diff --git a/src/main/java/com/nhn/pinpoint/web/calltree/span/SpanAligner2.java b/src/main/java/com/nhn/pinpoint/web/calltree/span/SpanAligner2.java
index 37a1ba93b..d30f9aaed 100644
--- a/src/main/java/com/nhn/pinpoint/web/calltree/span/SpanAligner2.java
+++ b/src/main/java/com/nhn/pinpoint/web/calltree/span/SpanAligner2.java
@@ -4,6 +4,8 @@ import java.util.*;
 
 import com.nhn.pinpoint.common.bo.SpanBo;
 import com.nhn.pinpoint.common.bo.SpanEventBo;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * 
@@ -11,6 +13,8 @@ import com.nhn.pinpoint.common.bo.SpanEventBo;
  * 
  */
 public class SpanAligner2 {
+    private final Logger logger = LoggerFactory.getLogger(this.getClass());
+
     private static final Integer ROOT = -1;
 	private final Map<Integer, SpanBo> spanMap;
 	private Integer rootSpanId = null;
@@ -52,7 +56,9 @@ public class SpanAligner2 {
 
 	private int populate(SpanBo parentSpan, int spanDepth, int sequence, int pSequence, List<SpanAlign> container) {
 		int depth = spanDepth + 1;
-
+        if (logger.isDebugEnabled()) {
+            logger.info("span depth:{}", depth);
+        }
 		int lastChildSequence = sequence;
 		
 		SpanAlign element = new SpanAlign(depth, parentSpan, ++lastChildSequence, pSequence);
@@ -67,8 +73,15 @@ public class SpanAligner2 {
         
 		for (SpanEventBo spanEventBo : spanEventBoList) {
 			if (spanEventBo.getDepth() != -1) {
-				depth = spanDepth + spanEventBo.getDepth() + 1;
-			}
+				depth = spanDepth + spanEventBo.getDepth();
+                if (logger.isDebugEnabled()) {
+                    logger.debug("spanEvent spanEvent{} depth:{} getDepth():{}", spanEventBo.getServiceType(), depth, spanEventBo.getDepth());
+                }
+			} else {
+                if (logger.isDebugEnabled()) {
+                    logger.debug("spanEvent depth:{} ", depth);
+                }
+            }
 			
 			lastChildSequence++;
 			
diff --git a/src/main/java/com/nhn/pinpoint/web/service/RecordSetServiceImpl.java b/src/main/java/com/nhn/pinpoint/web/service/RecordSetServiceImpl.java
index 12e437f3e..3fd147f54 100644
--- a/src/main/java/com/nhn/pinpoint/web/service/RecordSetServiceImpl.java
+++ b/src/main/java/com/nhn/pinpoint/web/service/RecordSetServiceImpl.java
@@ -2,11 +2,12 @@ package com.nhn.pinpoint.web.service;
 
 
 import java.util.ArrayList;
-import java.util.Deque;
 import java.util.LinkedList;
 import java.util.List;
 
 import org.apache.commons.lang.ObjectUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.stereotype.Service;
 
 import com.nhn.pinpoint.common.AnnotationKey;
@@ -26,6 +27,8 @@ import com.nhn.pinpoint.web.vo.callstacks.RecordSet;
 @Service
 public class RecordSetServiceImpl implements RecordSetService {
 
+    private final Logger logger = LoggerFactory.getLogger(this.getClass());
+
     private ApiDescriptionParser apiDescriptionParser = new ApiDescriptionParser();
 
     @Override
@@ -54,6 +57,8 @@ public class RecordSetServiceImpl implements RecordSetService {
         recordSet.setEndTime(endTime);
 
         List<Record> recordList = populateSpanRecord(spanAlignList);
+        logger.debug("RecordList:{}", recordList);
+
         // focus 대상 record를 체크한다.
         long beginTimeStamp = focusTimeSpanBo.getStartTime();
         markFocusRecord(recordList, beginTimeStamp);
@@ -169,7 +174,7 @@ public class RecordSetServiceImpl implements RecordSetService {
 
         // annotation id는 spanalign의 seq와 무관하게 순서대로 따도 됨. 겹치지만 않으면 됨.
         Integer annotationSeq = spanAlignList.size() + 1;
-        Deque<Integer> stack = new LinkedList<Integer>();
+        final LinkedList<Integer> stack = new LinkedList<Integer>();
         stack.add(-1);
         
         int prevDepth = 0;
@@ -180,8 +185,9 @@ public class RecordSetServiceImpl implements RecordSetService {
 			int currentSeq = spanAlign.getSequence();
 			int currentDepth = spanAlign.getDepth();
 			
