Question

我在WSO2 ESB上部署了一个简单的代理服务。该服务定义如下：

<?xml version="1.0" encoding="UTF-8"?>
<proxy xmlns="http://ws.apache.org/ns/synapse"
       name="HelloWorld"
       transports="https http"
       startOnLoad="false"
       trace="enable"
       statistics="enable">
   <description/>
   <target>
      <endpoint>
         <wsdl service="HelloWorld"
               port="HelloWorldImplPort"
               uri="http://myhostname:9001/HelloWorldInternal?wsdl">
            <suspendOnFailure>
               <errorCodes>101508,101505,101503,101504</errorCodes>
               <initialDuration>1000</initialDuration>
               <progressionFactor>1.1</progressionFactor>
               <maximumDuration>30000</maximumDuration>
            </suspendOnFailure>
         </wsdl>
      </endpoint>
      <outSequence>
         <log level="full"/>
         <send/>
      </outSequence>
   </target>
   <publishWSDL uri="http://myhostname:9001/HelloWorldInternal?wsdl"/>
</proxy>

当目标服务关闭时启动WSO2 ESB时，我在ESB日志中出现以下错误：

[2014-02-20 14:25:05,168]  INFO - ProxyService Building Axis service for Proxy service : HelloWorld
[2014-02-20 14:25:06,176] ERROR - ProxyService Error reading from wsdl URI
java.net.ConnectException: Connection refused: connect
    at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
    at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:75)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:157)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:391)
    at java.net.Socket.connect(Socket.java:579)
    at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
    at sun.net.www.http.HttpClient.openServer(HttpClient.java:388)
    at sun.net.www.http.HttpClient.openServer(HttpClient.java:483)
    at sun.net.www.http.HttpClient.<init>(HttpClient.java:213)
    at sun.net.www.http.HttpClient.New(HttpClient.java:300)
    at sun.net.www.http.HttpClient.New(HttpClient.java:316)
    at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:992)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:928)
    at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:846)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1296)
    at org.apache.synapse.config.SynapseConfigUtils.getOMElementFromURL(SynapseConfigUtils.java:312)
    at org.apache.synapse.core.axis2.ProxyService.buildAxisService(ProxyService.java:284)
    at org.apache.synapse.Axis2SynapseController.deployProxyServices(Axis2SynapseController.java:709)
    at org.apache.synapse.Axis2SynapseController.createSynapseEnvironment(Axis2SynapseController.java:388)
    at org.apache.synapse.ServerManager.start(ServerManager.java:181)
    at org.wso2.carbon.mediation.initializer.ServiceBusInitializer.initESB(ServiceBusInitializer.java:424)
    at org.wso2.carbon.mediation.initializer.ServiceBusInitializer.activate(ServiceBusInitializer.java:182)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.eclipse.equinox.internal.ds.model.ServiceComponent.activate(ServiceComponent.java:260)
    at org.eclipse.equinox.internal.ds.model.ServiceComponentProp.activate(ServiceComponentProp.java:146)
    at org.eclipse.equinox.internal.ds.model.ServiceComponentProp.build(ServiceComponentProp.java:347)
    at org.eclipse.equinox.internal.ds.InstanceProcess.buildComponent(InstanceProcess.java:620)
    at org.eclipse.equinox.internal.ds.InstanceProcess.buildComponents(InstanceProcess.java:197)
    at org.eclipse.equinox.internal.ds.Resolver.getEligible(Resolver.java:343)
    at org.eclipse.equinox.internal.ds.SCRManager.serviceChanged(SCRManager.java:222)
    at org.eclipse.osgi.internal.serviceregistry.FilteredServiceListener.serviceChanged(FilteredServiceListener.java:107)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.dispatchEvent(BundleContextImpl.java:861)
    at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
    at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148)
    at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEventPrivileged(ServiceRegistry.java:819)
    at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEvent(ServiceRegistry.java:771)
    at org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.register(ServiceRegistrationImpl.java:130)
    at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.registerService(ServiceRegistry.java:214)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.registerService(BundleContextImpl.java:433)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.registerService(BundleContextImpl.java:451)
    at org.wso2.carbon.event.core.internal.builder.EventBrokerHandler.startEventBroker(EventBrokerHandler.java:58)
