diff --git a/packages/websocket/src/netty/websocket.ts b/packages/websocket/src/netty/websocket.ts
index aae1b61e..ca953528 100644
--- a/packages/websocket/src/netty/websocket.ts
+++ b/packages/websocket/src/netty/websocket.ts
@@ -4,11 +4,13 @@ export abstract class WebSocketHandlerAdapter {
     private _Handler;
     constructor() {
         let ChannelInboundHandlerAdapterImpl = Java.extend(ChannelInboundHandlerAdapter, {
-            channelRead: this.channelRead.bind(this)
+            channelRead: this.channelRead.bind(this),
+            exceptionCaught: this.exceptionCaught.bind(this)
         })
         this._Handler = new ChannelInboundHandlerAdapterImpl()
     }
     abstract channelRead(ctx: any, channel: any);
+    abstract exceptionCaught(ctx: any, cause: Error);
     getHandler() {
         return this._Handler;
     }
diff --git a/packages/websocket/src/server/client.ts b/packages/websocket/src/server/client.ts
index 91c1ac6c..0fa2f45d 100644
--- a/packages/websocket/src/server/client.ts
+++ b/packages/websocket/src/server/client.ts
@@ -1,6 +1,6 @@
 import { EventEmitter } from 'events'
 import { SocketIO } from 'socket-io/interfaces';
-import { Keys, AttributeKeys } from './constants';
+import { AttributeKeys } from './constants';
 
 const TextWebSocketFrame = Java.type('io.netty.handler.codec.http.websocketx.TextWebSocketFrame')
 
diff --git a/packages/websocket/src/server/index.ts b/packages/websocket/src/server/index.ts
index ee41c1b2..ed59a8f3 100644
--- a/packages/websocket/src/server/index.ts
+++ b/packages/websocket/src/server/index.ts
@@ -4,7 +4,7 @@ import { ServerEvent, Keys } from './constants'
 import { WebSocketDetect } from './websocket_detect'
 import { WebSocketHandler } from './websocket_handler'
 import { NettyClient } from './client'
-import { ServerOptions, Server } from '../socket-io'
+import { ServerOptions } from '../socket-io'
 
 class NettyWebSocketServer extends EventEmitter {
     private pipeline: any;
diff --git a/packages/websocket/src/server/websocket_detect.ts b/packages/websocket/src/server/websocket_detect.ts
index 620be384..db5edc49 100644
--- a/packages/websocket/src/server/websocket_detect.ts
+++ b/packages/websocket/src/server/websocket_detect.ts
@@ -11,4 +11,7 @@ export class WebSocketDetect extends WebSocketHandlerAdapter {
     channelRead(ctx: any, channel: any) {
         this.event.emit(ServerEvent.detect, ctx, channel);
     }
+    exceptionCaught(ctx: any, cause: Error) {
+        this.event.emit(ServerEvent.error, ctx, cause);
+    }
 }
diff --git a/packages/websocket/src/server/websocket_handler.ts b/packages/websocket/src/server/websocket_handler.ts
index 02d7b8b8..886048f7 100644
--- a/packages/websocket/src/server/websocket_handler.ts
+++ b/packages/websocket/src/server/websocket_handler.ts
@@ -1,6 +1,6 @@
 import { EventEmitter } from 'events'
 
-import { Keys } from './constants'
+import { Keys, ServerEvent } from './constants'
 import { WebSocketHandlerAdapter } from "../netty"
 import { HttpRequestHandler } from './httprequest'
 import { TextWebSocketFrameHandler } from './text_websocket_frame'
@@ -40,4 +40,7 @@ export class WebSocketHandler extends WebSocketHandlerAdapter {
         msg.resetReaderIndex()
         ctx.fireChannelRead(msg)
     }
+    exceptionCaught(ctx: any, cause: Error) {
+        this.options.event.emit(ServerEvent.error, ctx, cause)
+    }
 }
diff --git a/packages/websocket/src/socket-io/index.ts b/packages/websocket/src/socket-io/index.ts
index 33d2d2e7..efd1e641 100644
--- a/packages/websocket/src/socket-io/index.ts
+++ b/packages/websocket/src/socket-io/index.ts
@@ -17,12 +17,6 @@ interface ServerOptions extends SocketIO.ServerOptions {
     root?: string;
 }
 
-const defaultOptions: ServerOptions = {
-    event: new EventEmitter(),
-    path: '/socket.io',
-    root: root + '/wwwroot'
-}
-
 class Server implements SocketIO.Server {
     private nettyServer: NettyWebSocketServer;
     private allClients: { [key: string]: Client };
@@ -43,7 +37,11 @@ class Server implements SocketIO.Server {
         this.nsps = {};
         this.sockets = new Namespace('/', this);
         this.nsps['/'] = this.sockets;
-        this.initNettyServer(pipeline, Object.assign(defaultOptions, options));
+        this.initNettyServer(pipeline, Object.assign({
+            event: new EventEmitter(),
+            path: '/socket.io',
+            root: root + '/wwwroot'
+        }, options));
     }
 
     checkRequest(req: any, fn: (err: any, success: boolean) => void): void {
diff --git a/packages/websocket/src/socket-io/parser.ts b/packages/websocket/src/socket-io/parser.ts
index 871ad489..44df4cc7 100644
--- a/packages/websocket/src/socket-io/parser.ts
+++ b/packages/websocket/src/socket-io/parser.ts
@@ -39,10 +39,10 @@ export class Parser {
                 return '4"encode error"'
             }
         }
-        console.debug(`encoded ${origin} as ${str}`);
+        console.trace(`encoded ${origin} as ${str}`);
         return str;
     }
-    tryStringify(str) {
+    tryStringify(str: any) {
         try {
             return JSON.stringify(str);
         } catch (e) {
@@ -136,11 +136,11 @@ export class Parser {
             }
         }
 
-        console.debug(`decoded ${str} as ${JSON.stringify(p)}`);
+        console.trace(`decoded ${str} as ${JSON.stringify(p)}`);
         return p;
     }
 
-    tryParse(str) {
+    tryParse(str: string) {
         try {
             return JSON.parse(str);
         } catch (e) {