bug #I5G9L0 在相同组件执行完之后，取steps的时候，存在报错现象

liteflow-core/src/main/java/com/yomahub/liteflow/flow/LiteflowResponse.java

@@ -4,8 +4,10 @@ import com.yomahub.liteflow.flow.entity.CmpStep;
 import com.yomahub.liteflow.slot.Slot;
 
 import java.io.Serializable;
+import java.util.HashMap;
 import java.util.Map;
 import java.util.Queue;
+import java.util.function.Consumer;
 import java.util.function.Function;
 import java.util.stream.Collectors;
 
@@ -75,7 +77,13 @@ public class LiteflowResponse implements Serializable {
     }
 
     public Map<String, CmpStep> getExecuteSteps(){
-        return this.getSlot().getExecuteSteps().stream().collect(Collectors.toMap(CmpStep::getNodeId, cmpStep -> cmpStep));
+        Map<String, CmpStep> map = new HashMap<>();
+        this.getSlot().getExecuteSteps().forEach(cmpStep -> map.put(cmpStep.getNodeId(), cmpStep));
+        return map;
+    }
+
+    public Queue<CmpStep> getExecuteStepQueue(){
+        return this.getSlot().getExecuteSteps();
     }
 
     public String getExecuteStepStr(){

liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/java/com/yomahub/liteflow/test/cmpStep/CmpStepELSpringbootTest.java

@@ -2,6 +2,7 @@ package com.yomahub.liteflow.test.cmpStep;
 
 import com.yomahub.liteflow.core.FlowExecutor;
 import com.yomahub.liteflow.flow.LiteflowResponse;
+import com.yomahub.liteflow.flow.entity.CmpStep;
 import com.yomahub.liteflow.test.BaseTest;
 import org.junit.Assert;
 import org.junit.Test;
@@ -13,6 +14,8 @@ import org.springframework.test.context.TestPropertySource;
 import org.springframework.test.context.junit4.SpringRunner;
 
 import javax.annotation.Resource;
+import java.util.Map;
+import java.util.Queue;
 
 /**
  * springboot环境step的测试例子
@@ -51,4 +54,14 @@ public class CmpStepELSpringbootTest extends BaseTest {
         Assert.assertEquals("a==>b", response.getExecuteStepStrWithoutTime());
     }
 
+    @Test
+    public void testStep3() throws Exception{
+        LiteflowResponse response = flowExecutor.execute2Resp("chain3", "arg");
+        Assert.assertTrue(response.isSuccess());
+        Map<String, CmpStep> stepMap = response.getExecuteSteps();
+        Assert.assertEquals(2, stepMap.size());
+        Queue<CmpStep> queue = response.getExecuteStepQueue();
+        Assert.assertEquals(5, queue.size());
+    }
+
 }

liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/resources/cmpStep/flow.el.xml

@@ -7,4 +7,8 @@
     <chain name="chain2">
         THEN(WHEN(e, a).any(true), b)
     </chain>
+
+    <chain name="chain3">
+        THEN(a, b, a, a, b)
+    </chain>
 </flow>