Replace one more deprecated peerDeparture in Protocol.transferIndex()

by moving/using interfaceDeparture() in transferRWI()

source/net/yacy/peers/Protocol.java

@@ -1603,8 +1603,8 @@ public final class Protocol {
         Map<String, String> in = transferRWI(targetSeed, indexes, gzipBody, timeout);
 
         if ( in == null ) {
+            // targetSeed interface departure is already handled within transferRWI() for no response situation
             String errorCause = "no connection from transferRWI";
-            seeds.peerActions.peerDeparture(targetSeed, errorCause); // disconnect unavailable peer
             return errorCause;
         }
 
@@ -1665,13 +1665,25 @@ public final class Protocol {
         return null;
     }
 
+    /**
+     * Transfer Reverse Word Index entries to remote peer.
+     * If the used IP is not responding, this IP (interface) is removed from
+     * targtSeed IP list.
+     * Remote peer responds with list of unknown url hashes
+     *
+     * @param targetSeed
+     * @param indexes
+     * @param gzipBody
+     * @param timeout
+     * @return peer response or null if transfer failed
+     */
     private static Map<String, String> transferRWI(
         final Seed targetSeed,
         final ReferenceContainerCache<WordReference> indexes,
         boolean gzipBody,
         final int timeout) {
-        String ip = targetSeed.getIP();
-        if ( ip == null ) {
+        for (String ip : targetSeed.getIPs()) {
+            if (ip == null) {
                 Network.log.warn("no address for transferRWI");
                 return null;
             }
@@ -1713,7 +1725,6 @@ public final class Protocol {
                 parts.put("wordc", UTF8.StringBody(Integer.toString(indexes.size())));
                 parts.put("entryc", UTF8.StringBody(Integer.toString(indexcount)));
                 parts.put("indexes", UTF8.StringBody(entrypost.toString()));
-            // final byte[] content = HTTPConnector.getConnector(MultiProtocolURI.yacybotUserAgent).post(new MultiProtocolURI("http://" + address + "/yacy/transferRWI.html"), timeout, targetSeed.getHexHash() + ".yacyh", parts, gzipBody);
                 final HTTPClient httpClient = new HTTPClient(ClientIdentification.yacyInternetCrawlerAgent, timeout);
                 final byte[] content =
                         httpClient.POSTbytes(
@@ -1730,8 +1741,11 @@ public final class Protocol {
                 return result;
             } catch (final Exception e ) {
                 Network.log.info("yacyClient.transferRWI to " + address + " error: " + e.getMessage());
-            return null;
+                // disconnect unavailable peer ip
+                Switchboard.getSwitchboard().peers.peerActions.interfaceDeparture(targetSeed, ip);
+            }
         }
+        return null;
     }
 
     private static Map<String, String> transferURL(