diff --git a/liteflow-core/src/main/java/com/yomahub/liteflow/core/NodeComponent.java b/liteflow-core/src/main/java/com/yomahub/liteflow/core/NodeComponent.java
index d965c1167..c760054e0 100644
--- a/liteflow-core/src/main/java/com/yomahub/liteflow/core/NodeComponent.java
+++ b/liteflow-core/src/main/java/com/yomahub/liteflow/core/NodeComponent.java
@@ -76,6 +76,7 @@ public abstract class NodeComponent{
 
 		//在元数据里加入step信息
 		CmpStep cmpStep = new CmpStep(nodeId, name, CmpStepTypeEnum.SINGLE);
+		cmpStep.setTag(tagTL.get());
 		slot.addStep(cmpStep);
 
 		StopWatch stopWatch = new StopWatch();
diff --git a/liteflow-core/src/main/java/com/yomahub/liteflow/flow/entity/CmpStep.java b/liteflow-core/src/main/java/com/yomahub/liteflow/flow/entity/CmpStep.java
index 87211979a..9173bb8b4 100644
--- a/liteflow-core/src/main/java/com/yomahub/liteflow/flow/entity/CmpStep.java
+++ b/liteflow-core/src/main/java/com/yomahub/liteflow/flow/entity/CmpStep.java
@@ -22,6 +22,8 @@ public class CmpStep {
 
     private String nodeName;
 
+    private String tag;
+
     private CmpStepTypeEnum stepType;
 
     //消耗的时间，毫秒为单位
@@ -138,4 +140,12 @@ public class CmpStep {
             }
         }
     }
+
+    public String getTag() {
+        return tag;
+    }
+
+    public void setTag(String tag) {
+        this.tag = tag;
+    }
 }
diff --git a/liteflow-core/src/main/java/com/yomahub/liteflow/util/LOGOPrinter.java b/liteflow-core/src/main/java/com/yomahub/liteflow/util/LOGOPrinter.java
index 97ec983c8..6b023567a 100644
--- a/liteflow-core/src/main/java/com/yomahub/liteflow/util/LOGOPrinter.java
+++ b/liteflow-core/src/main/java/com/yomahub/liteflow/util/LOGOPrinter.java
@@ -13,7 +13,7 @@ public class LOGOPrinter {
 	/**
 	 * LiteFlow 当前版本号
 	 */
-	private static final String VERSION_NO = "v2.8.1";
+	private static final String VERSION_NO = "v2.8.2";
 
 	public static void print() {
 		StringBuilder str = new StringBuilder("\n");
diff --git a/liteflow-testcase-el/liteflow-testcase-el-declare-springboot/src/test/java/com/yomahub/liteflow/test/BaseTest.java b/liteflow-testcase-el/liteflow-testcase-el-declare-springboot/src/test/java/com/yomahub/liteflow/test/BaseTest.java
index 9f5684c5a..3a79ad7b0 100644
--- a/liteflow-testcase-el/liteflow-testcase-el-declare-springboot/src/test/java/com/yomahub/liteflow/test/BaseTest.java
+++ b/liteflow-testcase-el/liteflow-testcase-el-declare-springboot/src/test/java/com/yomahub/liteflow/test/BaseTest.java
@@ -1,7 +1,6 @@
 package com.yomahub.liteflow.test;
 
 import com.yomahub.liteflow.flow.FlowBus;
-import com.yomahub.liteflow.flow.id.IdGeneratorHolder;
 import com.yomahub.liteflow.property.LiteflowConfigGetter;
 import com.yomahub.liteflow.spi.holder.SpiFactoryCleaner;
 import com.yomahub.liteflow.spring.ComponentScanner;
diff --git a/liteflow-testcase-el/liteflow-testcase-el-declare-springboot/src/test/java/com/yomahub/liteflow/test/cmpStep/CmpStepELDeclSpringbootTest.java b/liteflow-testcase-el/liteflow-testcase-el-declare-springboot/src/test/java/com/yomahub/liteflow/test/cmpStep/CmpStepELDeclSpringbootTest.java
index 2158c1cf0..d07e71009 100644
--- a/liteflow-testcase-el/liteflow-testcase-el-declare-springboot/src/test/java/com/yomahub/liteflow/test/cmpStep/CmpStepELDeclSpringbootTest.java
+++ b/liteflow-testcase-el/liteflow-testcase-el-declare-springboot/src/test/java/com/yomahub/liteflow/test/cmpStep/CmpStepELDeclSpringbootTest.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 +14,10 @@ import org.springframework.test.context.TestPropertySource;
 import org.springframework.test.context.junit4.SpringRunner;
 
