WSO2 APIM 4.0调用API报404：请求资源不可用排查求助

操作背景 #

• API Manager上有一个已发布且可用的API
• 在Integration Studio中修改API代码后导出CAR包，部署到Micro Integrator 7.1.0并重启服务
• 在API Manager中执行保存并部署操作发布API新版本（此前多次操作均正常）

API端点配置 #

配置为两个服务URL的负载均衡：

• http://10.10.10.1:8290/demo-api/
• http://10.10.10.2:8290/demo-api/

调用测试对比 #

直接调用Micro Integrator（正常） #

执行以下curl命令：

curl -X GET http://10.10.10.1:8290/demo-api/getCountriesLookup

可正常返回结果。

通过API Manager调用（返回404） #

执行以下curl命令：

curl -X GET https://am.mydomain:443/demo/1.0.0/getCountriesLookup

返回404错误响应：

{
    "code": "404",
    "type": "Status report",
    "message": "Not Found",
    "description": "The requested resource is not available."
}

API Manager日志异常 #

TID: [-1] [] [2022-12-14 10:53:40,921]  INFO {org.apache.synapse.transport.passthru.SourceHandler} - Writer null when calling informWriterError
TID: [-1234] [] [2022-12-14 10:53:41,129]  INFO {org.apache.synapse.mediators.builtin.LogMediator} - STATUS = Message dispatched to the main sequence. Invalid URL., RESOURCE = /demo/1.0.0/getCountriesLookup, HEALTH CHECK URL = /demo/1.0.0/getCountriesLookup
TID: [-1] [] [2022-12-14 10:53:42,270] ERROR {org.apache.synapse.transport.passthru.SourceHandler} - HttpException occurred org.apache.http.ProtocolException: Invalid request line: GET /
        at org.apache.http.impl.nio.codecs.AbstractMessageParser.parse(AbstractMessageParser.java:209)
        at org.apache.synapse.transport.http.conn.LoggingNHttpServerConnection$LoggingNHttpMessageParser.parse(LoggingNHttpServerConnection.java:410)
        at org.apache.synapse.transport.http.conn.LoggingNHttpServerConnection$LoggingNHttpMessageParser.parse(LoggingNHttpServerConnection.java:384)
        at org.apache.http.impl.nio.DefaultNHttpServerConnection.consumeInput(DefaultNHttpServerConnection.java:262)
        at org.apache.synapse.transport.http.conn.LoggingNHttpServerConnection.consumeInput(LoggingNHttpServerConnection.java:114)
        at org.apache.synapse.transport.passthru.ServerIODispatch.onInputReady(ServerIODispatch.java:82)
        at org.apache.synapse.transport.passthru.ServerIODispatch.onInputReady(ServerIODispatch.java:39)
        at org.apache.http.impl.nio.reactor.AbstractIODispatch.inputReady(AbstractIODispatch.java:114)
        at org.apache.http.impl.nio.reactor.BaseIOReactor.readable(BaseIOReactor.java:162)
        at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:337)
        at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:315)
        at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:276)
        at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104)
        at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:591)
        at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: org.apache.http.ParseException: Invalid request line: GET /
        at org.apache.http.message.BasicLineParser.parseRequestLine(BasicLineParser.java:302)
        at org.apache.http.impl.nio.codecs.DefaultHttpRequestParser.createMessage(DefaultHttpRequestParser.java:117)
        at org.apache.http.impl.nio.codecs.DefaultHttpRequestParser.createMessage(DefaultHttpRequestParser.java:50)
        at org.apache.http.impl.nio.codecs.AbstractMessageParser.parseHeadLine(AbstractMessageParser.java:156)
        at org.apache.http.impl.nio.codecs.AbstractMessageParser.parse(AbstractMessageParser.java:207)
        ... 14 more

关键异常点 #

API Manager日志中显示的RESOURCE为/demo/1.0.0/getCountriesLookup，而非预期的/demo-api/1.0.0/getCountriesLookup，不清楚该上下文来源。

更新内容 #

1. 已添加API端点配置截图
2. API Manager测试控制台提供的调用命令为：

curl -X 'GET' \
  'https://am.mydomain:443/demo/1.0.0/getCountriesLookup' \
  -H 'accept: */*'

内容的提问来源于stack exchange，提问作者Mahmoud Saleh