From e5540d051f654841f36bfc874eef14378a4ca33d Mon Sep 17 00:00:00 2001
From: zab2 <zab2@mail.i2p>
Date: Tue, 16 Apr 2019 00:37:29 +0000
Subject: [PATCH] proper fix for memory bug

---
 .../net/i2p/i2ptunnel/access/AccessFilter.java    | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/apps/i2ptunnel/java/src/net/i2p/i2ptunnel/access/AccessFilter.java b/apps/i2ptunnel/java/src/net/i2p/i2ptunnel/access/AccessFilter.java
index 3c6c6c27e2..6b27fe8ae9 100644
--- a/apps/i2ptunnel/java/src/net/i2p/i2ptunnel/access/AccessFilter.java
+++ b/apps/i2ptunnel/java/src/net/i2p/i2ptunnel/access/AccessFilter.java
@@ -114,11 +114,18 @@ class AccessFilter implements StatefulConnectionFilter {
     }
 
     private void reload() throws IOException {
+        Map<Hash, DestTracker> tmp = new HashMap<Hash, DestTracker>();
+        for (FilterDefinitionElement element : definition.getElements()) {
+            element.update(tmp);
+        }
+        
         synchronized(knownDests) {
-            knownDests.clear();
-            for (FilterDefinitionElement element : definition.getElements()) {
-                element.update(knownDests);
-            }
+            knownDests.keySet().retainAll(tmp.keySet());
+            for (Hash newHash : tmp.keySet()) {
+                if (knownDests.containsKey(newHash)) 
+                    continue;
+                knownDests.put(newHash, tmp.get(newHash));
+            }    
         }
         
     }