 import javax.annotation.Resource;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Queue;
+import java.util.Set;
 
 /**
  * springboot环境最普通的例子测试
@@ -48,4 +53,22 @@ public class CmpStepELDeclSpringbootTest extends BaseTest {
         Assert.assertTrue(response.isSuccess());
         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());
+
+        Set<String> tagSet = new HashSet<>();
+        response.getExecuteStepQueue().stream().filter(
+                cmpStep -> cmpStep.getNodeId().equals("a")
+        ).forEach(cmpStep -> tagSet.add(cmpStep.getTag()));
+
+        Assert.assertEquals(3, tagSet.size());
+
+    }
 }
diff --git a/liteflow-testcase-el/liteflow-testcase-el-declare-springboot/src/test/resources/cmpStep/flow.el.xml b/liteflow-testcase-el/liteflow-testcase-el-declare-springboot/src/test/resources/cmpStep/flow.el.xml
index c70aa571c..e4a1e577a 100644
--- a/liteflow-testcase-el/liteflow-testcase-el-declare-springboot/src/test/resources/cmpStep/flow.el.xml
+++ b/liteflow-testcase-el/liteflow-testcase-el-declare-springboot/src/test/resources/cmpStep/flow.el.xml
@@ -1,10 +1,14 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <flow>
     <chain name="chain1">
-        THEN(a, b, WHEN(c, d));
+        THEN(a.tag("A"), b.tag("B"), WHEN(c.tag("C"), d.tag("D")));
     </chain>
 
     <chain name="chain2">
         THEN(WHEN(e, a).any(true), b);
     </chain>
+
+    <chain name="chain3">
+        THEN(a.tag("a1"), b, a.tag("a2"), a.tag("a3"), b);
+    </chain>
 </flow>
\ No newline at end of file
diff --git a/liteflow-testcase-el/liteflow-testcase-el-nospring/src/test/java/com/yomahub/liteflow/test/BaseTest.java b/liteflow-testcase-el/liteflow-testcase-el-nospring/src/test/java/com/yomahub/liteflow/test/BaseTest.java
index 406a91d4c..2dc0c9b8e 100644
--- a/liteflow-testcase-el/liteflow-testcase-el-nospring/src/test/java/com/yomahub/liteflow/test/BaseTest.java
+++ b/liteflow-testcase-el/liteflow-testcase-el-nospring/src/test/java/com/yomahub/liteflow/test/BaseTest.java
@@ -2,7 +2,6 @@ package com.yomahub.liteflow.test;
 
