default configuration of MMapDirectoryFactory for solr, increased lock

timeout, less documents from remote searches (too many results had
easily blocked a peer)

defaults/solr/solrconfig.xml

@@ -133,7 +133,7 @@
          <filter class="solr.LimitTokenCountFilterFactory" maxTokenCount="10000"/>
          -->
         <!-- Maximum time to wait for a write lock (ms) for an IndexWriter. Default: 1000 -->
-        <!-- <writeLockTimeout>1000</writeLockTimeout>  -->
+        <writeLockTimeout>20000</writeLockTimeout>
         
         <!-- Expert: Enabling compound file will use less files for the index,
          using fewer file descriptors on the expense of performance decrease.

defaults/yacy.init

@@ -803,7 +803,7 @@ search.excludehosth=
 search.verify.delete = true
 
 # remote search details
-remotesearch.maxcount = 20
+remotesearch.maxcount = 10
 remotesearch.maxtime = 1000
 
 # specifies if yacy should set it's own referer if no referer URL

source/net/yacy/yacy.java

@@ -623,6 +623,7 @@ public final class yacy {
 	        if (args.length >= 1 && args[0].toLowerCase().equals("-gui")) headless = false;
 	        System.setProperty("java.awt.headless", headless ? "true" : "false");
             System.setProperty("java.net.preferIPv4Stack", "true");
+            System.setProperty("solr.directoryFactory","solr.MMapDirectoryFactory"); // should prevent ClosedChannelException
 
 	        String s = ""; for (final String a: args) s += a + " ";
 	        yacyRelease.startParameter = s.trim();