netty的LengthFieldBasedFrameDecoder 粘包问题

hhd715213471 2015-06-11 08:51:25

服务器定义解码器 super(4096, 0, 2, 0, 0);

客户端
正常情况：
String host = "127.0.0.1";
int port = 8586;
Socket client = new Socket(host, port);
DataOutputStream dos = new DataOutputStream(client.getOutputStream());

while (!client.isClosed()){
dos.writeShort(2); //输出总长度
dos.writeShort(0x0001); //命令
dos.flush();
Thread.sleep(3000);
}
dos.close();
client.close();

粘包情况:
String host = "127.0.0.1";
int port = 8586;
Socket client = new Socket(host, port);
DataOutputStream dos = new DataOutputStream(client.getOutputStream());

while (!client.isClosed()){
dos.writeShort(3); //输出总长度
dos.writeShort(0x0001); //命令
dos.writeShort(5); //命令
dos.flush();
Thread.sleep(3000);
}
dos.close();
client.close();
这样第一次发是没有问题的，第二次服务器就报错了，以下是错误信息:
io.netty.handler.codec.TooLongFrameException: Adjusted frame length exceeds 4096: 25346 - discarded
at io.netty.handler.codec.LengthFieldBasedFrameDecoder.fail(LengthFieldBasedFrameDecoder.java:501) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.handler.codec.LengthFieldBasedFrameDecoder.failIfNecessary(LengthFieldBasedFrameDecoder.java:477) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.handler.codec.LengthFieldBasedFrameDecoder.decode(LengthFieldBasedFrameDecoder.java:403) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]

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