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 a0ab948e2..703de5b89 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
@@ -15,33 +15,88 @@ import org.slf4j.LoggerFactory;
 public class SpanAligner2 {
     private final Logger logger = LoggerFactory.getLogger(this.getClass());
 
+    // 매치가 안됨.
+    public static final int FAIL_MATCH = 0;
+    // transaction이 완벽하게 끝남.
+    public static final int BEST_MATCH = 1;
+    // transaction이 진행중이거나. 일부 분실된 데이터가 있음.
+    public static final int START_TIME_MATCH = 2;
+
+
     private static final Integer ROOT = -1;
 	private final Map<Integer, SpanBo> spanMap;
 	private Integer rootSpanId = null;
+    private int matchType = FAIL_MATCH;
 
-	public SpanAligner2(List<SpanBo> spans) {
-		spanMap = new HashMap<Integer, SpanBo>(spans.size());
+	public SpanAligner2(List<SpanBo> spans, long selectedSpanStartTime) {
+        this.spanMap = buildSpanMap(spans);
+        this.rootSpanId = findRootSpanId(spans, selectedSpanStartTime);
+    }
 
-		long rootSpanStartTime = Long.MAX_VALUE;
+    private int findRootSpanId(List<SpanBo> spans, long selectedSpanStartTime) {
+        final List<SpanBo> root = new ArrayList<SpanBo>();
+        for (SpanBo span : spans) {
+            if (span.getParentSpanId() == ROOT) {
+                root.add(span);
+            }
+        }
+        // 최상 조건의 best매치. 완벽 조건의 매치.
+        final int matchSize = root.size();
+        if (matchSize == 1) {
+            final SpanBo spanBo = root.get(0);
+            logger.debug("root span found best match:{}", spanBo);
+            matchType = BEST_MATCH;
+            return spanBo.getSpanId();
+        }
+        // 버그 rootspan이 2개 이상인 경우는 로직 버그이다. 아무거나 잡아서 데이터를 뿌려줘야 되나?
+        if (matchSize > 1) {
+            logger.warn("parentSpanId(-1) collision. size:{} root span:{} allSpan:{}", matchSize, root, spans);
+            throw new IllegalStateException("parentSpanId(-1) collision. size:" + matchSize);
+        }
 
-		for (SpanBo span : spans) {
-			if (spanMap.containsKey(span.getSpanId())) {
-				throw new IllegalStateException("duplicated spanId. id:" + span.getSpanId());
-			}
+        // root 분실. 혹은 아직 도착하지 않아 root가 완성 되지 않음. 즉 진행중인 process일 수 있음.
+        // 차선책으로 자신이 조회한 span의 시작 시간을 기준으로 span을 조회한다.
+        // span에서 데이터를 추출하는 것이기 때문에, 왠간하면 데이터는 존재함. hbase insert시 data insert를 실패할 경우 없을수 있음.
+        final List<SpanBo> startTimeMatcher = new ArrayList<SpanBo>();
+        for(SpanBo span : spans) {
+            // collectorTime이 힌트로 들어온다.
+            if (span.getCollectorAcceptTime() == selectedSpanStartTime) {
+                startTimeMatcher.add(span);
+            }
+        }
+        // startTime 기반 match. 아래 추가 정보가 제공 되면 더 정확하게 매치가 가능하다.
+        // 이중에서 어느 정보를 얻으면 가장 쉽고 정확하게 매치가 가능한가? agentId가 제일 무난하지 않나 함.
+        // "applicationName" : "/httpclient4/post.pinpoint",
+        // "transactionId" : "emeroad-pc^1382955966412^16",
+        // "agentId" : "emeroad-pc",
+        // "applicationId" : "emeroad-app",
+        // "callStackStart" : 1383024213315,
+        // "callStackEnd" : 2010,
+        final int startMatchSize = startTimeMatcher.size();
+        if (startMatchSize == 1) {
+            final SpanBo spanBo = startTimeMatcher.get(0);
+            logger.info("startTime span found startTime match:{}", spanBo);
+            matchType = START_TIME_MATCH;
+            return spanBo.getSpanId();
+        }
+        if (startMatchSize > 1) {
+            logger.warn("startTime match collision. size:{} selectedSpanStartTime:{} span:{} allSpan:{}", startMatchSize, selectedSpanStartTime, startMatchSize, spans);
+            throw new IllegalStateException("startTime match collision size:" + startMatchSize + " selectedSpanStartTime:" + selectedSpanStartTime);
+        }
+        // 여기서 다음상황으로 더 정확하게 매치가 가능한가? 마땅히 call stack을 랜더링 할수 있는 방법 없음
+        logger.warn("startTime match not found. size:{} selectedSpanStartTime:{} span:{} allSpan:{}", startMatchSize, selectedSpanStartTime, startMatchSize, spans);
+        throw new IllegalStateException("startTime match not found startTime size:" + startMatchSize + " selectedSpanStartTime:" + selectedSpanStartTime);
+    }
 
