fixed docker build

server/src/main/java/com/alibaba/otter/canal/server/embedded/CanalServerWithEmbedded.java

@@ -44,7 +44,6 @@ public class CanalServerWithEmbedded extends AbstractCanalLifeCycle implements C
     private Map<String, CanalInstance> canalInstances;
     // private Map<ClientIdentity, Position> lastRollbackPostions;
     private CanalInstanceGenerator     canalInstanceGenerator;
-    private int                        metricsPort;
     private CanalMetricsService        metrics          = NopCanalMetricsService.NOP;
 
     private static class SingletonHolder {
@@ -65,7 +64,6 @@ public class CanalServerWithEmbedded extends AbstractCanalLifeCycle implements C
             super.start();
             // 如果存在provider,则启动metrics service
             loadCanalMetrics();
-            metrics.setServerPort(metricsPort);
             metrics.initialize();
             canalInstances = MigrateMap.makeComputingMap(new Function<String, CanalInstance>() {
 
@@ -531,8 +529,4 @@ public class CanalServerWithEmbedded extends AbstractCanalLifeCycle implements C
         this.canalInstanceGenerator = canalInstanceGenerator;
     }
 
-    public void setMetricsPort(int metricsPort) {
-        this.metricsPort = metricsPort;
-    }
-
 }

server/src/main/java/com/alibaba/otter/canal/spi/CanalMetricsService.java

@@ -39,9 +39,4 @@ public interface CanalMetricsService {
      */
     void unregister(CanalInstance instance);
 
-    /**
-     * @param port server port for pull
-     */
-    void setServerPort(int port);
-
 }

server/src/main/java/com/alibaba/otter/canal/spi/NopCanalMetricsService.java

@@ -35,9 +35,4 @@ public class NopCanalMetricsService implements CanalMetricsService {
     public void unregister(CanalInstance instance) {
 
     }
-
-    @Override
-    public void setServerPort(int port) {
-
-    }
 }