TcpOutboundGateway -无法关联响应-没有挂起的答复

Question

我使用spring集成来创建TCP服务器，并测试它是否与junit一起工作。问题是，我收到了一个错误: org.springframework.integration.ip.tcp.TcpOutboundGateway -无法关联响应-没有挂起的答复。请帮我修一下。这是更多的信息。我有向服务器发送一些数据的单元测试，服务器必须在每一部分数据上回答“成功”。但是在读取数据的第二部分之后，TcpOutboundGateway (在单元测试端)写错了日志。

因此，服务器配置文件：

<int-ip:tcp-connection-factory id="crLfServer"
    type="server"
    port="5000"
    single-use="false"
    so-timeout="10000"
     />

<task:executor id="pool" pool-size="16"/>

<int-ip:tcp-inbound-gateway id="gatewayCrLf"
    connection-factory="crLfServer"
    request-channel="serverBytes2StringChannel"
    error-channel="errorChannel"/>

<int:channel id="toSA" >
    <int:dispatcher task-executor="pool" />
</int:channel>

<int:service-activator input-channel="toSA"
    ref="connectionHandler"
    method="handleData" />


<bean id="connectionHandler" class="com.pc.tracker.utils.ConnectionHandler" />
<bean id="objectMapper" class="org.codehaus.jackson.map.ObjectMapper"/>

<int:transformer id="serverBytes2String"
    input-channel="serverBytes2StringChannel"
    output-channel="toSA"
    expression="new String(payload).trim()"/>

<int:transformer id="errorHandler"
    input-channel="errorChannel"
    expression="payload.failedMessage.payload + ':' + payload.cause.message"/>

客户端配置文件：

<int:gateway id="gw"
    service-interface="com.pc.tracker.tcp.ConnectionHandlerTestHellperGateway"
    default-request-channel="input"/>

<int-ip:tcp-connection-factory id="client"
    type="client"
    host="localhost"
    port="5000"
    single-use="false"
    so-timeout="10000"/>

<int:channel id="input" />

<int-ip:tcp-outbound-gateway id="outGateway"
    request-channel="input"
    reply-channel="clientBytes2StringChannel"
    connection-factory="client"
    request-timeout="10000"
    reply-timeout="10000"/>

<int:transformer id="clientBytes2String"
    input-channel="clientBytes2StringChannel"
    expression="new String(payload)"/>

以及产生已经提到的错误的测试。

    @Test
public void testRecivedBackupedData() {
    String testData = 
             "[{\"s\":1,\"t\":0,\"b\":0,\"sp\":0,\"long\":0,\"sa\":0,\"lat\":0,\"a\":0,\"i\":\"device_for_unit_tests\"},"
            + "{\"s\":12,\"t\":0,\"b\":0,\"sp\":0,\"long\":0,\"sa\":0,\"lat\":0,\"a\":0,\"i\":\"device_for_unit_tests\"}]\r\n"
           + "[{\"s\":13,\"t\":0,\"b\":0,\"sp\":0,\"long\":0,\"sa\":0,\"lat\":0,\"a\":0,\"i\":\"device_for_unit_tests\"},"
            + "{\"s\":24,\"t\":0,\"b\":0,\"sp\":0,\"long\":0,\"sa\":0,\"lat\":0,\"a\":0,\"i\":\"device_for_unit_tests\"}]\r\n"
            + "[{\"s\":1,\"t\":0,\"b\":0,\"sp\":0,\"long\":0,\"sa\":0,\"lat\":0,\"a\":0,\"i\":\"device_for_unit_tests\"},"
            + "{\"s\":12,\"t\":0,\"b\":0,\"sp\":0,\"long\":0,\"sa\":0,\"lat\":0,\"a\":0,\"i\":\"device_for_unit_tests\"}]\r\n"
            +"[{\"s\":1,\"t\":0,\"b\":0,\"sp\":0,\"long\":0,\"sa\":0,\"lat\":0,\"a\":0,\"i\":\"device_for_unit_tests\"},"
            + "{\"s\":12,\"t\":0,\"b\":0,\"sp\":0,\"long\":0,\"sa\":0,\"lat\":0,\"a\":0,\"i\":\"device_for_unit_tests\"}]\r\n";
    String result = gw.send(testData);

