Hi,

I am trying to migrate from log4j1.x to log4j2.17.2 using log4j1.x bridge 
approach. I am getting below ClassCastException error message. Please let me 
know if you have any idea how to fix this.

2022-03-08 01:41:17,023 http-nio-8088-exec-9 ERROR Unable to create Lookup for 
bundle java.lang.ClassCastException: class 
org.apache.logging.log4j.core.lookup.ResourceBundleLookup
              at java.lang.Class.asSubclass(Class.java:3404)
              at 
org.apache.logging.log4j.core.lookup.Interpolator.<init>(Interpolator.java:79)
              at 
org.apache.logging.log4j.core.lookup.Interpolator.<init>(Interpolator.java:100)
              at 
org.apache.logging.log4j.core.config.AbstractConfiguration.<init>(AbstractConfiguration.java:133)
              at 
org.apache.log4j.config.Log4j1Configuration.<init>(Log4j1Configuration.java:43)
              at 
org.apache.log4j.config.PropertiesConfiguration.<init>(PropertiesConfiguration.java:99)
              at 
org.apache.log4j.config.PropertiesConfiguration.<init>(PropertiesConfiguration.java:110)
              at 
org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:300)
              at 
org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:276)
              at 
org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:388)
              at 
org.apache.log4j.PropertyConfigurator.configure(PropertyConfigurator.java:183)
              at 
com.Custom.tools.logging.CustomLogger.resetURL(CustomLogger.java:408)
              at 
com.Custom..impl.JavaLogPropertyHelper.updateJavaLogPropertiesFromList(JavaLogPropertyHelper.java:226)
              at 
com.Custom..impl.CustomServiceConfigurationImpl.SetHostProperties(CustomServiceConfigurationImpl.java:293)
              at 
com.Custom.Comm.CommToICustomServiceConfiguration.setHostProperties(CommToICustomServiceConfiguration.java:642)
              at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
              at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
              at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
              at java.lang.reflect.Method.invoke(Method.java:498)
              at com.sun.xml.ws.util.Trampoline.invoke(MethodUtil.java:52)
              at sun.reflect.GeneratedMethodAccessor142.invoke(Unknown Source)
              at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
              at java.lang.reflect.Method.invoke(Method.java:498)
              at com.sun.xml.ws.util.MethodUtil.invoke(MethodUtil.java:77)
              at com.sun.xml.ws.api.server.MethodUtil.invoke(MethodUtil.java:34)
              at 
com.sun.xml.ws.api.server.InstanceResolver$1.invoke(InstanceResolver.java:220)
              at 
com.sun.xml.ws.server.InvokerTube$2.invoke(InvokerTube.java:119)
              at 
com.sun.xml.ws.server.sei.SEIInvokerTube.processRequest(SEIInvokerTube.java:58)
              at com.sun.xml.ws.api.pipe.Fiber.__doRun(Fiber.java:1106)
              at com.sun.xml.ws.api.pipe.Fiber._doRun(Fiber.java:1020)
              at com.sun.xml.ws.api.pipe.Fiber.doRun(Fiber.java:989)
              at com.sun.xml.ws.api.pipe.Fiber.runSync(Fiber.java:847)
              at 
com.sun.xml.ws.server.WSEndpointImpl$2.process(WSEndpointImpl.java:389)
              at 
com.sun.xml.ws.transport.http.HttpAdapter$HttpToolkit.handle(HttpAdapter.java:838)
              at 
com.sun.xml.ws.transport.http.HttpAdapter.handle(HttpAdapter.java:392)
              at 
com.sun.xml.ws.transport.http.servlet.ServletAdapter.invokeAsync(ServletAdapter.java:195)
              at 
com.sun.xml.ws.transport.http.servlet.WSServletDelegate.doGet(WSServletDelegate.java:131)
              at 
com.sun.xml.ws.transport.http.servlet.WSServletDelegate.doPost(WSServletDelegate.java:167)
              at 
com.sun.xml.ws.transport.http.servlet.WSServlet.doPost(WSServlet.java:51)
              at javax.servlet.http.HttpServlet.service(HttpServlet.java:681)
              at javax.servlet.http.HttpServlet.service(HttpServlet.java:764)
              at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)
              at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
              at 
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
              at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
              at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
              at 
org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
              at 
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
              at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
              at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
              at 
org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
              at 
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
              at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
              at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
              at 
org.springframework.boot.web.servlet.support.ErrorPageFilter.doFilter(ErrorPageFilter.java:126)
              at 
org.springframework.boot.web.servlet.support.ErrorPageFilter.access$000(ErrorPageFilter.java:64)
              at 
org.springframework.boot.web.servlet.support.ErrorPageFilter$1.doFilterInternal(ErrorPageFilter.java:101)
              at 
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
              at 
org.springframework.boot.web.servlet.support.ErrorPageFilter.doFilter(ErrorPageFilter.java:119)
              at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
              at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
              at 
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
              at 
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
              at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
              at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
              at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197)
              at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
              at 
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:540)
              at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)
              at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
              at 
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:687)
              at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
              at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:359)
              at 
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399)
              at 
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
              at 
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:889)
              at 
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1735)
              at 
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
              at 
org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
              at 
org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
              at 
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
              at java.lang.Thread.run(Thread.java:748)

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