在 HA 中启动时出现 WSO2 API Manager 节点错误

如何解决在 HA 中启动时出现 WSO2 API Manager 节点错误

我目前为 WSo2 API 管理器设置了 HA，网关、外部网关和 KM 具有相同的设置，其中每个节点都有两个节点位于负载均衡器后面。目前一切都完美启动，直到我启动第二个管理器节点我收到以下错误：

TID: [-1234] [] [2021-06-14 08:15:01,780] ERROR {org.apache.catalina.core.ContainerBase.[Catalina].[localhost]} - Exception Processing ErrorPage[errorCode=500,location=/carbon/errors/error_500.html] java.lang.NullPointerException
        at org.wso2.carbon.ui.tracker.AuthenticatorRegistry.getCarbonAuthenticator(AuthenticatorRegistry.java:67)
        at org.wso2.carbon.ui.CarbonUILoginUtil.getAuthenticator(CarbonUILoginUtil.java:74)
        at org.wso2.carbon.ui.CarbonSecuredHttpContext.handleSecurity(CarbonSecuredHttpContext.java:76)
        at org.eclipse.equinox.http.servlet.internal.ServletRegistration.service(ServletRegistration.java:60)
        at org.eclipse.equinox.http.servlet.internal.ProxyServlet.processAlias(ProxyServlet.java:128)
        at org.eclipse.equinox.http.servlet.internal.ProxyServlet.service(ProxyServlet.java:68)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:733)
        at org.wso2.carbon.tomcat.ext.servlet.DelegationServlet.service(DelegationServlet.java:68)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
        at org.apache.catalina.core.Applicationdispatcher.invoke(Applicationdispatcher.java:710)
        at org.apache.catalina.core.Applicationdispatcher.processRequest(Applicationdispatcher.java:459)
        at org.apache.catalina.core.Applicationdispatcher.doForward(Applicationdispatcher.java:384)
        at org.apache.catalina.core.Applicationdispatcher.forward(Applicationdispatcher.java:312)
        at org.apache.catalina.core.StandardHostValve.custom(StandardHostValve.java:398)
        at org.apache.catalina.core.StandardHostValve.status(StandardHostValve.java:257)
        at org.apache.catalina.core.StandardHostValve.throwable(StandardHostValve.java:352)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:177)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
        at org.wso2.carbon.identity.context.rewrite.valve.TenantContextRewriteValve.invoke(TenantContextRewriteValve.java:86)
        at org.wso2.carbon.identity.authz.valve.AuthorizationValve.invoke(AuthorizationValve.java:110)
        at org.wso2.carbon.identity.auth.valve.AuthenticationValve.invoke(AuthenticationValve.java:102)
        at org.wso2.carbon.tomcat.ext.valves.CompositeValve.continueInvocation(CompositeValve.java:99)
        at org.wso2.carbon.tomcat.ext.valves.TomcatValveContainer.invokeValves(TomcatValveContainer.java:49)
        at org.wso2.carbon.tomcat.ext.valves.CompositeValve.invoke(CompositeValve.java:62)
        at org.wso2.carbon.tomcat.ext.valves.CarbonStuckThreadDetectionValve.invoke(CarbonStuckThreadDetectionValve.java:145)
        at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:687)
        at org.wso2.carbon.tomcat.ext.valves.CarbonContextCreatorValve.invoke(CarbonContextCreatorValve.java:57)
        at org.wso2.carbon.tomcat.ext.valves.RequestCorrelationIdValve.invoke(RequestCorrelationIdValve.java:124)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357)
        at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374)
        at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
        at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893)
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1707)
        at org.apache.tomcat.util.net.socketProcessorBase.run(SocketProcessorBase.java:49)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Thread.java:748)

解决方法

当 API 管理器在服务器完全启动之前开始接收服务端点调用时，可以观察到上述错误跟踪。

如果您在 LB 中配置了一个健康检查端点而不是上面提到的，那么请将健康检查 URL 更新为 https://<HOSTNAME>:9443/services/Version 以克服这种行为。

此外，这些错误会在服务器启动期间打印出来，一旦 API Manager 服务器完全启动并运行，这些错误将自动解决。