From 7ff8a6669c9fdf4f2ed78a9757e9a28f484b6699 Mon Sep 17 00:00:00 2001
From: Axel Uhl <axel.uhl@sap.com>
Date: Wed, 23 Mar 2016 15:03:12 +0100
Subject: [PATCH] obtain lock for mark tracks before iterating

Change-Id: Id4258966b99bc505bed83ca8a1ab7e323bbdecf6
---
 .../sap/sailing/gwt/ui/server/SailingServiceImpl.java    | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/server/SailingServiceImpl.java b/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/server/SailingServiceImpl.java
index 8aa0618eedb..800a562472d 100644
--- a/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/server/SailingServiceImpl.java
+++ b/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/server/SailingServiceImpl.java
@@ -6147,8 +6147,13 @@ public class SailingServiceImpl extends ProxiedRemoteServiceServlet implements S
      */
     private Iterable<GPSFixDTO> convertToGPSFixDTOTrack(Track<? extends GPSFix> track) {
         final List<GPSFixDTO> result = new ArrayList<>();
-        for (final GPSFix fix : track.getFixes()) {
-            result.add(convertToGPSFixDTO(fix));
+        track.lockForRead();
+        try {
+            for (final GPSFix fix : track.getFixes()) {
+                result.add(convertToGPSFixDTO(fix));
+            }
+        } finally {
+            track.unlockAfterRead();
         }
         return result;
     }