-			if (span.getParentSpanId() == ROOT) {
-				rootSpanId = ROOT;
-				spanMap.put(ROOT, span);
-				continue;
-			} else if ((rootSpanId == null || !rootSpanId.equals(ROOT)) && span.getStartTime() < rootSpanStartTime) {
-				rootSpanId = (span.getParentSpanId() == ROOT) ? ROOT : span.getSpanId();
-				rootSpanStartTime = span.getStartTime();
-			}
-			spanMap.put(span.getSpanId(), span);
-		}
-	}
+    private Map<Integer, SpanBo> buildSpanMap(List<SpanBo> spans) {
+        Map<Integer, SpanBo> spanMap = new HashMap<Integer, SpanBo>();
+        for (SpanBo span : spans) {
+            spanMap.put(span.getSpanId(), span);
+        }
+        return spanMap;
+    }
 
-	public List<SpanAlign> sort() {
+    public List<SpanAlign> sort() {
 		List<SpanAlign> list = new ArrayList<SpanAlign>();
 		final SpanBo root = spanMap.get(rootSpanId);
 		if (root == null) {
@@ -53,7 +108,11 @@ public class SpanAligner2 {
 		return list;
 	}
 
-	private void populate(SpanBo span, int spanDepth, List<SpanAlign> container) {
+    public int getMatchType() {
+        return matchType;
+    }
+
+    private void populate(SpanBo span, int spanDepth, List<SpanAlign> container) {
         logger.debug("populate start");
 		int currentDepth = spanDepth;
         if (logger.isDebugEnabled()) {
diff --git a/src/main/java/com/nhn/pinpoint/web/controller/BusinessTransactionController.java b/src/main/java/com/nhn/pinpoint/web/controller/BusinessTransactionController.java
index fe000677f..4c4d402ca 100644
--- a/src/main/java/com/nhn/pinpoint/web/controller/BusinessTransactionController.java
+++ b/src/main/java/com/nhn/pinpoint/web/controller/BusinessTransactionController.java
@@ -7,6 +7,7 @@ import java.util.Set;
 
 import javax.servlet.http.HttpServletResponse;
 
+import com.nhn.pinpoint.web.service.SpanResult;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -47,7 +48,7 @@ public class BusinessTransactionController {
 	@Autowired
 	private FlowChartService flow;
 
-	/**
+    /**
 	 * applicationname에서 from ~ to 시간대에 수행된 URL을 조회한다.
 	 * 
 	 * @param model
@@ -97,69 +98,72 @@ public class BusinessTransactionController {
 		return getBusinessTransactionsData(model, response, applicationName, from, to, filterText, limit);
 	}
 
