improve error message to aid debug


git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@989113 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/sigil/common/obr/src/org/apache/felix/sigil/common/obr/OBRRepositoryProvider.java b/sigil/common/obr/src/org/apache/felix/sigil/common/obr/OBRRepositoryProvider.java
index c073afc..535e8b7 100644
--- a/sigil/common/obr/src/org/apache/felix/sigil/common/obr/OBRRepositoryProvider.java
+++ b/sigil/common/obr/src/org/apache/felix/sigil/common/obr/OBRRepositoryProvider.java
@@ -81,7 +81,7 @@
         }
         catch (IOException e)
         {
-            throw new RepositoryException("Invalid repository url", e);
+            throw new RepositoryException(id + ": invalid repository url:" + urlStr, e);
         }
     }
 }