 import com.yomahub.liteflow.core.FlowExecutorHolder;
 import com.yomahub.liteflow.flow.FlowBus;
-import com.yomahub.liteflow.flow.id.IdGeneratorHolder;
 import com.yomahub.liteflow.property.LiteflowConfigGetter;
 import com.yomahub.liteflow.spi.holder.SpiFactoryCleaner;
 import com.yomahub.liteflow.thread.ExecutorHelper;
diff --git a/liteflow-testcase-el/liteflow-testcase-el-nospring/src/test/java/com/yomahub/liteflow/test/cmpStep/CmpStepTest.java b/liteflow-testcase-el/liteflow-testcase-el-nospring/src/test/java/com/yomahub/liteflow/test/cmpStep/CmpStepTest.java
index 470196c71..e4b253fb7 100644
--- a/liteflow-testcase-el/liteflow-testcase-el-nospring/src/test/java/com/yomahub/liteflow/test/cmpStep/CmpStepTest.java
+++ b/liteflow-testcase-el/liteflow-testcase-el-nospring/src/test/java/com/yomahub/liteflow/test/cmpStep/CmpStepTest.java
@@ -3,12 +3,18 @@ package com.yomahub.liteflow.test.cmpStep;
 import com.yomahub.liteflow.core.FlowExecutor;
 import com.yomahub.liteflow.core.FlowExecutorHolder;
 import com.yomahub.liteflow.flow.LiteflowResponse;
+import com.yomahub.liteflow.flow.entity.CmpStep;
 import com.yomahub.liteflow.property.LiteflowConfig;
 import com.yomahub.liteflow.test.BaseTest;
 import org.junit.Assert;
 import org.junit.BeforeClass;
 import org.junit.Test;
 
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Queue;
+import java.util.Set;
+
 public class CmpStepTest extends BaseTest{
 
     private static FlowExecutor flowExecutor;
@@ -39,4 +45,22 @@ public class CmpStepTest extends BaseTest{
         Assert.assertTrue(response.isSuccess());
         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());
+
+        Set<String> tagSet = new HashSet<>();
+        response.getExecuteStepQueue().stream().filter(
+                cmpStep -> cmpStep.getNodeId().equals("a")
+        ).forEach(cmpStep -> tagSet.add(cmpStep.getTag()));
+
+        Assert.assertEquals(3, tagSet.size());
+
+    }
 }
diff --git a/liteflow-testcase-el/liteflow-testcase-el-nospring/src/test/resources/cmpStep/flow.el.xml b/liteflow-testcase-el/liteflow-testcase-el-nospring/src/test/resources/cmpStep/flow.el.xml
index cbf8a548f..ce12f9808 100644
--- a/liteflow-testcase-el/liteflow-testcase-el-nospring/src/test/resources/cmpStep/flow.el.xml
+++ b/liteflow-testcase-el/liteflow-testcase-el-nospring/src/test/resources/cmpStep/flow.el.xml
@@ -9,10 +9,14 @@
     </nodes>
 
     <chain name="chain1">
-        THEN(a, b, WHEN(c, d));
+        THEN(a.tag("A"), b.tag("B"), WHEN(c.tag("C"), d.tag("D")));
     </chain>
 
     <chain name="chain2">
         THEN(WHEN(e, a).any(true), b);
     </chain>
+
+    <chain name="chain3">
+        THEN(a.tag("a1"), b, a.tag("a2"), a.tag("a3"), b);
+    </chain>
 </flow>
\ No newline at end of file
diff --git a/liteflow-testcase-el/liteflow-testcase-el-script-groovy-springboot/src/test/java/com/yomahub/liteflow/test/BaseTest.java b/liteflow-testcase-el/liteflow-testcase-el-script-groovy-springboot/src/test/java/com/yomahub/liteflow/test/BaseTest.java
index 0924ff42c..64886670f 100644
--- a/liteflow-testcase-el/liteflow-testcase-el-script-groovy-springboot/src/test/java/com/yomahub/liteflow/test/BaseTest.java
+++ b/liteflow-testcase-el/liteflow-testcase-el-script-groovy-springboot/src/test/java/com/yomahub/liteflow/test/BaseTest.java
@@ -1,7 +1,6 @@
 package com.yomahub.liteflow.test;
 