-	/**
-	 * 선택한 하나의 Transaction 정보 조회.
-	 *  
-	 * @param traceIdParam
-	 * @param focusTimestamp
-	 * @return
-	 */
-	@RequestMapping(value = "/transactionInfo", method = RequestMethod.GET)
-	public ModelAndView transactionInfo(@RequestParam("traceId") String traceIdParam, @RequestParam("focusTimestamp") long focusTimestamp,
-										// FIXME jsonResult는 UI 개발 편의를 위해 임시로 추가된 변수 임. 나중에 제거.
-										// 기존 html view에서 json을 넘어가는 중임.
-										@RequestParam(value="jsonResult", required=false, defaultValue="false") boolean jsonResult,
-										@RequestParam(value="v", required=false, defaultValue="0") int viewVersion) {
-		logger.debug("traceId:{}", traceIdParam);
+    /**
+     * 선택한 하나의 Transaction 정보 조회.
+     *
+     * @param traceIdParam
+     * @param focusTimestamp
+     * @return
+     */
+    @RequestMapping(value = "/transactionInfo", method = RequestMethod.GET)
+    public ModelAndView transactionInfo(@RequestParam("traceId") String traceIdParam, @RequestParam("focusTimestamp") long focusTimestamp,
+                                        // FIXME jsonResult는 UI 개발 편의를 위해 임시로 추가된 변수 임. 나중에 제거.
+                                        // 기존 html view에서 json을 넘어가는 중임.
+                                        @RequestParam(value = "jsonResult", required = false, defaultValue = "false") boolean jsonResult,
+                                        @RequestParam(value = "v", required = false, defaultValue = "0") int viewVersion) {
+        logger.debug("traceId:{}", traceIdParam);
 
-		final TransactionId traceId = new TransactionId(traceIdParam);
+        final TransactionId traceId = new TransactionId(traceIdParam);
 
-		ModelAndView mv = new ModelAndView("transactionInfo");
+        ModelAndView mv = new ModelAndView("transactionInfo");
 
-		try {
-			// select spans
-			List<SpanAlign> spanAligns = this.spanService.selectSpan(traceId);
+        try {
+            // select spans
+            final SpanResult spanResult = this.spanService.selectSpan(traceId, focusTimestamp);
+            List<SpanAlign> spanAligns = spanResult.getSpanAlign();
 
-			if (spanAligns.isEmpty()) {
-				mv.addObject("errorCode", 9);
-				mv.setViewName("error");
-				return mv;
-			}
+            if (spanAligns.isEmpty()) {
+                mv.addObject("errorCode", 9);
+                mv.setViewName("error");
+                return mv;
+            }
 
-			// debug
-			mv.addObject("spanList", spanAligns);
+            // debug
+            mv.addObject("spanList", spanAligns);
 
-			mv.addObject("traceId", traceId);
+            mv.addObject("traceId", traceId);
 
-			// call tree
-			ServerCallTree callTree = this.flow.selectServerCallTree(traceId);
-			mv.addObject("nodes", callTree.getNodes());
-			mv.addObject("links", callTree.getLinks());
+            // call tree
+            ServerCallTree callTree = this.flow.selectServerCallTree(traceId);
+            mv.addObject("nodes", callTree.getNodes());
+            mv.addObject("links", callTree.getLinks());
 
-			// call stacks
-			RecordSet recordSet = this.recordSetService.createRecordSet(spanAligns, focusTimestamp);
-			mv.addObject("recordSet", recordSet);
+            // call stacks
+            RecordSet recordSet = this.recordSetService.createRecordSet(spanAligns, focusTimestamp);
+            mv.addObject("recordSet", recordSet);
 
-			mv.addObject("applicationName", recordSet.getApplicationName());
-			mv.addObject("callstack", recordSet.getRecordList());
-			mv.addObject("timeline", recordSet.getRecordList());
-			mv.addObject("callstackStart", recordSet.getStartTime());
-			mv.addObject("callstackEnd", recordSet.getEndTime());
-		} catch (Exception e) {
-			logger.warn("BusinessTransactionController Error Cause" + e.getMessage(), e);
-			// TODO 아무래도 다시 던져야 될듯한데. Exception처리 정책을 생각해봐야 한다.
-			// throw e;
-		}
+            mv.addObject("applicationName", recordSet.getApplicationName());
+            mv.addObject("callstack", recordSet.getRecordList());
+            mv.addObject("timeline", recordSet.getRecordList());
+            mv.addObject("callstackStart", recordSet.getStartTime());
+            mv.addObject("callstackEnd", recordSet.getEndTime());
+            mv.addObject("completeState", spanResult.getCompleteTypeString());
+        } catch (Exception e) {
+            logger.warn("BusinessTransactionController Error Cause" + e.getMessage(), e);
+            // TODO 아무래도 다시 던져야 될듯한데. Exception처리 정책을 생각해봐야 한다.
+            // throw e;
+        }
+
+        // FIXME jsonResult는 UI 개발 편의를 위해 임시로 추가된 변수 임. 나중에 제거.
+        if (jsonResult) {
+            if (viewVersion == 2) {
+                mv.setViewName("transactionInfoJsonHash");
+            } else {
+                mv.setViewName("transactionInfoJson");
+            }
+        }
+
+        return mv;
+    }
 
