fixes to internal RWI usage if RWI is switched off (NPE etc)

source/net/yacy/peers/Protocol.java

@@ -1122,11 +1122,12 @@ public final class Protocol
 
         // evaluate result
         List<URIMetadataNode> container = new ArrayList<URIMetadataNode>();
-		if (docList.size() == 0) {
+		if (docList == null || docList.size() == 0) {
 		    Network.log.logInfo("SEARCH (solr), returned 0 out of " + docList.getNumFound() + " documents from " + (target == null ? "shard" : ("peer " + target.hash + ":" + target.getName())) + " query = " + solrQuery.toString()) ;
-		} else {// create containers
-            Network.log.logInfo("SEARCH (solr), returned " + docList.size() + " out of " + docList.getNumFound() + " documents from " + (target == null ? "shard" : ("peer " + target.hash + ":" + target.getName()))) ;
+		    return 0;
+		}
 		
+        Network.log.logInfo("SEARCH (solr), returned " + docList.size() + " out of " + docList.getNumFound() + " documents from " + (target == null ? "shard" : ("peer " + target.hash + ":" + target.getName())));
         int term = count;
         for (final SolrDocument doc: docList) {
             if ( term-- <= 0 ) {
@@ -1192,7 +1193,6 @@ public final class Protocol
             event.addExpectedRemoteReferences(-count);
             Network.log.logInfo("remote search (solr): peer " + target.getName() + " sent " + container.get(0).size() + "/" + docList.size() + " references");
         }
-		}
         return docList.size();
     }
 

source/net/yacy/search/query/RankingProcess.java

@@ -197,6 +197,8 @@ public final class RankingProcess extends Thread {
     @Override
     public void run() {
 
+        if (query.getSegment().termIndex() == null) return; // nothing to do; this index is not used
+        
         // do a search
         oneFeederStarted();
 

source/net/yacy/search/query/SearchEvent.java

@@ -224,7 +224,7 @@ public final class SearchEvent {
         // start a local RWI search concurrently
         if (this.remote || this.peers.mySeed().getBirthdate() < noRobinsonLocalRWISearch) {
             // we start the local search only if this peer is doing a remote search or when it is doing a local search and the peer is old
-            this.rankingProcess.start();
+            if (query.getSegment().connectedRWI()) this.rankingProcess.start();
         }
 
         if (this.remote) {
@@ -270,7 +270,7 @@ public final class SearchEvent {
             if ( generateAbstracts ) {
                 // we need the results now
                 try {
-                    this.rankingProcess.join();
+                    if (query.getSegment().connectedRWI()) this.rankingProcess.join();
                 } catch ( final Throwable e ) {
                 }
                 // compute index abstracts
@@ -278,7 +278,7 @@ public final class SearchEvent {
                 int maxcount = -1;
                 long mindhtdistance = Long.MAX_VALUE, l;
                 byte[] wordhash;
-                assert this.rankingProcess.searchContainerMap() != null;
+                assert !query.getSegment().connectedRWI() || this.rankingProcess.searchContainerMap() != null;
                 if (this.rankingProcess.searchContainerMap() != null) {
                     for (final Map.Entry<byte[], ReferenceContainer<WordReference>> entry : this.rankingProcess.searchContainerMap().entrySet()) {
                         wordhash = entry.getKey();
@@ -303,7 +303,7 @@ public final class SearchEvent {
                 // give process time to accumulate a certain amount of data
                 // before a reading process wants to get results from it
                 try {
-                    this.rankingProcess.join(100);
+                    if (query.getSegment().connectedRWI()) this.rankingProcess.join(100);
                 } catch ( final Throwable e ) {
                 }
                 // this will reduce the maximum waiting time until results are available to 100 milliseconds