 import com.yomahub.liteflow.flow.FlowBus;
-import com.yomahub.liteflow.flow.id.IdGeneratorHolder;
 import com.yomahub.liteflow.property.LiteflowConfigGetter;
 import com.yomahub.liteflow.spi.holder.SpiFactoryCleaner;
 import com.yomahub.liteflow.spring.ComponentScanner;
diff --git a/liteflow-testcase-el/liteflow-testcase-el-script-qlexpress-springboot/src/test/java/com/yomahub/liteflow/test/BaseTest.java b/liteflow-testcase-el/liteflow-testcase-el-script-qlexpress-springboot/src/test/java/com/yomahub/liteflow/test/BaseTest.java
index 0924ff42c..64886670f 100644
--- a/liteflow-testcase-el/liteflow-testcase-el-script-qlexpress-springboot/src/test/java/com/yomahub/liteflow/test/BaseTest.java
+++ b/liteflow-testcase-el/liteflow-testcase-el-script-qlexpress-springboot/src/test/java/com/yomahub/liteflow/test/BaseTest.java
@@ -1,7 +1,6 @@
 package com.yomahub.liteflow.test;
 
 import com.yomahub.liteflow.flow.FlowBus;
-import com.yomahub.liteflow.flow.id.IdGeneratorHolder;
 import com.yomahub.liteflow.property.LiteflowConfigGetter;
 import com.yomahub.liteflow.spi.holder.SpiFactoryCleaner;
 import com.yomahub.liteflow.spring.ComponentScanner;
diff --git a/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/java/com/yomahub/liteflow/test/BaseTest.java b/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/java/com/yomahub/liteflow/test/BaseTest.java
index 0924ff42c..64886670f 100644
--- a/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/java/com/yomahub/liteflow/test/BaseTest.java
+++ b/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/java/com/yomahub/liteflow/test/BaseTest.java
@@ -1,7 +1,6 @@
 package com.yomahub.liteflow.test;
 
 import com.yomahub.liteflow.flow.FlowBus;
-import com.yomahub.liteflow.flow.id.IdGeneratorHolder;
 import com.yomahub.liteflow.property.LiteflowConfigGetter;
 import com.yomahub.liteflow.spi.holder.SpiFactoryCleaner;
 import com.yomahub.liteflow.spring.ComponentScanner;
diff --git a/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/java/com/yomahub/liteflow/test/cmpStep/CmpStepELSpringbootTest.java b/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/java/com/yomahub/liteflow/test/cmpStep/CmpStepELSpringbootTest.java
index 0dbdb8ca5..079f82fff 100644
--- a/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/java/com/yomahub/liteflow/test/cmpStep/CmpStepELSpringbootTest.java
+++ b/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/java/com/yomahub/liteflow/test/cmpStep/CmpStepELSpringbootTest.java
@@ -14,8 +14,12 @@ import org.springframework.test.context.TestPropertySource;
 import org.springframework.test.context.junit4.SpringRunner;
 
 import javax.annotation.Resource;
+import java.util.HashSet;
 import java.util.Map;
 import java.util.Queue;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.function.Predicate;
 
 /**
  * springboot环境step的测试例子
@@ -62,6 +66,14 @@ public class CmpStepELSpringbootTest extends BaseTest {
         Assert.assertEquals(2, stepMap.size());
         Queue<CmpStep> queue = response.getExecuteStepQueue();
         Assert.assertEquals(5, queue.size());
+
+        Set<String> tagSet = new HashSet<>();
+        response.getExecuteStepQueue().stream().filter(
+                cmpStep -> cmpStep.getNodeId().equals("a")
+        ).forEach(cmpStep -> tagSet.add(cmpStep.getTag()));
+
+        Assert.assertEquals(3, tagSet.size());
+
     }
 
