class overrides equals() and should therefore also override hashCode() (#1882)

dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/utils/ZooKeeperState.java

@@ -145,7 +145,7 @@ public class ZooKeeperState {
 		sendThread.setName("FourLetterCmd:" + cmd);
 		sendThread.start();
 		try {
-			sendThread.join(waitTimeout * 1000);
+			sendThread.join(waitTimeout * 1000L);
 			return sendThread.ret;
 		} catch (InterruptedException e) {
 			logger.error("send " + cmd + " to server " + host + ":" + port + " failed!", e);

dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/model/DateInterval.java

@@ -17,6 +17,7 @@
 package org.apache.dolphinscheduler.common.model;
 
 import java.util.Date;
+import java.util.Objects;
 
 /**
  * date interval class
@@ -62,4 +63,8 @@ public class DateInterval {
         this.endTime = endTime;
     }
 
+    @Override
+    public int hashCode() {
+        return Objects.hash(startTime, endTime);
+    }
 }

dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/model/TaskNodeRelation.java

@@ -16,6 +16,8 @@
  */
 package org.apache.dolphinscheduler.common.model;
 
+import java.util.Objects;
+
 public class TaskNodeRelation {
 
   /**
@@ -69,4 +71,9 @@ public class TaskNodeRelation {
             ", endNode='" + endNode + '\'' +
             '}';
   }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(startNode, endNode);
+  }
 }

dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/master/runner/MasterTaskExecThread.java

@@ -122,7 +122,7 @@ public class MasterTaskExecThread extends MasterBaseTaskExecThread {
                     break;
                 }
                 if(checkTimeout){
-                    long remainTime = getRemaintime(taskTimeoutParameter.getInterval()*60);
+                    long remainTime = getRemaintime(taskTimeoutParameter.getInterval() * 60L);
                     if (remainTime < 0) {
                         logger.warn("task id: {} execution time out",taskInstance.getId());
                         // process define