made multiple connector default

htroot/IndexFederated_p.java

@@ -39,8 +39,8 @@ import net.yacy.cora.storage.ConfigurationSet;
 import net.yacy.kelondro.logging.Log;
 import net.yacy.search.Switchboard;
 import net.yacy.search.index.Segments;
-import net.yacy.search.index.SolrField;
 import net.yacy.search.index.SolrConfiguration;
+import net.yacy.search.index.SolrField;
 import de.anomic.server.serverObjects;
 import de.anomic.server.serverSwitch;
 
@@ -93,7 +93,7 @@ public class IndexFederated_p {
                 // switch on
                 final boolean usesolr = sb.getConfigBool("federated.service.solr.indexing.enabled", false) & solrurls.length() > 0;
                 try {
-                    sb.indexSegments.segment(Segments.Process.LOCALCRAWLING).connectSolr((usesolr) ? new SolrShardingConnector(solrurls, SolrShardingSelection.Method.MODULO_HOST_MD5, 10000) : null);
+                    sb.indexSegments.segment(Segments.Process.LOCALCRAWLING).connectSolr((usesolr) ? new SolrShardingConnector(solrurls, SolrShardingSelection.Method.MODULO_HOST_MD5, 10000, true) : null);
                 } catch (final IOException e) {
                     Log.logException(e);
                     sb.indexSegments.segment(Segments.Process.LOCALCRAWLING).connectSolr(null);

source/net/yacy/cora/services/federated/solr/SolrShardingConnector.java

@@ -44,12 +44,14 @@ public class SolrShardingConnector implements SolrConnector {
     private final SolrShardingSelection sharding;
     private final String[] urls;
 
-    public SolrShardingConnector(final String urlList, final SolrShardingSelection.Method method, final long timeout) throws IOException {
+    public SolrShardingConnector(final String urlList, final SolrShardingSelection.Method method, final long timeout, boolean multipleConnections) throws IOException {
         urlList.replace(' ', ',');
         this.urls = urlList.split(",");
         this.connectors = new ArrayList<SolrConnector>();
+        SolrConnector s;
         for (final String u: this.urls) {
-            this.connectors.add(new SolrRetryConnector(new SolrSingleConnector(u.trim()), timeout));
+            s = multipleConnections ? new SolrMultipleConnector(u.trim(), 2) : new SolrSingleConnector(u.trim());
+            this.connectors.add(new SolrRetryConnector(s, timeout));
         }
         this.sharding = new SolrShardingSelection(method, this.urls.length);
     }

source/net/yacy/search/Switchboard.java

@@ -656,7 +656,7 @@ public final class Switchboard extends serverSwitch
                 (usesolr) ? new SolrShardingConnector(
                     solrurls,
                     SolrShardingSelection.Method.MODULO_HOST_MD5,
-                    10000) : null);
+                    10000, true) : null);
         } catch ( final IOException e ) {
             Log.logException(e);
             this.indexSegments.segment(Segments.Process.LOCALCRAWLING).connectSolr(null);