 }
diff --git a/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/java/com/yomahub/liteflow/test/switchError/SwitchELSpringbootTest.java b/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/java/com/yomahub/liteflow/test/switchError/SwitchELSpringbootTest.java
new file mode 100644
index 000000000..c4812e85d
--- /dev/null
+++ b/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/java/com/yomahub/liteflow/test/switchError/SwitchELSpringbootTest.java
@@ -0,0 +1,39 @@
+package com.yomahub.liteflow.test.switchError;
+
+import com.yomahub.liteflow.core.FlowExecutor;
+import com.yomahub.liteflow.flow.LiteflowResponse;
+import com.yomahub.liteflow.test.BaseTest;
+import org.junit.Assert;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.test.context.TestPropertySource;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import javax.annotation.Resource;
+
+/**
+ * springboot环境EL常规的例子测试
+ * @author Bryan.Zhang
+ */
+@RunWith(SpringRunner.class)
+@TestPropertySource(value = "classpath:/switchError/application.properties")
+@SpringBootTest(classes = SwitchELSpringbootTest.class)
+@EnableAutoConfiguration
+@ComponentScan({"com.yomahub.liteflow.test.switchError.cmp"})
+public class SwitchELSpringbootTest extends BaseTest {
+
+    @Resource
+    private FlowExecutor flowExecutor;
+
+    //2022-07-12 switch 异常错误.c.y.l.builder.el.operator.ToOperator     : parameter error
+    //run QlExpress Exception at line 1 :
+    // switch().to(): 只有一个node时出错
+    @Test
+    public void testSwitchError() throws Exception{
+        LiteflowResponse response = flowExecutor.execute2Resp("chain1", "arg");
+        Assert.assertTrue(response.isSuccess());
+    }
+}
diff --git a/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/java/com/yomahub/liteflow/test/switchError/cmp/ACmp.java b/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/java/com/yomahub/liteflow/test/switchError/cmp/ACmp.java
new file mode 100644
index 000000000..721f398aa
--- /dev/null
+++ b/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/java/com/yomahub/liteflow/test/switchError/cmp/ACmp.java
@@ -0,0 +1,20 @@
+/**
+ * <p>Title: liteflow</p>
+ * <p>Description: 轻量级的组件式流程框架</p>
+ * @author Bryan.Zhang
+ * @email weenyc31@163.com
+ * @Date 2020/4/1
+ */
+package com.yomahub.liteflow.test.switchError.cmp;
+
+import com.yomahub.liteflow.annotation.LiteflowComponent;
+import com.yomahub.liteflow.core.NodeComponent;
+
+@LiteflowComponent("a")
+public class ACmp extends NodeComponent {
+
+	@Override
+	public void process() {
+		System.out.println("ACmp executed!");
+	}
+}
diff --git a/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/java/com/yomahub/liteflow/test/switchError/cmp/BCmp.java b/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/java/com/yomahub/liteflow/test/switchError/cmp/BCmp.java
new file mode 100644
index 000000000..1cf73df35
--- /dev/null
+++ b/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/java/com/yomahub/liteflow/test/switchError/cmp/BCmp.java
@@ -0,0 +1,21 @@
+/**
+ * <p>Title: liteflow</p>
+ * <p>Description: 轻量级的组件式流程框架</p>
+ * @author Bryan.Zhang
+ * @email weenyc31@163.com
+ * @Date 2020/4/1
+ */
+package com.yomahub.liteflow.test.switchError.cmp;
+
+import com.yomahub.liteflow.annotation.LiteflowComponent;
+import com.yomahub.liteflow.core.NodeComponent;
+
+@LiteflowComponent("b")
+public class BCmp extends NodeComponent {
+
+	@Override
+	public void process() {
+		System.out.println("BCmp executed!");
+	}
+
+}
diff --git a/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/java/com/yomahub/liteflow/test/switchError/cmp/CCmp.java b/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/java/com/yomahub/liteflow/test/switchError/cmp/CCmp.java
new file mode 100644
index 000000000..1523e77c4
--- /dev/null
+++ b/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/java/com/yomahub/liteflow/test/switchError/cmp/CCmp.java
@@ -0,0 +1,21 @@
+/**
+ * <p>Title: liteflow</p>
+ * <p>Description: 轻量级的组件式流程框架</p>
+ * @author Bryan.Zhang
+ * @email weenyc31@163.com
+ * @Date 2020/4/1
+ */
+package com.yomahub.liteflow.test.switchError.cmp;
+
+import com.yomahub.liteflow.annotation.LiteflowComponent;
+import com.yomahub.liteflow.core.NodeComponent;
+
+@LiteflowComponent("c")
+public class CCmp extends NodeComponent {
+
+	@Override
+	public void process() {
+		System.out.println("CCmp executed!");
+	}
+
+}
diff --git a/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/java/com/yomahub/liteflow/test/switchError/cmp/DCmp.java b/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/java/com/yomahub/liteflow/test/switchError/cmp/DCmp.java
new file mode 100644
index 000000000..0ea34fb48
--- /dev/null
+++ b/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/java/com/yomahub/liteflow/test/switchError/cmp/DCmp.java
@@ -0,0 +1,21 @@
+/**
+ * <p>Title: liteflow</p>
+ * <p>Description: 轻量级的组件式流程框架</p>
+ * @author Bryan.Zhang
+ * @email weenyc31@163.com
+ * @Date 2020/4/1
+ */
+package com.yomahub.liteflow.test.switchError.cmp;
+
+import com.yomahub.liteflow.annotation.LiteflowComponent;
+import com.yomahub.liteflow.core.NodeComponent;
+
+@LiteflowComponent("d")
+public class DCmp extends NodeComponent {
+
+	@Override
+	public void process() {
+		System.out.println("DCmp executed!");
+	}
+
+}
diff --git a/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/java/com/yomahub/liteflow/test/switchError/cmp/ESwitchCmp.java b/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/java/com/yomahub/liteflow/test/switchError/cmp/ESwitchCmp.java
new file mode 100644
index 000000000..bbbeb4cde
--- /dev/null
+++ b/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/java/com/yomahub/liteflow/test/switchError/cmp/ESwitchCmp.java
@@ -0,0 +1,20 @@
+/**
+ * <p>Title: liteflow</p>
+ * <p>Description: 轻量级的组件式流程框架</p>
+ * @author Bryan.Zhang
+ * @email weenyc31@163.com
+ * @Date 2020/4/1
+ */
+package com.yomahub.liteflow.test.switchError.cmp;
+
+import com.yomahub.liteflow.core.NodeSwitchComponent;
+import org.springframework.stereotype.Component;
+
+@Component("e")
+public class ESwitchCmp extends NodeSwitchComponent {
+
+	@Override
+	public String processSwitch() throws Exception {
+		return "d";
+	}
+}
diff --git a/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/resources/cmpStep/flow.el.xml b/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/resources/cmpStep/flow.el.xml
index f67c0e845..e4a1e577a 100644
--- a/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/resources/cmpStep/flow.el.xml
+++ b/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/resources/cmpStep/flow.el.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <flow>
     <chain name="chain1">
-        THEN(a, b, WHEN(c, d));
+        THEN(a.tag("A"), b.tag("B"), WHEN(c.tag("C"), d.tag("D")));
     </chain>
 
