Question

我使用Flash客户端和Netty 4.0.24服务器处理客户端 - 服务器应用程序。客户端通过XMLSocket与服务器通信。数据是JSON。一切正常。但是，当我开始对服务器进行压力测试时，数据有时会丢失。 JSON Parser抛出异常。我的服务器pipelne是：

ChannelPipeline pipeline=channel.pipeline();
pispeline.addLast("framer", new DelimiterBasedFrameDecoder(8192, Delimiters.nulDelimiter()));
pipeline.addLast(new LoggingHandler(LogLevel.DEBUG));
pipeline.addLast("EchoHandler", new EchoPipe());

在EchoPipe课程

public void channelRead(ChannelHandlerContext ctx, Object msg) throws ParseException {
    ByteBuf in = (ByteBuf) msg;
    String data =in.toString(io.netty.util.CharsetUtil.UTF_8); 
    DataProcessor.parser.reset();
    try{
    JSONObject obj = (JSONObject)DataProcessor.parser.parse(data.toString());                        
   ...
    } catch(ParseException ex){
       System.out.println(ex.toString());
       System.out.println("err_message: "+data);
    }

有时服务器会捕获ParseException。关于类似的数据。当我开始大约10个客户端连接时，会出现这种情况，每秒发送3次测试数据包...

异常的堆栈跟踪：

Unexpected token VALUE(viewer_type) at position 834.
at org.json.simple.parser.JSONParser.parse(JSONParser.java:146)
at org.json.simple.parser.JSONParser.parse(JSONParser.java:81)
at org.json.simple.parser.JSONParser.parse(JSONParser.java:75)
at frusrv.EchoPipe.channelRead(EchoPipe.java:52)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319)
at io.netty.handler.logging.LoggingHandler.channelRead(LoggingHandler.java:283)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319)
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:161)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319)
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:787)
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:130)
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511)
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116)
at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:137)
at java.lang.Thread.run(Thread.java:724)

堆栈跟踪的另一个时间是：

Unexpected token END OF FILE at position 834.
at org.json.simple.parser.JSONParser.parse(JSONParser.java:146)
at org.json.simple.parser.JSONParser.parse(JSONParser.java:81)
at org.json.simple.parser.JSONParser.parse(JSONParser.java:75)
at frusrv.EchoPipe.channelRead(EchoPipe.java:52)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319)
at io.netty.handler.logging.LoggingHandler.channelRead(LoggingHandler.java:283)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319)
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:161)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319)
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:787)
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:130)
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511)
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116)
at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:137)
at java.lang.Thread.run(Thread.java:724)

Netty服务器有时会丢失数据

0 个答案: