- Added logging for the port that the profiler server successfully

  starts up on
- Corrected the error recording to drop the oldest errors when at
  capacity.

src/main/java/com/etsy/statsd/profiler/server/ProfilerServer.java

@@ -12,13 +12,16 @@
 import java.util.Map;
 import java.util.concurrent.ScheduledFuture;
 import java.util.concurrent.atomic.AtomicReference;
+import java.util.logging.Level;
+import java.util.logging.Logger;
 
 /**
  * Sets up a simple embedded HTTP server for interacting with the profiler while it runs
  *
  * @author Andrew Johnson
  */
 public class ProfilerServer {
+    private static final Logger log = Logger.getLogger(ProfilerServer.class.getName());
     private static final Vertx vertx = VertxFactory.newVertx();
 
     /**
@@ -36,6 +39,8 @@ public void handle(AsyncResult<HttpServer> event) {
                 if (event.failed()) {
                     server.close();
                     startServer(runningProfilers, activeProfilers, port + 1, isRunning, errors);
+                } else if (event.succeeded()) {
+                    log.info("Profiler server started on port " + port);
                 }
             }
         });

src/main/java/com/etsy/statsd/profiler/worker/ProfilerWorkerThread.java

@@ -30,7 +30,7 @@ public void run() {
             e.printStackTrace(pw);
             errors.add(String.format("Received an error running profiler: %s, error: %s", profiler.getClass().getName(), sw.toString()));
             if ( errors.size() > 10) {
-                errors.pollLast();
+                errors.pollFirst();
             }
         }
     }