    at org.wso2.carbon.event.core.internal.builder.EventBrokerBuilderDS.activate(EventBrokerBuilderDS.java:72)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.eclipse.equinox.internal.ds.model.ServiceComponent.activate(ServiceComponent.java:260)
    at org.eclipse.equinox.internal.ds.model.ServiceComponentProp.activate(ServiceComponentProp.java:146)
    at org.eclipse.equinox.internal.ds.model.ServiceComponentProp.build(ServiceComponentProp.java:347)
    at org.eclipse.equinox.internal.ds.InstanceProcess.buildComponent(InstanceProcess.java:620)
    at org.eclipse.equinox.internal.ds.InstanceProcess.buildComponents(InstanceProcess.java:197)
    at org.eclipse.equinox.internal.ds.Resolver.getEligible(Resolver.java:343)
    at org.eclipse.equinox.internal.ds.SCRManager.serviceChanged(SCRManager.java:222)
    at org.eclipse.osgi.internal.serviceregistry.FilteredServiceListener.serviceChanged(FilteredServiceListener.java:107)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.dispatchEvent(BundleContextImpl.java:861)
    at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
    at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148)
    at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEventPrivileged(ServiceRegistry.java:819)
    at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEvent(ServiceRegistry.java:771)
    at org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.register(ServiceRegistrationImpl.java:130)
    at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.registerService(ServiceRegistry.java:214)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.registerService(BundleContextImpl.java:433)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.registerService(BundleContextImpl.java:451)
    at org.wso2.carbon.core.init.CarbonServerManager.initializeCarbon(CarbonServerManager.java:517)
    at org.wso2.carbon.core.init.CarbonServerManager.start(CarbonServerManager.java:219)
    at org.wso2.carbon.core.internal.CarbonCoreServiceComponent.activate(CarbonCoreServiceComponent.java:77)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.eclipse.equinox.internal.ds.model.ServiceComponent.activate(ServiceComponent.java:260)
    at org.eclipse.equinox.internal.ds.model.ServiceComponentProp.activate(ServiceComponentProp.java:146)
    at org.eclipse.equinox.internal.ds.model.ServiceComponentProp.build(ServiceComponentProp.java:347)
    at org.eclipse.equinox.internal.ds.InstanceProcess.buildComponent(InstanceProcess.java:620)
    at org.eclipse.equinox.internal.ds.InstanceProcess.buildComponents(InstanceProcess.java:197)
    at org.eclipse.equinox.internal.ds.Resolver.getEligible(Resolver.java:343)
    at org.eclipse.equinox.internal.ds.SCRManager.serviceChanged(SCRManager.java:222)
    at org.eclipse.osgi.internal.serviceregistry.FilteredServiceListener.serviceChanged(FilteredServiceListener.java:107)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.dispatchEvent(BundleContextImpl.java:861)
    at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
    at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148)
    at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEventPrivileged(ServiceRegistry.java:819)
    at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEvent(ServiceRegistry.java:771)
    at org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.register(ServiceRegistrationImpl.java:130)
    at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.registerService(ServiceRegistry.java:214)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.registerService(BundleContextImpl.java:433)
    at org.eclipse.equinox.http.servlet.internal.Activator.registerHttpService(Activator.java:81)
    at org.eclipse.equinox.http.servlet.internal.Activator.addProxyServlet(Activator.java:60)
    at org.eclipse.equinox.http.servlet.internal.ProxyServlet.init(ProxyServlet.java:40)
    at org.wso2.carbon.tomcat.ext.servlet.DelegationServlet.init(DelegationServlet.java:38)
    at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1267)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1186)
    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1081)
    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5027)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5314)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
    at java.util.concurrent.FutureTask.run(FutureTask.java:166)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
    at java.lang.Thread.run(Thread.java:722)
[2014-02-20 14:25:06,217]  WARN - Axis2SynapseController The proxy service HelloWorld cannot be deployed - Continue in Proxy Service fail-safe mode.
[2014-02-20 14:25:06,217]  INFO - Axis2SynapseController Deploying EventSources...
[2014-02-20 14:25:06,227]  INFO - ServerManager Server ready for processing...

