From c1a5f82ba1e4cd4c55a91e2c07d31b51e54d4552 Mon Sep 17 00:00:00 2001
From: muzuro <zufarm@gmail.com>
Date: Wed, 28 Sep 2016 12:06:01 +0300
Subject: [PATCH] fix memory leak

---
 .../graphhopper/jsprit/core/algorithm/box/Jsprit.java  | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/jsprit-core/src/main/java/com/graphhopper/jsprit/core/algorithm/box/Jsprit.java b/jsprit-core/src/main/java/com/graphhopper/jsprit/core/algorithm/box/Jsprit.java
index 818767f2..0ada8a96 100644
--- a/jsprit-core/src/main/java/com/graphhopper/jsprit/core/algorithm/box/Jsprit.java
+++ b/jsprit-core/src/main/java/com/graphhopper/jsprit/core/algorithm/box/Jsprit.java
@@ -629,13 +629,21 @@ public class Jsprit {
             });
         }
         if (es != null) {
-            Runtime.getRuntime().addShutdownHook(new Thread() {
+            final Thread hook = new Thread() {
                 public void run() {
                     if (!es.isShutdown()) {
                         System.err.println("shutdowHook shuts down executorService");
                         es.shutdown();
                     }
                 }
+            };
+            Runtime.getRuntime().addShutdownHook(hook);
+            vra.addListener(new AlgorithmEndsListener() {
+                @Override
+                public void informAlgorithmEnds(VehicleRoutingProblem aProblem,
+                        Collection<VehicleRoutingProblemSolution> aSolutions) {
+                    Runtime.getRuntime().removeShutdownHook(hook);
+                }
             });
         }
     }