do not store failure of loading of robots.txt into the index as a fail

document

source/net/yacy/crawler/robots/RobotsTxt.java

@@ -56,6 +56,7 @@ public class RobotsTxt {
 
     private final static ConcurrentLog log = new ConcurrentLog(RobotsTxt.class.getName());
 
+    protected static final String ROBOTS_TXT_PATH = "/robots.txt";
     protected static final String ROBOTS_DB_PATH_SEPARATOR = ";";
     protected static final Pattern ROBOTS_DB_PATH_SEPARATOR_MATCHER = Pattern.compile(ROBOTS_DB_PATH_SEPARATOR);
 
@@ -338,6 +339,10 @@ public class RobotsTxt {
         return sb.toString();
     }
     
+    public static boolean isRobotsURL(MultiProtocolURL url) {
+        return url.getPath().equals(ROBOTS_TXT_PATH);
+    }
+    
     /**
      * generate a robots.txt url.
      * @param urlHostPort a string of the form <host>':'<port> or just <host>
@@ -347,7 +352,7 @@ public class RobotsTxt {
         if (urlHostPort.endsWith(":80")) urlHostPort = urlHostPort.substring(0, urlHostPort.length() - 3);
         DigestURL robotsURL = null;
         try {
-            robotsURL = new DigestURL((urlHostPort.endsWith(":443") ? "https://" : "http://") + urlHostPort + "/robots.txt");
+            robotsURL = new DigestURL((urlHostPort.endsWith(":443") ? "https://" : "http://") + urlHostPort + ROBOTS_TXT_PATH);
         } catch (final MalformedURLException e) {
             log.severe("Unable to generate robots.txt URL for host:port '" + urlHostPort + "'.", e);
             robotsURL = null;

source/net/yacy/search/index/ErrorCache.java

@@ -41,6 +41,7 @@ import net.yacy.cora.federate.solr.FailCategory;
 import net.yacy.cora.federate.solr.connector.AbstractSolrConnector;
 import net.yacy.cora.util.ConcurrentLog;
 import net.yacy.crawler.data.CrawlProfile;
+import net.yacy.crawler.robots.RobotsTxt;
 import net.yacy.search.index.Fulltext;
 import net.yacy.search.schema.CollectionConfiguration;
 import net.yacy.search.schema.CollectionSchema;
@@ -109,7 +110,7 @@ public class ErrorCache {
                 url, profile == null ? null : profile.collections(),
                 failCategory.name() + " " + reason, failCategory.failType,
                 httpcode, crawldepth);
-        if (this.fulltext.getDefaultConnector() != null && failCategory.store) {
+        if (this.fulltext.getDefaultConnector() != null && failCategory.store && !RobotsTxt.isRobotsURL(url)) {
             // send the error to solr
             try {
                 // do not overwrite error reports with error reports
@@ -123,13 +124,9 @@ public class ErrorCache {
             } catch (final IOException e) {
                 ConcurrentLog.warn("SOLR", "failed to send error " + url.toNormalform(true) + " to solr: " + e.getMessage());
             }
-            synchronized (this.cache) {
-                this.cache.put(ASCII.String(url.hash()), null);
-            }
-        } else {
-            synchronized (this.cache) {
-                this.cache.put(ASCII.String(url.hash()), failDoc);
-            }
+        }
+        synchronized (this.cache) {
+            this.cache.put(ASCII.String(url.hash()), failDoc);
         }
         checkStackSize();
     }