diff --git a/src/main/java/com/nhn/hippo/web/calltree/span/SpanAlign.java b/src/main/java/com/nhn/hippo/web/calltree/span/SpanAlign.java
index 9946d8b42..5af38793a 100644
--- a/src/main/java/com/nhn/hippo/web/calltree/span/SpanAlign.java
+++ b/src/main/java/com/nhn/hippo/web/calltree/span/SpanAlign.java
@@ -37,7 +37,7 @@ public class SpanAlign {
 		return depth;
 	}
 
-	public SpanBo getSpan() {
+	public SpanBo getSpanBo() {
 		return spanBo;
 	}
 
diff --git a/src/main/java/com/nhn/hippo/web/calltree/span/SpanPopulator.java b/src/main/java/com/nhn/hippo/web/calltree/span/SpanPopulator.java
index 862a571e9..884554f37 100644
--- a/src/main/java/com/nhn/hippo/web/calltree/span/SpanPopulator.java
+++ b/src/main/java/com/nhn/hippo/web/calltree/span/SpanPopulator.java
@@ -35,7 +35,7 @@ public class SpanPopulator {
 
     private void populatedSpan(List<SpanAlign> populatedList) {
         SpanAlign spanAlign = list.get(index);
-        SpanBo span = spanAlign.getSpan();
+        SpanBo span = spanAlign.getSpanBo();
         populatedList.add(spanAlign);
         long startTime = span.getStartTime();
         List<SubSpanBo> subSpanBos = sortSubSpan(span);
@@ -62,7 +62,7 @@ public class SpanPopulator {
         if (nextIndex >= list.size()) {
             return Long.MAX_VALUE;
         }
-        return list.get(nextIndex).getSpan().getStartTime();
+        return list.get(nextIndex).getSpanBo().getStartTime();
     }
 
     private List<SubSpanBo> sortSubSpan(SpanBo span) {
diff --git a/src/main/java/com/nhn/hippo/web/controller/BusinessTransactionController.java b/src/main/java/com/nhn/hippo/web/controller/BusinessTransactionController.java
index b80f7f8fa..146cd0f69 100644
--- a/src/main/java/com/nhn/hippo/web/controller/BusinessTransactionController.java
+++ b/src/main/java/com/nhn/hippo/web/controller/BusinessTransactionController.java
@@ -37,34 +37,39 @@ public class BusinessTransactionController {
 	public ModelAndView flow(@RequestParam(value = "traceId") String traceId) {
 		logger.debug("traceId:{}", traceId);
 
-		// select spans
-		List<SpanAlign> spanAligns = spanService.selectSpan(traceId);
-
 		ModelAndView mv = new ModelAndView("selectTransaction");
 
-		if (spanAligns.isEmpty()) {
-			mv.addObject("errorCode", 9);
-			mv.setViewName("error");
-			return mv;
+		try {
+			// select spans
+			List<SpanAlign> spanAligns = spanService.selectSpan(traceId);
+
+			if (spanAligns.isEmpty()) {
+				mv.addObject("errorCode", 9);
+				mv.setViewName("error");
+				return mv;
+			}
+
+			// debug
+			mv.addObject("spanList", spanAligns);
+
+			mv.addObject("traceId", traceId);
+
+			// call tree
+			ServerCallTree callTree = flow.selectServerCallTree(new TraceId(UUID.fromString(traceId)));
+			mv.addObject("nodes", callTree.getNodes());
+			mv.addObject("links", callTree.getLinks());
+
+			// call stacks
+			RecordSet recordset = new RecordSet(spanAligns);
+			mv.addObject("applicationName", recordset.getApplicationName());
+			mv.addObject("callstack", recordset.getIterator());
+			mv.addObject("timeline", recordset.getIterator());
+			mv.addObject("callstackStart", recordset.getStartTime());
+			mv.addObject("callstackEnd", recordset.getEndTime());
+
+		} catch (Exception e) {
+			e.printStackTrace();
 		}
-		
-		// debug 
-		mv.addObject("spanList", spanAligns);
-		
-		mv.addObject("traceId", traceId);
-
-		// call tree
-		ServerCallTree callTree = flow.selectServerCallTree(new TraceId(UUID.fromString(traceId)));
-		mv.addObject("nodes", callTree.getNodes());
-		mv.addObject("links", callTree.getLinks());
-
-		// call stacks
-		RecordSet recordset = new RecordSet(spanAligns);
-		mv.addObject("applicationName", recordset.getApplicationName());
-		mv.addObject("callstack", recordset.getIterator());
-		mv.addObject("timeline", recordset.getIterator());
-		mv.addObject("callstackStart", recordset.getStartTime());
-		mv.addObject("callstackEnd", recordset.getEndTime());
 
