From a7d4379ef912d16177bfa7a90ccff8ab418823df Mon Sep 17 00:00:00 2001
From: Michael Peter Christen <mc@yacy.net>
Date: Wed, 19 Mar 2014 12:23:40 +0100
Subject: [PATCH] fixed shutdown of solr cores in case that more than one local
 core is to be closed (this happens if webgraph is enabled and the index is
 dumped using /IndexControlURLs_p.html

---
 .../net/yacy/cora/federate/solr/instance/InstanceMirror.java  | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/source/net/yacy/cora/federate/solr/instance/InstanceMirror.java b/source/net/yacy/cora/federate/solr/instance/InstanceMirror.java
index 23f98f9ff..d9073f586 100644
--- a/source/net/yacy/cora/federate/solr/instance/InstanceMirror.java
+++ b/source/net/yacy/cora/federate/solr/instance/InstanceMirror.java
@@ -65,7 +65,9 @@ public class InstanceMirror {
     public void disconnectEmbedded() {
         mirrorConnectorCache.clear();
         if (this.embeddedSolrInstance == null) return;
-        for (EmbeddedSolrConnector connector: this.embeddedConnectorCache.values()) connector.close();
+        Set<SolrConnector> connectors = new HashSet<SolrConnector>();
+        connectors.addAll(this.embeddedConnectorCache.values());
+        for (SolrConnector connector: connectors) connector.close();
         this.embeddedConnectorCache.clear();
         this.embeddedSolrInstance.close();
         this.embeddedSolrInstance = null;