该服务现在从WSO2 Web控制台中消失。

如何才能使服务不会从控制台中消失？
如何配置WSO2以在我的目标服务启动时自动启动代理服务？

现在，即使目标服务最终启动，对代理服务的任何调用都会导致HTTP 202接受。让我的代理服务再次可见的唯一方法是触摸它的配置文件，以便重新部署。

我正在使用WSO2 ESB 4.8.1

Answer 1

我也遇到过类似的问题。 ESB尝试在启动时读取WSDL。

请在此处创建JIRA：https://wso2.org/jira/browse/ESBJAVA

触摸代理配置将重新部署它。我也不知道重新部署任何其他解决方法。

一种解决方法是将WSDL保存在注册表中，并在代理配置中引用该WSDL。这answer可能会对您有所帮助。

Answer 2

所以我创建了一个名为HelloWorld.wsdl的Inline XML类型的Local条目。然后，我在我的HelloWorld.xml服务定义中引用它，如下所示：<publishWSDL key="HelloWorld.wsdl"/>，但仍然

ESB在启动时抱怨目标服务不可用
每次从ESB获取WSLD的尝试都会传递给目标WebService（我可以在我的WS日志中看到它）

这是我的完整服务定义

<?xml version="1.0" encoding="UTF-8"?>
<proxy xmlns="http://ws.apache.org/ns/synapse"
       name="HelloWorld"
       transports="https http"
       startOnLoad="false"
       trace="enable"
       statistics="enable">
   <description/>
   <target>
      <endpoint>
         <wsdl service="HelloWorld"
               port="HelloWorldImplPort"
               uri="http://myhostname:9001/HelloWorldInternal?wsdl">
            <suspendOnFailure>
               <errorCodes>101508,101505,101503,101504</errorCodes>
               <initialDuration>1000</initialDuration>
               <progressionFactor>1.1</progressionFactor>
               <maximumDuration>30000</maximumDuration>
            </suspendOnFailure>
         </wsdl>
      </endpoint>
      <outSequence>
         <log level="full"/>
         <send/>
      </outSequence>
   </target>
   <publishWSDL key="HelloWorld.wsdl"/>
</proxy>

相反，对于不可用的目标服务，使用另一个代理服务，但没有WSDL ，会出现错误[2014-02-21 09:59:19,250] WARN - WSDLEndpointFactory Could not connect to the WSDL endpoint http://someipaddress:28280/services/HelloWorldExternal?wsdl java.net.ConnectException: Connection refused: connect

但代理服务已部署。代理服务配置如下：

<?xml version="1.0" encoding="UTF-8"?>
<proxy xmlns="http://ws.apache.org/ns/synapse"
       name="HelloWorldExternal2"
       transports="https http"
       startOnLoad="true"
       trace="enable"
       statistics="enable">
   <target>
      <endpoint>
         <wsdl service="HelloWorldExternal"
               port="HelloWorldExternalHttpSoap11Endpoint"
               uri="http://someipaddress:28280/services/HelloWorldExternal?wsdl"/>
      </endpoint>
      <outSequence>
         <log level="full"/>
         <send/>
      </outSequence>
   </target>
   <!-- publishWSDL uri="http://someipaddress:28280/services/HelloWorldExternal?wsdl"/ -->
</proxy>

如何发布WSDL，并在启动时加载代理服务，即使目标服务不可用？

编辑 2014-02-21 11:01

要让ESB从本地条目中选择自定义WSDL，必须将代理服务参数useOriginalwsdl设置为true。这解决了服务无法在启动时启动。但是，这样做会引发另一个问题。代理服务仍然无法调用。服务器日志附加在下面，客户端因套接字读取超时而失败。我知道suspendOnFailure设置，这些设置应该会在30秒内过期连接错误。

