java.lang.NullPointerException

ciutada.web.ConvocatoriaController.downloadFitxer(ConvocatoriaController.java:167)

jdk.internal.reflect.GeneratedMethodAccessor145.invoke(Unknown Source)

java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

java.base/java.lang.reflect.Method.invoke(Method.java:566)

org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:197)

org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:141)

org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106)

org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:894)

org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808)

org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)

org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1063)

org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963)

org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)

org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)

javax.servlet.http.HttpServlet.service(HttpServlet.java:626)

org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)

javax.servlet.http.HttpServlet.service(HttpServlet.java:733)

org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)

org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)

org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)

org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)

org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)

org.springframework.web.servlet.resource.ResourceUrlEncodingFilter.doFilter(ResourceUrlEncodingFilter.java:67)

org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)

org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)

org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:204)

org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:183)

org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:358)

org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:271)

org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)

org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)

org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:96)

org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)

org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)

org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)

org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)

org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)

org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)

org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)

org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)

org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)

org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542)

org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143)

org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)

org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)

org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:764)

org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357)

org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374)

org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)

org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893)

org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1707)

org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)

java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)

java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)

org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

java.base/java.lang.Thread.run(Thread.java:829)