diff --git a/source/net/yacy/cora/federate/solr/connector/SolrServerConnector.java b/source/net/yacy/cora/federate/solr/connector/SolrServerConnector.java
index 736cf942e..1610c8e3c 100644
--- a/source/net/yacy/cora/federate/solr/connector/SolrServerConnector.java
+++ b/source/net/yacy/cora/federate/solr/connector/SolrServerConnector.java
@@ -351,6 +351,10 @@ public abstract class SolrServerConnector extends AbstractSolrConnector implemen
             if (useluke == -1) return getSizeQueryRequest();
             long ls = getSizeLukeRequest();
             long qs = getSizeQueryRequest();
+            if (ls == 0 && qs == 0) {
+                // we don't know if this is caused by an error or not; don't change the useluke value
+                return 0;
+            }
             if (ls == qs) {
                 useluke = 1;
                 return ls;
diff --git a/source/net/yacy/document/parser/apkParser.java b/source/net/yacy/document/parser/apkParser.java
index b436554fd..c1a2969d9 100644
--- a/source/net/yacy/document/parser/apkParser.java
+++ b/source/net/yacy/document/parser/apkParser.java
@@ -35,7 +35,6 @@ import javax.xml.transform.TransformerFactory;
 import javax.xml.transform.dom.DOMSource;
 import javax.xml.transform.stream.StreamResult;
 
-import org.w3c.dom.Attr;
 import org.w3c.dom.Element;
 
 import net.yacy.cora.document.id.AnchorURL;