这是带有错误的日志

    2014-04-11 23:12:23,059 [pool-1] ERROR com.pc.tracker.utils.ConnectionHandler - recived data: [{"s":1,"t":0,"b":0,"sp":0,"long":0,"sa":0,"lat":0,"a":0,"i":"device_for_unit_tests"},{"s":12,"t":0,"b":0,"sp":0,"long":0,"sa":0,"lat":0,"a":0,"i":"device_for_unit_tests"}]
2014-04-11 23:12:23,263 [pool-1] ERROR com.pc.tracker.utils.ConnectionHandler - parsisted
2014-04-11 23:12:23,265 [pool-2] ERROR com.pc.tracker.utils.ConnectionHandler - recived data: [{"s":13,"t":0,"b":0,"sp":0,"long":0,"sa":0,"lat":0,"a":0,"i":"device_for_unit_tests"},{"s":24,"t":0,"b":0,"sp":0,"long":0,"sa":0,"lat":0,"a":0,"i":"device_for_unit_tests"}]
2014-04-11 23:12:23,330 [pool-2] ERROR com.pc.tracker.utils.ConnectionHandler - parsisted
2014-04-11 23:12:23,331 [pool-2-thread-1] ERROR org.springframework.integration.ip.tcp.TcpOutboundGateway - Cannot correlate response - no pending reply
2014-04-11 23:12:23,332 [pool-3] ERROR com.pc.tracker.utils.ConnectionHandler - recived data: [{"s":1,"t":0,"b":0,"sp":0,"long":0,"sa":0,"lat":0,"a":0,"i":"device_for_unit_tests"},{"s":12,"t":0,"b":0,"sp":0,"long":0,"sa":0,"lat":0,"a":0,"i":"device_for_unit_tests"}]
2014-04-11 23:12:23,409 [pool-3] ERROR com.pc.tracker.utils.ConnectionHandler - parsisted
2014-04-11 23:12:23,409 [pool-2-thread-1] ERROR org.springframework.integration.ip.tcp.TcpOutboundGateway - Cannot correlate response - no pending reply
2014-04-11 23:12:23,410 [pool-4] ERROR com.pc.tracker.utils.ConnectionHandler - recived data: [{"s":1,"t":0,"b":0,"sp":0,"long":0,"sa":0,"lat":0,"a":0,"i":"device_for_unit_tests"},{"s":12,"t":0,"b":0,"sp":0,"long":0,"sa":0,"lat":0,"a":0,"i":"device_for_unit_tests"}]
2014-04-11 23:12:23,487 [pool-4] ERROR com.pc.tracker.utils.ConnectionHandler - parsisted
2014-04-11 23:12:23,488 [pool-2-thread-1] ERROR org.springframework.integration.ip.tcp.TcpOutboundGateway - Cannot correlate response - no pending reply
2014-04-11 23:12:23,489 [pool-5] ERROR com.pc.tracker.utils.ConnectionHandler - recived data: 
2014-04-11 23:12:23,490 [pool-2-thread-1] ERROR org.springframework.integration.ip.tcp.TcpOutboundGateway - Cannot correlate response - no pending reply

我花了两天时间解决这个问题。很抱歉提了很长的问题。谢谢。

Answer 1

你用嵌入式\r\n发送数据..。

public void testRecivedBackupedData() {
    String testData = 
         "[{\"s\":1,\"t\":0,\"b\":0,\"sp\":0,\"long\":0,\"sa\":0,\"lat\":0,\"a\":0,\"i\":\"device_for_unit_tests\"},"
        + "{\"s\":12,\"t\":0,\"b\":0,\"sp\":0,\"long\":0,\"sa\":0,\"lat\":0,\"a\":0,\"i\":\"device_for_unit_tests\"}]\r\n"
       + "[{\"s\":13,\"t\":0,\"b\":0,\"sp\":0,\"long\":0,\"sa\":0,\"lat\":0,\"a\":0,\"i\":\"device_for_unit_tests\"},"
        + "{\"s\":24,\"t\":0,\"b\":0,\"sp\":0,\"long\":0,\"sa\":0,\"lat\":0,\"a\":0,\"i\":\"device_for_unit_tests\"}]\r\n"
        + "[{\"s\":1,\"t\":0,\"b\":0,\"sp\":0,\"long\":0,\"sa\":0,\"lat\":0,\"a\":0,\"i\":\"device_for_unit_tests\"},"
        + "{\"s\":12,\"t\":0,\"b\":0,\"sp\":0,\"long\":0,\"sa\":0,\"lat\":0,\"a\":0,\"i\":\"device_for_unit_tests\"}]\r\n"
        +"[{\"s\":1,\"t\":0,\"b\":0,\"sp\":0,\"long\":0,\"sa\":0,\"lat\":0,\"a\":0,\"i\":\"device_for_unit_tests\"},"
        + "{\"s\":12,\"t\":0,\"b\":0,\"sp\":0,\"long\":0,\"sa\":0,\"lat\":0,\"a\":0,\"i\":\"device_for_unit_tests\"}]\r\n";
String result = gw.send(testData);

将它们全部删除；框架将在最后添加一个。

您的服务器正在套接字上为一个请求发送多个回复。搜索连接id localhost:5000:51420:9f93417a-c879-4753-a61e-0b9485940d14。您将看到您发送您的请求

2014-04-12 11:27:11,307

收到答复的网址是：

2014-04-12 11:27:11,340

(onMessage() call)并发送到

2014-04-12 11:27:11,343

该套接字上的下一个活动是接收另一条消息。

2014-04-12 11:27:11,346

因为没有人在等待，因此出现了错误消息。

现在，看看连接id，我们可以看到远程套接字是51420，所以让我们看看服务器端.

服务器上相应的连接id是localhost:51420:5000:66862ff3-3f40-4291-938f-0694bf3727be。对原始请求的答复success被发送到

2014-04-12 11:27:11,339

但是，同一个线程读取另一条消息(没有另一条发送)--注意消息Available to read:525。

因此，底线是您使用的是默认(反)序列化程序，它期望消息以\r\n结束，但您发送的请求中嵌入了\r\n，因此当发送方只发送一条消息时，服务器端将“看到”多个请求。

TCP是一种流协议--您需要以某种方式对数据进行帧设置，以便服务器端知道消息何时完成。如果需要发送包含\r\n的数据，则需要使用不同的反序列化器来检测数据的末尾(可能是长度头实现，这是最有效的)。

可用的标准序列化程序和有关自定义它们的信息是记录在这里。