-//			System.out.println(i + ", prevDepth=" + prevDepth + ", currentDepth=" + currentDepth + ", currentSeq=" + currentSeq);
-			
+            if (logger.isDebugEnabled()) {
+                logger.debug("before prevDepth:{}, currentSeq:{} currentDepth:{}", prevDepth, currentSeq, currentDepth);
+            }
 			if (i == 0) {
 				// view에서 -1은 ""으로 변환됨. 최상위 노드의 부모는 ""로 표기되어야 하기 때문.
 				parentSeq = -1;
@@ -192,16 +198,22 @@ public class RecordSetServiceImpl implements RecordSetService {
 					parentSeq = stack.getLast();
 					stack.add(currentSeq);
 				} else if (prevDepth > currentDepth) {
-					stack.pollLast();
+                    Integer poll = stack.pollLast();
+                    logger.debug("pollLast:{}", poll);
 					parentSeq = stack.getLast();
 				} else {
-					parentSeq = stack.getLast();
+
+//					parentSeq = stack.getLast();
+                    // 같은 depth일 경우는 parent를 불러야 한다.
+                    final int parentIndex = stack.size() - 2;
+                    // 인덱스 체크 필요.
+                    parentSeq = stack.get(parentIndex);
 				}
 				prevDepth = currentDepth;
 			}
-			
-//			System.out.println("\tparent=" + parentSeq);
-//			System.out.println(stack);
+            if (logger.isDebugEnabled()) {
+                logger.debug("after parentSeq:{} prevDepth:{}, currentSeq:{} currentDepth:{}", parentSeq, prevDepth, currentSeq, currentDepth);
+            }
 
             if (spanAlign.isSpan()) {
                 SpanBo spanBo = spanAlign.getSpanBo();
diff --git a/src/main/java/com/nhn/pinpoint/web/service/SpanServiceImpl.java b/src/main/java/com/nhn/pinpoint/web/service/SpanServiceImpl.java
index b29e207b2..04c5591d3 100644
--- a/src/main/java/com/nhn/pinpoint/web/service/SpanServiceImpl.java
+++ b/src/main/java/com/nhn/pinpoint/web/service/SpanServiceImpl.java
@@ -322,7 +322,9 @@ public class SpanServiceImpl implements SpanService {
 
 	private List<SpanAlign> order(List<SpanBo> spans) {
 		SpanAligner2 spanAligner = new SpanAligner2(spans);
-		return spanAligner.sort();
+        List<SpanAlign> sort = spanAligner.sort();
+        logger.debug("SpanAlignList:{}", sort);
+        return sort;
 
 	}
 }
diff --git a/src/main/java/com/nhn/pinpoint/web/vo/callstacks/Record.java b/src/main/java/com/nhn/pinpoint/web/vo/callstacks/Record.java
index ac880aa46..4665b90de 100644
--- a/src/main/java/com/nhn/pinpoint/web/vo/callstacks/Record.java
+++ b/src/main/java/com/nhn/pinpoint/web/vo/callstacks/Record.java
@@ -147,9 +147,28 @@ public class Record {
     public boolean getHasChild() {
     	return hasChild;
     }
-    
+
     @Override
-	public String toString() {
-		return "Record [tab=" + tab + ", method=" + method + ", title=" + title + ", arguments=" + arguments + ", begin=" + begin + ", elapsed=" + elapsed + ", agent=" + agent + ", service=" + service + "]";
-	}
+    public String toString() {
+        final StringBuilder sb = new StringBuilder("Record{");
+        sb.append("tab=").append(tab);
+        sb.append(", id=").append(id);
+        sb.append(", pId=").append(pId);
+        sb.append(", method=").append(method);
+        sb.append(", title='").append(title).append('\'');
+        sb.append(", simpleClassName='").append(simpleClassName).append('\'');
+        sb.append(", fullApiDescription='").append(fullApiDescription).append('\'');
+        sb.append(", arguments='").append(arguments).append('\'');
+        sb.append(", begin=").append(begin);
+        sb.append(", elapsed=").append(elapsed);
+        sb.append(", agent='").append(agent).append('\'');
+        sb.append(", service='").append(service).append('\'');
+        sb.append(", serviceType=").append(serviceType);
+        sb.append(", destinationId='").append(destinationId).append('\'');
+        sb.append(", excludeFromTimeline=").append(excludeFromTimeline);
+        sb.append(", focused=").append(focused);
+        sb.append(", hasChild=").append(hasChild);
+        sb.append('}');
+        return sb.toString();
+    }
 }