diff --git a/jaeger-core/src/main/java/io/jaegertracing/Configuration.java b/jaeger-core/src/main/java/io/jaegertracing/Configuration.java
index 99d761f28..c05b3b5a8 100644
--- a/jaeger-core/src/main/java/io/jaegertracing/Configuration.java
+++ b/jaeger-core/src/main/java/io/jaegertracing/Configuration.java
@@ -181,10 +181,6 @@ public enum Propagation {
   private Map<String, String> tracerTags;
   private boolean useTraceId128Bit;
 
-  /**
-   * lazy singleton JaegerTracer initialized in getTracer() method.
-   */
-  private JaegerTracer tracer;
 
   public Configuration(String serviceName) {
     this.serviceName = JaegerTracer.Builder.checkValidServiceName(serviceName);
@@ -240,22 +236,11 @@ protected JaegerTracer.Builder createTracerBuilder(String serviceName) {
   }
 
   public synchronized JaegerTracer getTracer() {
-    if (tracer != null) {
-      return tracer;
-    }
-
-    tracer = getTracerBuilder().build();
+    JaegerTracer tracer = getTracerBuilder().build();
     log.info("Initialized tracer={}", tracer);
-
     return tracer;
   }
 
-  public synchronized void closeTracer() {
-    if (tracer != null) {
-      tracer.close();
-    }
-  }
-
   private MetricsFactory loadMetricsFactory() {
     ServiceLoader<MetricsFactory> loader = ServiceLoader.load(MetricsFactory.class);
 
@@ -615,11 +600,6 @@ public SenderConfiguration getSenderConfiguration() {
    */
   @Getter
   public static class SenderConfiguration {
-    /**
-     * A custom sender set by our consumers. If set, nothing else has effect. Optional.
-     */
-    private Sender sender;
-
     /**
      * The Agent Host. Has no effect if the sender is set. Optional.
      */
@@ -684,15 +664,11 @@ public SenderConfiguration withAuthPassword(String password) {
     }
 
     /**
-     * Returns a sender if one was given when creating the configuration, or attempts to create a sender based on the
-     * configuration's state.
+     * Returns a sender based on the configuration's state.
      * @return the sender passed via the constructor or a properly configured sender
      */
     public Sender getSender() {
-      if (sender == null) {
-        sender = SenderResolver.resolve(this);
-      }
-      return sender;
+      return SenderResolver.resolve(this);
     }
 
     /**
diff --git a/jaeger-core/src/test/java/io/jaegertracing/ConfigurationTest.java b/jaeger-core/src/test/java/io/jaegertracing/ConfigurationTest.java
index 6e0a1ab7a..fe8bbbcec 100644
--- a/jaeger-core/src/test/java/io/jaegertracing/ConfigurationTest.java
+++ b/jaeger-core/src/test/java/io/jaegertracing/ConfigurationTest.java
@@ -334,9 +334,12 @@ public void testOverrideServiceName() {
   @Test
   public void testDefaultTracer() {
     Configuration configuration = new Configuration("name");
-    assertNotNull(configuration.getTracer());
-    assertNotNull(configuration.getTracer());
-    configuration.closeTracer();
+    JaegerTracer tracer = configuration.getTracer();
+    assertNotNull(tracer);
+    tracer.close();
+    tracer = configuration.getTracer();
+    assertNotNull(tracer);
+    tracer.close();
   }
 
   @Test(expected = IllegalStateException.class)
diff --git a/jaeger-core/src/test/java/io/jaegertracing/internal/JaegerSubclassTest.java b/jaeger-core/src/test/java/io/jaegertracing/internal/JaegerSubclassTest.java
index 661b579a4..cb6dd2e70 100644
--- a/jaeger-core/src/test/java/io/jaegertracing/internal/JaegerSubclassTest.java
+++ b/jaeger-core/src/test/java/io/jaegertracing/internal/JaegerSubclassTest.java
@@ -172,6 +172,6 @@ public void testTracer() {
       Assert.assertTrue(tracer.scopeManager().activeSpan() instanceof CustomSpan);
       Assert.assertTrue(tracer.scopeManager().activeSpan().context() instanceof CustomSpanContext);
     }
-    config.closeTracer();
+    tracer.close();
   }
 }
diff --git a/jaeger-crossdock/src/main/java/io/jaegertracing/crossdock/JerseyServer.java b/jaeger-crossdock/src/main/java/io/jaegertracing/crossdock/JerseyServer.java
index 28c03442b..1eb4a6649 100644
--- a/jaeger-crossdock/src/main/java/io/jaegertracing/crossdock/JerseyServer.java
+++ b/jaeger-crossdock/src/main/java/io/jaegertracing/crossdock/JerseyServer.java
@@ -22,6 +22,7 @@
 import io.jaegertracing.crossdock.resources.behavior.http.EndToEndBehaviorResource;
 import io.jaegertracing.crossdock.resources.behavior.http.TraceBehaviorResource;
 import io.jaegertracing.crossdock.resources.health.HealthResource;
+import io.jaegertracing.internal.JaegerTracer;
 import io.jaegertracing.internal.samplers.ConstSampler;
 import io.jaegertracing.spi.Sender;
 import io.jaegertracing.thrift.internal.senders.HttpSender;
@@ -59,17 +60,17 @@ public class JerseyServer {
 
   private final HttpServer server;
 
