hqr2019 opened a new issue #421:
URL: https://github.com/apache/dubbo-samples/issues/421
发布之后因为k8s对服务进行健康检查时使用http请求该端口导致一直报错。
测试telnet podip 22222 发现服务启动正常，可以进入dubbo命令行，但不能使用http协议进行访问
```
telnet 127.0.0.1 22222
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
___ __ __ ___ ___ ____
/ _ \ / / / // _ ) / _ ) / __ \
/ // // /_/ // _ |/ _ |/ /_/ /
/____/ \____//____//____/ \____/
dubbo>help
+------------------+----------------------------------------------------------------------------------+
| cd | Change default service.
|
+------------------+----------------------------------------------------------------------------------+
| count | Count the service.
|
+------------------+----------------------------------------------------------------------------------+
| help | help command
|
+------------------+----------------------------------------------------------------------------------+
| invoke | Invoke the service method.
|
+------------------+----------------------------------------------------------------------------------+
| live | Judge if service is alive?
|
+------------------+----------------------------------------------------------------------------------+
| ls | ls service
|
+------------------+----------------------------------------------------------------------------------+
| offline | offline dubbo
|
+------------------+----------------------------------------------------------------------------------+
| offlineApp | offline app addresses
|
+------------------+----------------------------------------------------------------------------------+
| offlineInterface | offline dubbo
|
+------------------+----------------------------------------------------------------------------------+
| onlineApp | online app addresses
|
+------------------+----------------------------------------------------------------------------------+
| onlineApp | online app addresses
|
+------------------+----------------------------------------------------------------------------------+
| onlineInterface | online dubbo
|
+------------------+----------------------------------------------------------------------------------+
| ps | Print server ports and connections.
|
+------------------+----------------------------------------------------------------------------------+
| publishMetadata | update service metadata and service instance
|
+------------------+----------------------------------------------------------------------------------+
| pwd | Print working default service.
|
+------------------+----------------------------------------------------------------------------------+
| quit | quit telnet console
|
+------------------+----------------------------------------------------------------------------------+
| ready | Judge if service is ready to work?
|
+------------------+----------------------------------------------------------------------------------+
| select | Select the index of the method you want to invoke
|
+------------------+----------------------------------------------------------------------------------+
| shutdown | Shutdown Dubbo Application.
|
+------------------+----------------------------------------------------------------------------------+
| startup | Judge if service has started?
|
+------------------+----------------------------------------------------------------------------------+
| version | version command(show dubbo version)
|
+------------------+----------------------------------------------------------------------------------+
```
命令行使用上述命令也不行，http请求上述地址会引起netty报错：
```
2022-02-06 11:27:55.228 WARN 52279 --- [qos-worker-3-10]
io.netty.channel.DefaultChannelPipeline : An exceptionCaught() event was
fired, and it reached at the tail of the pipeline. It usually means the last
handler in the pipeline did not handle the exception.
java.lang.NullPointerException: null
at
org.apache.dubbo.qos.server.handler.HttpProcessHandler.http(HttpProcessHandler.java:61)
~[dubbo-3.0.5.jar:3.0.5]
at
org.apache.dubbo.qos.server.handler.HttpProcessHandler.channelRead0(HttpProcessHandler.java:97)
~[dubbo-3.0.5.jar:3.0.5]
at
org.apache.dubbo.qos.server.handler.HttpProcessHandler.channelRead0(HttpProcessHandler.java:50)
~[dubbo-3.0.5.jar:3.0.5]
at
io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:99)
~[netty-transport-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
[netty-transport-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
[netty-transport-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
[netty-transport-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)
[netty-codec-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
[netty-transport-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
[netty-transport-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
[netty-transport-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:436)
[netty-transport-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:327)
[netty-codec-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:299)
[netty-codec-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251)
[netty-transport-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
[netty-transport-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
[netty-transport-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
[netty-transport-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.handler.codec.ByteToMessageDecoder.handlerRemoved(ByteToMessageDecoder.java:255)
[netty-codec-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:517)
[netty-codec-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:449)
[netty-codec-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:279)
[netty-codec-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
[netty-transport-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
[netty-transport-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
[netty-transport-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
[netty-transport-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
[netty-transport-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
[netty-transport-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
[netty-transport-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166)
[netty-transport-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:722)
[netty-transport-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:658)
[netty-transport-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:584)
[netty-transport-4.1.73.Final.jar:4.1.73.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:496)
[netty-transport-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:986)
[netty-common-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
[netty-common-4.1.73.Final.jar:4.1.73.Final]
at
io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
[netty-common-4.1.73.Final.jar:4.1.73.Final]
at java.lang.Thread.run(Thread.java:750) [na:1.8.0_321]
```
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