 		return mv;
 	}
diff --git a/src/main/java/com/nhn/hippo/web/service/SpanServiceImpl.java b/src/main/java/com/nhn/hippo/web/service/SpanServiceImpl.java
index 726981392..96ce84212 100644
--- a/src/main/java/com/nhn/hippo/web/service/SpanServiceImpl.java
+++ b/src/main/java/com/nhn/hippo/web/service/SpanServiceImpl.java
@@ -60,7 +60,7 @@ public class SpanServiceImpl implements SpanService {
 		for (SpanAlign spanAlign : spans) {
 			List<AnnotationBo> annotationBoList;
 			if (spanAlign.isSpan()) {
-				annotationBoList = spanAlign.getSpan().getAnnotationBoList();
+				annotationBoList = spanAlign.getSpanBo().getAnnotationBoList();
 				annotationReplacementCallback.replacement(spanAlign, annotationBoList);
 			} else {
 				annotationBoList = spanAlign.getSubSpanBo().getAnnotationBoList();
@@ -79,7 +79,7 @@ public class SpanServiceImpl implements SpanService {
 				}
 
 				String agentId = getAgentId(spanAlign);
-				long startTime = spanAlign.getSpan().getStartTime();
+				long startTime = spanAlign.getSpanBo().getStartTime();
 				long agentStartTime = agentInfoDao.selectAgentInfoBeforeStartTime(agentId, startTime);
 				logger.info("{} Agent StartTime fonud:{}", agentId, agentStartTime);
 
@@ -145,7 +145,7 @@ public class SpanServiceImpl implements SpanService {
 
 	private String getAgentId(SpanAlign spanAlign) {
 		if (spanAlign.isSpan()) {
-			return spanAlign.getSpan().getAgentId();
+			return spanAlign.getSpanBo().getAgentId();
 		} else {
 			return spanAlign.getSubSpanBo().getAgentId();
 		}
diff --git a/src/main/java/com/nhn/hippo/web/vo/callstacks/RecordSet.java b/src/main/java/com/nhn/hippo/web/vo/callstacks/RecordSet.java
index a50ae9597..4ade9c0c7 100644
--- a/src/main/java/com/nhn/hippo/web/vo/callstacks/RecordSet.java
+++ b/src/main/java/com/nhn/hippo/web/vo/callstacks/RecordSet.java
@@ -79,7 +79,7 @@ public class RecordSet {
 
         for (SpanAlign sa : spanAligns) {
             if (sa.isSpan()) {
-                SpanBo span = sa.getSpan();
+                SpanBo span = sa.getSpanBo();
                 AnnotationUtils.sortAnnotationListByKey(span);
                 String method = (String) AnnotationUtils.getDisplayMethod(span);
                 String arguments = (String) AnnotationUtils.getDisplayArgument(span);
@@ -103,7 +103,7 @@ public class RecordSet {
                 String method = (String) AnnotationUtils.getDisplayMethod(subSpan);
                 Object arguments = AnnotationUtils.getDisplayArgument(subSpan);
 
-                long begin = sa.getSpan().getStartTime() + subSpan.getStartElapsed();
+                long begin = sa.getSpanBo().getStartTime() + subSpan.getStartElapsed();
                 long elapsed = subSpan.getEndElapsed();
 
                 if (!marked) {
diff --git a/src/main/webapp/WEB-INF/views/selectTransaction.jsp b/src/main/webapp/WEB-INF/views/selectTransaction.jsp
index e3381e491..5155d7d60 100644
--- a/src/main/webapp/WEB-INF/views/selectTransaction.jsp
+++ b/src/main/webapp/WEB-INF/views/selectTransaction.jsp
@@ -287,8 +287,8 @@
            <tbody>
 
            <c:forEach items="${spanList}" var="span" varStatus="status">
-               <c:if test="${span.root}">
-                   <c:set var="sp" scope="page" value="${span.span}"/>
+               <c:if test="${span.span}">
+                   <c:set var="sp" scope="page" value="${span.spanBo}"/>
                    <c:forEach items="${sp.annotationBoList}" var="ano" varStatus="annoStatus">
                        <tr>
                            <td>${span.depth}</td>
@@ -304,7 +304,7 @@
                        <td colspan="7">&nbsp;</td>
                    </tr>
                </c:if>
-               <c:if test="${!span.root}">
+               <c:if test="${!span.span}">
                    <c:set var="subSp" scope="page" value="${span.subSpanBo}"/>
                    <c:forEach items="${subSp.annotationBoList}" var="ano" varStatus="annoStatus">
                        <tr>
diff --git a/src/test/java/com/nhn/hippo/web/service/SpanServiceTest.java b/src/test/java/com/nhn/hippo/web/service/SpanServiceTest.java
index 7cd412ced..770da1424 100644
--- a/src/test/java/com/nhn/hippo/web/service/SpanServiceTest.java
+++ b/src/test/java/com/nhn/hippo/web/service/SpanServiceTest.java
@@ -104,7 +104,7 @@ public class SpanServiceTest {
 
         List<SpanAlign> sort = spanService.selectSpan(uuid.toString());
         for (SpanAlign spanAlign : sort) {
-            logger.info("depth:{} {}", spanAlign.getDepth(), spanAlign.getSpan());
+            logger.info("depth:{} {}", spanAlign.getDepth(), spanAlign.getSpanBo());
         }
         // reorder(spans);
     }