[2014-02-21 10:52:06,121] ERROR - ClientUtils The system cannot infer the transport information from the /services/HelloWorld.HelloWorldHttpSoap11Endpoint URL.
[2014-02-21 10:52:06,121] ERROR - Axis2Sender Unexpected error during sending message out
org.apache.axis2.AxisFault: The system cannot infer the transport information from the /services/HelloWorld.HelloWorldHttpSoap11Endpoint URL.
        at org.apache.axis2.description.ClientUtils.inferOutTransport(ClientUtils.java:81)
        at org.apache.synapse.core.axis2.DynamicAxisOperation$DynamicOperationClient.executeImpl(DynamicAxisOperation.java:115)
        at org.apache.axis2.client.OperationClient.execute(OperationClient.java:149)
        at org.apache.synapse.core.axis2.Axis2FlexibleMEPClient.send(Axis2FlexibleMEPClient.java:482)
        at org.apache.synapse.core.axis2.Axis2Sender.sendOn(Axis2Sender.java:59)
        at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.send(Axis2SynapseEnvironment.java:338)
        at org.apache.synapse.endpoints.AbstractEndpoint.send(AbstractEndpoint.java:333)
        at org.apache.synapse.endpoints.WSDLEndpoint.send(WSDLEndpoint.java:69)
        at org.apache.synapse.core.axis2.ProxyServiceMessageReceiver.receive(ProxyServiceMessageReceiver.java:187)
        at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:180)
        at org.apache.synapse.transport.passthru.ServerWorker.processEntityEnclosingRequest(ServerWorker.java:411)
        at org.apache.synapse.transport.passthru.ServerWorker.run(ServerWorker.java:183)
        at org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:172)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
        at java.lang.Thread.run(Thread.java:722)
[2014-02-21 10:52:06,126]  WARN - FaultHandler ERROR_CODE : 0
[2014-02-21 10:52:06,126]  WARN - FaultHandler ERROR_MESSAGE : Unexpected error during sending message out
[2014-02-21 10:52:06,126]  WARN - FaultHandler ERROR_DETAIL : org.apache.synapse.SynapseException: Unexpected error during sending message out
        at org.apache.synapse.core.axis2.Axis2Sender.handleException(Axis2Sender.java:172)
        at org.apache.synapse.core.axis2.Axis2Sender.sendOn(Axis2Sender.java:71)
        at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.send(Axis2SynapseEnvironment.java:338)
        at org.apache.synapse.endpoints.AbstractEndpoint.send(AbstractEndpoint.java:333)
        at org.apache.synapse.endpoints.WSDLEndpoint.send(WSDLEndpoint.java:69)
        at org.apache.synapse.core.axis2.ProxyServiceMessageReceiver.receive(ProxyServiceMessageReceiver.java:187)
        at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:180)
        at org.apache.synapse.transport.passthru.ServerWorker.processEntityEnclosingRequest(ServerWorker.java:411)
        at org.apache.synapse.transport.passthru.ServerWorker.run(ServerWorker.java:183)
        at org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:172)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
        at java.lang.Thread.run(Thread.java:722)
Caused by: org.apache.axis2.AxisFault: The system cannot infer the transport information from the /services/HelloWorld.HelloWorldHttpSoap11Endpoint URL.
        at org.apache.axis2.description.ClientUtils.inferOutTransport(ClientUtils.java:81)
        at org.apache.synapse.core.axis2.DynamicAxisOperation$DynamicOperationClient.executeImpl(DynamicAxisOperation.java:115)
        at org.apache.axis2.client.OperationClient.execute(OperationClient.java:149)
        at org.apache.synapse.core.axis2.Axis2FlexibleMEPClient.send(Axis2FlexibleMEPClient.java:482)
        at org.apache.synapse.core.axis2.Axis2Sender.sendOn(Axis2Sender.java:59)
        ... 11 more

[2014-02-21 10:52:06,129]  WARN - FaultHandler ERROR_EXCEPTION : org.apache.synapse.SynapseException: Unexpected error during sending message out
[2014-02-21 10:52:06,129]  WARN - FaultHandler FaultHandler : AnonymousEndpoint

目前，当目标服务停止时似乎无法启动WSO2 ESB代理服务。

如果目标不可用，则无法启动WSO2 ESB代理服务

2 个答案: