queue/L2PriorityQueue.java

@@ -70,7 +70,7 @@ public L2PriorityQueue(int maxCapacity, Comparator<E> comparator, E queryHolder)
   }
 
   @Override
-  protected boolean isEmpty() {
+  public boolean isEmpty() {
     return workingKeyedElements.isEmpty() && idleKeyedElements.isEmpty();
   }
 

iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/execution/schedule/queue/multilevelqueue/MultilevelPriorityQueue.java

@@ -158,7 +158,7 @@ protected DriverTask remove(DriverTask driverTask) {
   }
 
   @Override
-  protected boolean isEmpty() {
+  public boolean isEmpty() {
     if (!highestPriorityLevelQueue.isEmpty()) {
       return false;
     }