-  private final Configuration config;
+  private final JaegerTracer tracer;
 
-  public JerseyServer(String host, int port, Configuration configuration, List<Object> resources)
+  public JerseyServer(String host, int port, JaegerTracer tracer, List<Object> resources)
       throws IOException {
-    this.config = configuration;
+    this.tracer = tracer;
 
     // create a resource config that scans for JAX-RS resources and providers
     final ResourceConfig rc = new ResourceConfig();
 
     resources.forEach(rc::register);
-    rc.register(new ServerTracingDynamicFeature.Builder(config.getTracer())
+    rc.register(new ServerTracingDynamicFeature.Builder(tracer)
           .withTraceSerialization(false)
           .build())
         .register(LoggingFilter.class)
@@ -84,7 +85,7 @@ public JerseyServer(String host, int port, Configuration configuration, List<Obj
 
     server = HttpServer.createSimpleServer(".", host, port);
     context.deploy(server);
-    client = initializeClient(config);
+    client = initializeClient(tracer);
     server.start();
   }
 
@@ -92,10 +93,10 @@ public void addNetworkListener(NetworkListener networkListener) {
     server.addListener(networkListener);
   }
 
-  private static Client initializeClient(final Configuration config) {
+  private static Client initializeClient(final JaegerTracer tracer) {
     return ClientBuilder.newClient()
         .register(ExceptionMapper.class)
-        .register(new ClientTracingFeature.Builder(config.getTracer()).build())
+        .register(new ClientTracingFeature.Builder(tracer).build())
         .register(JacksonFeature.class);
   }
 
@@ -109,7 +110,7 @@ public void shutdown() throws ExecutionException, InterruptedException {
   }
 
   public Tracer getTracer() {
-    return config.getTracer();
+    return tracer;
   }
 
   public static void main(String[] args) throws Exception {
@@ -119,9 +120,9 @@ public static void main(String[] args) throws Exception {
     Configuration configuration = new Configuration(serviceName)
         .withSampler(new SamplerConfiguration().withType(ConstSampler.TYPE).withParam(0))
         .withReporter(new ReporterConfiguration().withLogSpans(true));
-
-    JerseyServer server = new JerseyServer("0.0.0.0", 8081, configuration,
-        Arrays.asList(new TraceBehaviorResource(configuration.getTracer()),
+    JaegerTracer tracer = configuration.getTracer();
+    JerseyServer server = new JerseyServer("0.0.0.0", 8081, tracer,
+        Arrays.asList(new TraceBehaviorResource(tracer),
             new EndToEndBehaviorResource(new EndToEndBehavior(getEvn(SAMPLING_HOST_PORT, "jaeger-agent:5778"),
                 "crossdock-" + serviceName,
                 senderFromEnv(getEvn(COLLECTOR_HOST_PORT, "jaeger-collector:14268"),
diff --git a/jaeger-crossdock/src/test/java/io/jaegertracing/crossdock/resources/behavior/http/TraceBehaviorResourceTest.java b/jaeger-crossdock/src/test/java/io/jaegertracing/crossdock/resources/behavior/http/TraceBehaviorResourceTest.java
index 23b386913..d80260e7f 100644
--- a/jaeger-crossdock/src/test/java/io/jaegertracing/crossdock/resources/behavior/http/TraceBehaviorResourceTest.java
+++ b/jaeger-crossdock/src/test/java/io/jaegertracing/crossdock/resources/behavior/http/TraceBehaviorResourceTest.java
@@ -30,6 +30,7 @@
 import io.jaegertracing.crossdock.api.TraceResponse;
 import io.jaegertracing.crossdock.resources.behavior.TraceBehavior;
 import io.jaegertracing.internal.JaegerSpanContext;
+import io.jaegertracing.internal.JaegerTracer;
 import io.jaegertracing.internal.samplers.ConstSampler;
 import io.opentracing.Scope;
 import io.opentracing.Span;
@@ -87,8 +88,9 @@ public void setUp() throws Exception {
     Configuration configuration = new Configuration(SERVICE_NAME).withSampler(
         new SamplerConfiguration().withType(ConstSampler.TYPE).withParam(0))
         .withReporter(new ReporterConfiguration().withLogSpans(true));
-    server = new JerseyServer("127.0.0.1", port, configuration,
-        Collections.singletonList(new TraceBehaviorResource(configuration.getTracer())));
+    JaegerTracer tracer = configuration.getTracer();
+    server = new JerseyServer("127.0.0.1", port, tracer,
+        Collections.singletonList(new TraceBehaviorResource(tracer)));
     hostPort = String.format("127.0.0.1:%d", port);
     behavior = new TraceBehavior(server.getTracer());
   }