fix bug: there exists some problems in checking task dependency

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

@@ -18,6 +18,7 @@ package org.apache.dolphinscheduler.server.master.runner;
 
 import com.alibaba.fastjson.JSON;
 import com.google.common.collect.Lists;
+import net.sf.jsqlparser.expression.NextValExpression;
 import org.apache.commons.io.FileUtils;
 import org.apache.dolphinscheduler.common.Constants;
 import org.apache.dolphinscheduler.common.enums.*;
@@ -663,7 +664,6 @@ public class MasterExecThread implements Runnable {
         if(startNodes.contains(taskName)){
             return DependResult.SUCCESS;
         }
-
         TaskNode taskNode = dag.getNode(taskName);
         List<String> depNameList = taskNode.getDepList();
         for(String depsNode : depNameList ){
@@ -672,25 +672,30 @@ public class MasterExecThread implements Runnable {
                     || skipTaskNodeList.containsKey(depsNode)){
                 continue;
             }
-            // dependencies must be fully completed
+            // all the dependencies must be completed
             if(!completeTaskList.containsKey(depsNode)){
                 return DependResult.WAITING;
             }
+            // depend node has already complete.
             ExecutionStatus depTaskState = completeTaskList.get(depsNode).getState();
-            // conditions task would not return failed.
-            if(depTaskState.typeIsFailure()
-                    && !DagHelper.haveConditionsAfterNode(depsNode, dag )
-                    && !dag.getNode(depsNode).isConditionsTask()){
-                return DependResult.FAILED;
-            }
-
             if(depTaskState.typeIsPause() || depTaskState.typeIsCancel()){
                 return DependResult.WAITING;
             }
+            // ignore task state if current task is condition
+            if(taskNode.isConditionsTask()){
+                continue;
+            }
+            if(dag.getNode(depsNode).isConditionsTask()){
+                //condition task need check the branch to run
+                List<String> nextTaskList = parseConditionTask(depsNode);
+                if(!nextTaskList.contains(taskName)){
+                    return DependResult.FAILED;
+                }
+            }else if(depTaskState.typeIsFailure()){
+                return DependResult.FAILED;
+            }
         }
-
         logger.info("taskName: {} completeDependTaskList: {}", taskName, Arrays.toString(completeTaskList.keySet().toArray()));
-
         return DependResult.SUCCESS;
     }