[Fatal Error] :1:1: Content is not allowed in prolog

Issue

• jbosseap-stdout.log size is growing large more than 50GB due to the error.

2025-02-13 14:00:01,182 ERROR [stderr] (default task-20267) [Fatal Error] :1:1: Content is not allowed in prolog.
2025-02-13 14:00:01,182 ERROR [stderr] (default task-20267) org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 1; Content is not allowed in prolog.
2025-02-13 14:00:01,182 ERROR [stderr] (default task-20267)     at org.apache.xerces.parsers.DOMParser.parse(DOMParser.java:245)
2025-02-13 14:00:01,182 ERROR [stderr] (default task-20267)     at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:298)
2025-02-13 14:00:01,182 ERROR [stderr] (default task-20267)     at com.example.wfexternal.xmlapi.XmlLog.StringToDocument(XmlLog.java:127)
2025-02-13 14:00:01,182 ERROR [stderr] (default task-20267)     at com.example.wfexternal.xmlapi.XmlLog.XmlForLog(XmlLog.java:59)
2025-02-13 14:00:01,182 ERROR [stderr] (default task-20267)     at ExternalServlet.service(ExternalServlet.java:302)
2025-02-13 14:00:01,182 ERROR [stderr] (default task-20267)     at javax.servlet.http.HttpServlet.service(HttpServlet.java:791)
2025-02-13 14:00:01,182 ERROR [stderr] (default task-20267)     at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:74)
2025-02-13 14:00:01,182 ERROR [stderr] (default task-20267)     at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
2025-02-13 14:00:01,182 ERROR [stderr] (default task-20267)     at io.undertow.servlet.handlers.ServletChain$1.handleRequest(ServletChain.java:68)
2025-02-13 14:00:01,182 ERROR [stderr] (default task-20267)     at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
2025-02-13 14:00:01,182 ERROR [stderr] (default task-20267)     at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
2025-02-13 14:00:01,182 ERROR [stderr] (default task-20267)     at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
2025-02-13 14:00:01,182 ERROR [stderr] (default task-20267)     at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:132)
2025-02-13 14:00:01,182 ERROR [stderr] (default task-20267)     at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
2025-02-13 14:00:01,182 ERROR [stderr] (default task-20267)     at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
2025-02-13 14:00:01,182 ERROR [stderr] (default task-20267)     at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
2025-02-13 14:00:01,182 ERROR [stderr] (default task-20267)     at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
2025-02-13 14:00:01,182 ERROR [stderr] (default task-20267)     at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
2025-02-13 14:00:01,182 ERROR [stderr] (default task-20267)     at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
2025-02-13 14:00:01,198 ERROR [stderr] (default task-20267)     at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
2025-02-13 14:00:01,198 ERROR [stderr] (default task-20267)     at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
2025-02-13 14:00:01,198 ERROR [stderr] (default task-20267)     at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
2025-02-13 14:00:01,198 ERROR [stderr] (default task-20267)     at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
2025-02-13 14:00:01,198 ERROR [stderr] (default task-20267)     at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
2025-02-13 14:00:01,198 ERROR [stderr] (default task-20267)     at org.wildfly.extension.undertow.deployment.GlobalRequestControllerHandler.handleRequest(GlobalRequestControllerHandler.java:68)
2025-02-13 14:00:01,198 ERROR [stderr] (default task-20267)     at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
2025-02-13 14:00:01,198 ERROR [stderr] (default task-20267)     at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:292)
2025-02-13 14:00:01,198 ERROR [stderr] (default task-20267)     at io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:81)
2025-02-13 14:00:01,198 ERROR [stderr] (default task-20267)     at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:138)
2025-02-13 14:00:01,198 ERROR [stderr] (default task-20267)     at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:135)
2025-02-13 14:00:01,213 ERROR [stderr] (default task-20267)     at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
2025-02-13 14:00:01,213 ERROR [stderr] (default task-20267)     at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
2025-02-13 14:00:01,213 ERROR [stderr] (default task-20267)     at org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create$0(SecurityContextThreadSetupAction.java:105)
2025-02-13 14:00:01,213 ERROR [stderr] (default task-20267)     at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1502)
2025-02-13 14:00:01,229 ERROR [stderr] (default task-20267)     at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1502)
2025-02-13 14:00:01,229 ERROR [stderr] (default task-20267)     at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1502)
2025-02-13 14:00:01,229 ERROR [stderr] (default task-20267)     at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1502)
2025-02-13 14:00:01,245 ERROR [stderr] (default task-20267)     at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:272)
2025-02-13 14:00:01,245 ERROR [stderr] (default task-20267)     at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)
2025-02-13 14:00:01,245 ERROR [stderr] (default task-20267)     at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:104)
2025-02-13 14:00:01,245 ERROR [stderr] (default task-20267)     at io.undertow.server.Connectors.executeRootHandler(Connectors.java:360)
2025-02-13 14:00:01,245 ERROR [stderr] (default task-20267)     at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:830)
2025-02-13 14:00:01,245 ERROR [stderr] (default task-20267)     at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
2025-02-13 14:00:01,260 ERROR [stderr] (default task-20267)     at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1985)
2025-02-13 14:00:01,260 ERROR [stderr] (default task-20267)     at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1487)
2025-02-13 14:00:01,260 ERROR [stderr] (default task-20267)     at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1378)
2025-02-13 14:00:01,260 ERROR [stderr] (default task-20267)     at java.lang.Thread.run(Thread.java:748)