-		// FIXME jsonResult는 UI 개발 편의를 위해 임시로 추가된 변수 임. 나중에 제거.
-		if (jsonResult) {
-			if (viewVersion == 2) {
-				mv.setViewName("transactionInfoJsonHash");
-			} else {
-				mv.setViewName("transactionInfoJson");
-			}
-		}
-		
-		return mv;
-	}
 }
diff --git a/src/main/java/com/nhn/pinpoint/web/service/SpanResult.java b/src/main/java/com/nhn/pinpoint/web/service/SpanResult.java
new file mode 100644
index 000000000..555f3f3bb
--- /dev/null
+++ b/src/main/java/com/nhn/pinpoint/web/service/SpanResult.java
@@ -0,0 +1,45 @@
+package com.nhn.pinpoint.web.service;
+
+import com.nhn.pinpoint.web.calltree.span.SpanAlign;
+import com.nhn.pinpoint.web.calltree.span.SpanAligner2;
+
+import java.util.List;
+
+/**
+ *
+ */
+public class SpanResult {
+    private int completeType;
+    private List<SpanAlign> spanAlign;
+    private Object completeTypeString;
+
+    public SpanResult(int completeType, List<SpanAlign> spanAlign) {
+        if (spanAlign == null) {
+            throw new NullPointerException("spanAlign must not be null");
+        }
+        this.completeType = completeType;
+        this.spanAlign = spanAlign;
+    }
+
+
+
+    public int getCompleteType() {
+        return completeType;
+    }
+
+    public List<SpanAlign> getSpanAlign() {
+        return spanAlign;
+    }
+
+    public String getCompleteTypeString() {
+        switch (completeType) {
+            case SpanAligner2.BEST_MATCH:
+                return "Complete";
+            case SpanAligner2.START_TIME_MATCH:
+                return "Progress";
+            case SpanAligner2.FAIL_MATCH:
+                return "Error";
+        }
+        return "Error";
+    }
+}
diff --git a/src/main/java/com/nhn/pinpoint/web/service/SpanService.java b/src/main/java/com/nhn/pinpoint/web/service/SpanService.java
index 2a902f078..d47a104e3 100644
--- a/src/main/java/com/nhn/pinpoint/web/service/SpanService.java
+++ b/src/main/java/com/nhn/pinpoint/web/service/SpanService.java
@@ -9,5 +9,5 @@ import com.nhn.pinpoint.web.vo.TransactionId;
  *
  */
 public interface SpanService {
-	List<SpanAlign> selectSpan(TransactionId transactionId);
+	SpanResult selectSpan(TransactionId transactionId, long selectedSpanHint);
 }
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 bdfb80276..32fd662a0 100644
--- a/src/main/java/com/nhn/pinpoint/web/service/SpanServiceImpl.java
+++ b/src/main/java/com/nhn/pinpoint/web/service/SpanServiceImpl.java
@@ -46,22 +46,22 @@ public class SpanServiceImpl implements SpanService {
 	private OutputParameterParser outputParameterParser = new OutputParameterParser();
 
 	@Override
-	public List<SpanAlign> selectSpan(TransactionId transactionId) {
+	public SpanResult selectSpan(TransactionId transactionId, long selectedSpanHint) {
 
 		List<SpanBo> spans = traceDao.selectSpanAndAnnotation(transactionId);
 		if (spans == null || spans.isEmpty()) {
-			return Collections.emptyList();
+			return new SpanResult(SpanAligner2.FAIL_MATCH, Collections.<SpanAlign>emptyList());
 		}
 
-		List<SpanAlign> order = order(spans);
+        SpanResult result = order(spans, selectedSpanHint);
+        List<SpanAlign> order = result.getSpanAlign();
 //		transitionApiId(order);
 		transitionDynamicApiId(order);
 		transitionSqlId(order);
         transitionCachedString(order);
         transitionException(order);
 		// TODO root span not found시 row data라도 보여줘야 됨.
-
-		return order;
+		return result;
 	}
 