     <chain name="chain2">
@@ -9,6 +9,6 @@
     </chain>
 
     <chain name="chain3">
-        THEN(a, b, a, a, b);
+        THEN(a.tag("a1"), b, a.tag("a2"), a.tag("a3"), b);
     </chain>
 </flow>
\ No newline at end of file
diff --git a/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/resources/switchError/application.properties b/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/resources/switchError/application.properties
new file mode 100644
index 000000000..bc60f8a63
--- /dev/null
+++ b/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/resources/switchError/application.properties
@@ -0,0 +1 @@
+liteflow.rule-source=switchError/flow.el.xml
\ No newline at end of file
diff --git a/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/resources/switchError/flow.el.xml b/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/resources/switchError/flow.el.xml
new file mode 100644
index 000000000..2f7e92bc2
--- /dev/null
+++ b/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/resources/switchError/flow.el.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<flow>
+    <chain name="chain1">
+        THEN(
+            a,
+            SWITCH(e).to(d),
+            b
+        );
+    </chain>
+</flow>
\ No newline at end of file
diff --git a/liteflow-testcase-el/liteflow-testcase-el-springnative/src/test/java/com/yomahub/liteflow/test/BaseTest.java b/liteflow-testcase-el/liteflow-testcase-el-springnative/src/test/java/com/yomahub/liteflow/test/BaseTest.java
index 0924ff42c..64886670f 100644
--- a/liteflow-testcase-el/liteflow-testcase-el-springnative/src/test/java/com/yomahub/liteflow/test/BaseTest.java
+++ b/liteflow-testcase-el/liteflow-testcase-el-springnative/src/test/java/com/yomahub/liteflow/test/BaseTest.java
@@ -1,7 +1,6 @@
 package com.yomahub.liteflow.test;
 
