WSO2微集成器部署Twilio连接器报错NoSuchMethodError求解决方案

问题描述 #

在WSO2中使用Twilio Connector，将.car文件部署到Micro Integrator运行时出现以下报错，但在Integration Studio自带的嵌入式服务器上运行该连接器一切正常。

报错日志 #

[2022-10-07 15:31:24,320] ERROR {NativeWorkerPool} - Uncaught exception java.lang.NoSuchMethodError: org.apache.http.impl.client.DefaultRedirectStrategy.<init>([Ljava/lang/String;)V
        at com.twilio.http.HttpClient.<init>(HttpClient.java:35)
        at com.twilio.http.NetworkHttpClient.<init>(NetworkHttpClient.java:54)
        at com.twilio.http.NetworkHttpClient.<init>(NetworkHttpClient.java:45)
        at com.twilio.http.NetworkHttpClient.<init>(NetworkHttpClient.java:36)
        at com.twilio.http.TwilioRestClient$Builder.build(TwilioRestClient.java:143)
        at com.twilio.Twilio.buildRestClient(Twilio.java:202)
        at com.twilio.Twilio.getRestClient(Twilio.java:174)
        at com.twilio.base.Creator.create(Creator.java:40)
        at org.wso2.carbon.connector.twilio.sms.SendSms.connect(SendSms.java:67)
        at org.wso2.carbon.connector.core.AbstractConnector.mediate(AbstractConnector.java:32)
        at org.apache.synapse.mediators.ext.ClassMediator.mediate(ClassMediator.java:94)
        at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:109)
        at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:71)
        at org.apache.synapse.mediators.template.TemplateMediator.mediate(TemplateMediator.java:134)
        at org.apache.synapse.mediators.template.InvokeMediator.mediate(InvokeMediator.java:169)
        at org.apache.synapse.mediators.template.InvokeMediator.mediate(InvokeMediator.java:92)
        at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:109)
        at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:71)
        at org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:158)
        at org.apache.synapse.rest.Resource.process(Resource.java:331)
        at org.apache.synapse.rest.API.process(API.java:448)
        at org.apache.synapse.rest.RESTRequestHandler.apiProcess(RESTRequestHandler.java:120)
        at org.apache.synapse.rest.RESTRequestHandler.dispatchToAPI(RESTRequestHandler.java:98)
        at org.apache.synapse.rest.RESTRequestHandler.process(RESTRequestHandler.java:71)
        at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2SynapseEnvironment.java:331)
        at org.apache.synapse.core.axis2.SynapseMessageReceiver.receive(SynapseMessageReceiver.java:99)
        at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:180)
        at org.apache.synapse.transport.passthru.ServerWorker.processNonEntityEnclosingRESTHandler(ServerWorker.java:367)
        at org.apache.synapse.transport.passthru.ServerWorker.processEntityEnclosingRequest(ServerWorker.java:426)
        at org.apache.synapse.transport.passthru.ServerWorker.run(ServerWorker.java:181)
        at org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:172)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
        at java.base/java.lang.Thread.run(Thread.java:834)

原因分析 #

该错误由不兼容的org.apache.httpcomponents.httpclient运行时版本导致，所需依赖配置如下：

<dependency>
     <groupId>org.apache.httpcomponents</groupId>
     <artifactId>httpclient</artifactId>
     <version>4.5.12</version>
</dependency>

解决方案 #

步骤1：添加依赖到Micro Integrator #

• 找到Micro Integrator的安装目录，进入<MI_HOME>/repository/components/lib文件夹
• 下载httpclient-4.5.12.jar文件，将其复制到该lib目录下

步骤2：清理旧版本依赖（可选） #

• 检查<MI_HOME>/repository/components/lib目录中是否存在旧版本的httpclient-xxx.jar（xxx为低于4.5.12的版本），若存在则删除该文件，避免版本冲突

步骤3：重启Micro Integrator #

• 停止当前运行的Micro Integrator服务，重新启动，使新依赖生效

步骤4：重新部署验证 #

• 将Twilio Connector的.car文件重新部署到Micro Integrator，测试连接器功能是否正常

内容的提问来源于stack exchange，提问作者Ayub Jamal