 
@@ -365,14 +365,16 @@ public class SpanServiceImpl implements SpanService {
 		void replacement(SpanAlign spanAlign, List<AnnotationBo> annotationBoList);
 	}
 
-	private List<SpanAlign> order(List<SpanBo> spans) {
-		SpanAligner2 spanAligner = new SpanAligner2(spans);
+	private SpanResult order(List<SpanBo> spans, long selectedSpanHint) {
+		SpanAligner2 spanAligner = new SpanAligner2(spans, selectedSpanHint);
         List<SpanAlign> sort = spanAligner.sort();
+
         logger.trace("SpanAlignList:{}", sort);
-        return sort;
+        return new SpanResult(spanAligner.getMatchType(), sort);
 
 	}
 
+
     private static class AgentKey {
 
         private final String agentId;
diff --git a/src/main/webapp/WEB-INF/views/transactionInfoJson.jsp b/src/main/webapp/WEB-INF/views/transactionInfoJson.jsp
index 9bbeb9718..7ad8b984f 100644
--- a/src/main/webapp/WEB-INF/views/transactionInfoJson.jsp
+++ b/src/main/webapp/WEB-INF/views/transactionInfoJson.jsp
@@ -9,6 +9,7 @@
 	"applicationId" : "${recordSet.applicationId}",
 	"callStackStart" : ${callstackStart},
 	"callStackEnd" : ${callstackEnd},
+    "completeState" : "${completeState}",
 	"callStackIndex" : {
 		"depth":0,
 		"begin":1,
diff --git a/src/main/webapp/WEB-INF/views/transactionInfoJsonHash.jsp b/src/main/webapp/WEB-INF/views/transactionInfoJsonHash.jsp
index 2ee73254f..7e88d351d 100644
--- a/src/main/webapp/WEB-INF/views/transactionInfoJsonHash.jsp
+++ b/src/main/webapp/WEB-INF/views/transactionInfoJsonHash.jsp
@@ -10,6 +10,7 @@
 	
 	"callStackStart" : ${callstackStart},
 	"callStackEnd" : ${callstackEnd},
+    "completeState" : "${completeState}",
 	
 	"callStack" : [
 		<c:set var="startTime" scope="page" value="${callstackStart}"/>
diff --git a/src/test/java/com/nhn/pinpoint/web/service/SpanServiceTest.java b/src/test/java/com/nhn/pinpoint/web/service/SpanServiceTest.java
index 64a8dc05b..ac090ada1 100644
--- a/src/test/java/com/nhn/pinpoint/web/service/SpanServiceTest.java
+++ b/src/test/java/com/nhn/pinpoint/web/service/SpanServiceTest.java
@@ -4,7 +4,6 @@ import java.util.ArrayList;
 import java.util.Collections;
 import java.util.LinkedList;
 import java.util.List;
-import java.util.UUID;
 import java.util.concurrent.atomic.AtomicInteger;
 
 
@@ -108,8 +107,9 @@ public class SpanServiceTest {
 	private void doRead(TSpan span) {
         com.nhn.pinpoint.common.util.TransactionId id = TransactionIdUtils.parseTransactionId(span.getTransactionId());
         TransactionId traceId = new TransactionId(id.getAgentId(), id.getAgentStartTime(), id.getTransactionSequence());
-
-		List<SpanAlign> sort = spanService.selectSpan(traceId);
+        // selectedHint를 좀더 정확히 수정할것.
+        SpanResult spanResult = spanService.selectSpan(traceId, System.currentTimeMillis());
+        List<SpanAlign> sort = spanResult.getSpanAlign();
 		for (SpanAlign spanAlign : sort) {
 			logger.info("depth:{} {}", spanAlign.getDepth(), spanAlign.getSpanBo());
 		}
@@ -124,7 +124,6 @@ public class SpanServiceTest {
 
 	private TSpan createRootSpan() {
 		// 별도 생성기로 뽑을것.
-		UUID uuid = UUID.randomUUID();
 		List<TAnnotation> ano = Collections.emptyList();
 		long time = System.currentTimeMillis();
 		int andIncrement = id.getAndIncrement();