 import com.yomahub.liteflow.flow.FlowBus;
-import com.yomahub.liteflow.flow.id.IdGeneratorHolder;
 import com.yomahub.liteflow.property.LiteflowConfigGetter;
 import com.yomahub.liteflow.spi.holder.SpiFactoryCleaner;
 import com.yomahub.liteflow.spring.ComponentScanner;
diff --git a/liteflow-testcase-el/liteflow-testcase-el-springnative/src/test/java/com/yomahub/liteflow/test/cmpStep/CmpStepELSpringTest.java b/liteflow-testcase-el/liteflow-testcase-el-springnative/src/test/java/com/yomahub/liteflow/test/cmpStep/CmpStepELSpringTest.java
index 9c714a677..bceba7fcf 100644
--- a/liteflow-testcase-el/liteflow-testcase-el-springnative/src/test/java/com/yomahub/liteflow/test/cmpStep/CmpStepELSpringTest.java
+++ b/liteflow-testcase-el/liteflow-testcase-el-springnative/src/test/java/com/yomahub/liteflow/test/cmpStep/CmpStepELSpringTest.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;
@@ -10,6 +11,10 @@ import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit4.SpringRunner;
 
 import javax.annotation.Resource;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Queue;
+import java.util.Set;
 
 @RunWith(SpringRunner.class)
 @ContextConfiguration("classpath:/cmpStep/application.xml")
@@ -37,4 +42,22 @@ public class CmpStepELSpringTest extends BaseTest {
         Assert.assertTrue(response.isSuccess());
         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());
+
+        Set<String> tagSet = new HashSet<>();
+        response.getExecuteStepQueue().stream().filter(
+                cmpStep -> cmpStep.getNodeId().equals("a")
+        ).forEach(cmpStep -> tagSet.add(cmpStep.getTag()));
+
+        Assert.assertEquals(3, tagSet.size());
+
+    }
 }
diff --git a/liteflow-testcase-el/liteflow-testcase-el-springnative/src/test/resources/cmpStep/flow.el.xml b/liteflow-testcase-el/liteflow-testcase-el-springnative/src/test/resources/cmpStep/flow.el.xml
index c70aa571c..e4a1e577a 100644
--- a/liteflow-testcase-el/liteflow-testcase-el-springnative/src/test/resources/cmpStep/flow.el.xml
+++ b/liteflow-testcase-el/liteflow-testcase-el-springnative/src/test/resources/cmpStep/flow.el.xml
@@ -1,10 +1,14 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <flow>
     <chain name="chain1">
-        THEN(a, b, WHEN(c, d));
+        THEN(a.tag("A"), b.tag("B"), WHEN(c.tag("C"), d.tag("D")));
     </chain>
 
     <chain name="chain2">
         THEN(WHEN(e, a).any(true), b);
     </chain>
+
+    <chain name="chain3">
+        THEN(a.tag("a1"), b, a.tag("a2"), a.tag("a3"), b);
+    </chain>
 </flow>
\ No newline at end of file
diff --git a/liteflow-testcase-old/liteflow-testcase-declare-springboot/src/test/java/com/yomahub/liteflow/test/BaseTest.java b/liteflow-testcase-old/liteflow-testcase-declare-springboot/src/test/java/com/yomahub/liteflow/test/BaseTest.java
index 9f5684c5a..3a79ad7b0 100644
--- a/liteflow-testcase-old/liteflow-testcase-declare-springboot/src/test/java/com/yomahub/liteflow/test/BaseTest.java
+++ b/liteflow-testcase-old/liteflow-testcase-declare-springboot/src/test/java/com/yomahub/liteflow/test/BaseTest.java
@@ -1,7 +1,6 @@
 package com.yomahub.liteflow.test;
 
