HTRACE-258. Add "created Tracer..." log at trace level to Tracer.java (cmccabe)
diff --git a/htrace-core/src/main/java/org/apache/htrace/core/Tracer.java b/htrace-core/src/main/java/org/apache/htrace/core/Tracer.java
index 2a6d31e..39d972d 100644
--- a/htrace-core/src/main/java/org/apache/htrace/core/Tracer.java
+++ b/htrace-core/src/main/java/org/apache/htrace/core/Tracer.java
@@ -161,6 +161,9 @@
           samplers.toArray(new Sampler[samplers.size()]));
       tracerPool.addTracer(tracer);
       loadSpanReceivers();
+      if (LOG.isTraceEnabled()) {
+        LOG.trace("Created " + tracer + " for " + name);
+      }
       return tracer;
     }
   }