Java 无法通过的网络大消息。已更改的事件引发了两次

我有一个服务器在处理Netty。客户端发送一些握手消息，服务器回复。这些都是小消息，没有任何问题

但是，当服务器尝试发送一些大消息（每个131139字节）时，它们似乎已被发送，

ChannelFuture

的

issucess（）

返回

true

和

getCause（）

返回

null

。但是，客户端从未获得完整消息，只有第一条消息的第一个

4097

字节。在4或5条消息之后，netty停止尝试发送新消息

在发送消息之前，我正在阅读频道的

iswriteable（）

（它总是返回

true

）。仅当

ChannelFutureListener

的

operationComplete

被触发时，才会尝试下一条消息。消息写入频道后，日志显示“兴趣更改”事件被抛出两次，

isWritable

更改为

false

，然后立即更改为

true

。但是消息从未到达客户机

 INFO [New I/O worker #7] (HashSender.java:33) - Attempting send a message: 0
 INFO [New I/O worker #7] (HashSender.java:68) - Is channel writable: true
 INFO [New I/O worker #7] (FrameLengthPrepender.java:46) - outgoing packet lenght: 131139
 INFO [New I/O worker #7] (ClientHandler.java:32) - [id: 0xdbb48b90, /192.168.0.3:60105 => /192.168.0.4:25025] INTEREST_CHANGED
 INFO [New I/O worker #7] (ClientHandler.java:33) - Is channel writable: true
 INFO [New I/O worker #7] (HashSender.java:16) - Message Successfully sent. Channel isDone: true, success: true, cancelled: false, error: null
 INFO [New I/O worker #7] (HashSender.java:33) - Attempting send a message: 1
 INFO [New I/O worker #7] (HashSender.java:68) - Is channel writable: true
 INFO [New I/O worker #7] (FrameLengthPrepender.java:46) - outgoing packet lenght: 131139
 INFO [New I/O worker #7] (ClientHandler.java:32) - [id: 0xdbb48b90, /192.168.0.3:60105 => /192.168.0.4:25025] INTEREST_CHANGED
 INFO [New I/O worker #7] (ClientHandler.java:33) - Is channel writable: false
 INFO [New I/O worker #7] (ClientHandler.java:32) - [id: 0xdbb48b90, /192.168.0.3:60105 => /192.168.0.4:25025] INTEREST_CHANGED
 INFO [New I/O worker #7] (ClientHandler.java:33) - Is channel writable: true
 INFO [New I/O worker #7] (HashSender.java:16) - Message Successfully sent. Channel isDone: true, success: true, cancelled: false, error: null
 INFO [New I/O worker #7] (HashSender.java:33) - Attempting send a message: 2
 INFO [New I/O worker #7] (HashSender.java:68) - Is channel writable: true
 INFO [New I/O worker #7] (FrameLengthPrepender.java:46) - outgoing packet lenght: 131139
 INFO [New I/O worker #7] (ClientHandler.java:32) - [id: 0xdbb48b90, /192.168.0.3:60105 => /192.168.0.4:25025] INTEREST_CHANGED
 INFO [New I/O worker #7] (ClientHandler.java:33) - Is channel writable: false
 INFO [New I/O worker #7] (ClientHandler.java:32) - [id: 0xdbb48b90, /192.168.0.3:60105 => /192.168.0.4:25025] INTEREST_CHANGED
 INFO [New I/O worker #7] (ClientHandler.java:33) - Is channel writable: true
 INFO [New I/O worker #7] (HashSender.java:16) - Message Successfully sent. Channel isDone: true, success: true, cancelled: false, error: null
 INFO [New I/O worker #7] (HashSender.java:33) - Attempting send a message: 3
 INFO [New I/O worker #7] (HashSender.java:68) - Is channel writable: true
 INFO [New I/O worker #7] (FrameLengthPrepender.java:46) - outgoing packet lenght: 131139
 INFO [New I/O worker #7] (ClientHandler.java:32) - [id: 0xdbb48b90, /192.168.0.3:60105 => /192.168.0.4:25025] INTEREST_CHANGED
 INFO [New I/O worker #7] (ClientHandler.java:33) - Is channel writable: false
 INFO [New I/O worker #7] (ClientHandler.java:32) - [id: 0xdbb48b90, /192.168.0.3:60105 => /192.168.0.4:25025] INTEREST_CHANGED
 INFO [New I/O worker #7] (ClientHandler.java:33) - Is channel writable: true
 INFO [New I/O worker #7] (HashSender.java:16) - Message Successfully sent. Channel isDone: true, success: true, cancelled: false, error: null
 INFO [New I/O worker #7] (HashSender.java:33) - Attempting send a message: 4
 INFO [New I/O worker #7] (HashSender.java:68) - Is channel writable: true
 INFO [New I/O worker #7] (FrameLengthPrepender.java:46) - outgoing packet lenght: 131139
 INFO [New I/O worker #7] (ClientHandler.java:32) - [id: 0xdbb48b90, /192.168.0.3:60105 => /192.168.0.4:25025] INTEREST_CHANGED
 INFO [New I/O worker #7] (ClientHandler.java:33) - Is channel writable: false
 INFO [New I/O worker #7] (ClientHandler.java:32) - [id: 0xdbb48b90, /192.168.0.3:60105 => /192.168.0.4:25025] INTEREST_CHANGED
 INFO [New I/O worker #7] (ClientHandler.java:33) - Is channel writable: true
 INFO [New I/O worker #7] (HashSender.java:16) - Message Successfully sent. Channel isDone: true, success: true, cancelled: false, error: null
 INFO [New I/O worker #7] (HashSender.java:33) - Attempting send a message: 5
 INFO [New I/O worker #7] (HashSender.java:68) - Is channel writable: true
 INFO [New I/O worker #7] (FrameLengthPrepender.java:46) - outgoing packet lenght: 131139
 INFO [New I/O worker #7] (ClientHandler.java:32) - [id: 0xdbb48b90, /192.168.0.3:60105 => /192.168.0.4:25025] INTEREST_CHANGED
 INFO [New I/O worker #7] (ClientHandler.java:33) - Is channel writable: false

有人能告诉我为什么这些信息没有通过吗

---

更新：它实际上是第一条消息的4097字节。我没有计算标记数据包长度的前4个字节。

---

更新：如果传出数据包长度小于或等于4097字节，则所有操作都会顺利进行。只有当数据包大于4097字节时，Netty才会中断。是4097，不是4096。它响了吗？

好的，我的错。问题出在客户端。读取套接字的线程上有一个无限循环，因此传入的数据没有被处理。

频道兴趣更改事件无需担心。Netty3.x为每个通道维护一个具有高水位线的内部写入缓冲区。这表示等待刷新到操作系统缓冲区的数据量。如果未完成数据超过此值，则通道设置为不可写。默认值为64K，因此您的大消息会立即触发频道兴趣更改事件。然后，一旦数据被刷新到系统缓冲区，Netty将通道设置为可写。我想这信息已经发出了。你能提供客户的详细信息吗？客户机是用C++编写的。这是一个非常成熟的代码，我正在重新编写服务器（它最初是阻塞的，而不是异步的）。我敢肯定，每当发送大型消息时，客户端只会收到第一条消息的前4093字节。更新：实际上是第一条消息的4097字节。我没有计算标记数据包长度的前4个字节。我又做了一些实验，发现如果输出数据包长度小于或等于4097字节，一切都会顺利进行。只有当数据包大于4097字节时，Netty才会中断。是4097，不是4096。它响了吗？