We're getting lots of collisions storing MINUTES_ACTIVE stats. Be more verbose when this happens.

git-svn-id: svn+ssh://src.earth.threerings.net/vilya/trunk@736 c613c5cb-e716-0410-b11b-feb51c14d237

src/java/com/threerings/stats/server/persist/StatRecord.java

@@ -109,6 +109,12 @@ public class StatRecord extends PersistentRecord
         this.modCount = modCount;
     }
 
+    @Override
+    public String toString ()
+    {
+        return "playerId=" + playerId + " statCode=" + statCode + " modCount=" + modCount;
+    }
+
     // AUTO-GENERATED: METHODS START
     /**
      * Create and return a primary {@link Key} to identify a {@link #StatRecord}

src/java/com/threerings/stats/server/persist/StatRepository.java

@@ -292,6 +292,7 @@ public class StatRepository extends DepotRepository
             if (numRows == 0 && forceWrite) {
                 log.warning("Possible collision while storing StatRecord",
                             "playerId", playerId, "stat", stat.getType().name(),
+                            "modCount", nextModCount,
                             "overwriting", load(StatRecord.class, key));
                 store(new StatRecord(playerId, stat.getCode(), data, nextModCount));
                 numRows = 1;