 import com.yomahub.liteflow.flow.FlowBus;
-import com.yomahub.liteflow.flow.id.IdGeneratorHolder;
 import com.yomahub.liteflow.property.LiteflowConfigGetter;
 import com.yomahub.liteflow.spi.holder.SpiFactoryCleaner;
 import com.yomahub.liteflow.spring.ComponentScanner;
diff --git a/liteflow-testcase-old/liteflow-testcase-nospring/src/test/java/com/yomahub/liteflow/test/BaseTest.java b/liteflow-testcase-old/liteflow-testcase-nospring/src/test/java/com/yomahub/liteflow/test/BaseTest.java
index 406a91d4c..2dc0c9b8e 100644
--- a/liteflow-testcase-old/liteflow-testcase-nospring/src/test/java/com/yomahub/liteflow/test/BaseTest.java
+++ b/liteflow-testcase-old/liteflow-testcase-nospring/src/test/java/com/yomahub/liteflow/test/BaseTest.java
@@ -2,7 +2,6 @@ package com.yomahub.liteflow.test;
 
 import com.yomahub.liteflow.core.FlowExecutorHolder;
 import com.yomahub.liteflow.flow.FlowBus;
-import com.yomahub.liteflow.flow.id.IdGeneratorHolder;
 import com.yomahub.liteflow.property.LiteflowConfigGetter;
 import com.yomahub.liteflow.spi.holder.SpiFactoryCleaner;
 import com.yomahub.liteflow.thread.ExecutorHelper;
diff --git a/liteflow-testcase-old/liteflow-testcase-springboot/src/test/java/com/yomahub/liteflow/test/BaseTest.java b/liteflow-testcase-old/liteflow-testcase-springboot/src/test/java/com/yomahub/liteflow/test/BaseTest.java
index 0924ff42c..64886670f 100644
--- a/liteflow-testcase-old/liteflow-testcase-springboot/src/test/java/com/yomahub/liteflow/test/BaseTest.java
+++ b/liteflow-testcase-old/liteflow-testcase-springboot/src/test/java/com/yomahub/liteflow/test/BaseTest.java
@@ -1,7 +1,6 @@
 package com.yomahub.liteflow.test;
 
 import com.yomahub.liteflow.flow.FlowBus;
-import com.yomahub.liteflow.flow.id.IdGeneratorHolder;
 import com.yomahub.liteflow.property.LiteflowConfigGetter;
 import com.yomahub.liteflow.spi.holder.SpiFactoryCleaner;
 import com.yomahub.liteflow.spring.ComponentScanner;
diff --git a/liteflow-testcase-old/liteflow-testcase-springnative/src/test/java/com/yomahub/liteflow/test/BaseTest.java b/liteflow-testcase-old/liteflow-testcase-springnative/src/test/java/com/yomahub/liteflow/test/BaseTest.java
index 0924ff42c..64886670f 100644
--- a/liteflow-testcase-old/liteflow-testcase-springnative/src/test/java/com/yomahub/liteflow/test/BaseTest.java
+++ b/liteflow-testcase-old/liteflow-testcase-springnative/src/test/java/com/yomahub/liteflow/test/BaseTest.java
@@ -1,7 +1,6 @@
 package com.yomahub.liteflow.test;
 
 import com.yomahub.liteflow.flow.FlowBus;
-import com.yomahub.liteflow.flow.id.IdGeneratorHolder;
 import com.yomahub.liteflow.property.LiteflowConfigGetter;
 import com.yomahub.liteflow.spi.holder.SpiFactoryCleaner;
 import com.yomahub.liteflow.spring.ComponentScanner;
diff --git a/pom.xml b/pom.xml
index fb49fb088..96202f3a8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -39,7 +39,7 @@
 	</scm>
 
 	<properties>
-		<revision>2.8.1</revision>
+		<revision>2.8.2</revision>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 		<maven.compiler.source>8</maven.compiler.source>