java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at com.ibm.ws.webcontainer.srt.SRTServletResponse.setContentType(SRTServletResponse.java:1141)
at sun.reflect.GeneratedMethodAccessor635.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:618)
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)
at groovy.lang.MetaClassImpl.setProperty(MetaClassImpl.java:2395)
at groovy.lang.ExpandoMetaClass.setProperty(ExpandoMetaClass.java:1129)
at groovy.lang.MetaClassImpl.setProperty(MetaClassImpl.java:3315)
at org.codehaus.groovy.runtime.InvokerHelper.setProperty(InvokerHelper.java:183)
at org.grails.plugin.resource.ResourceProcessor.processModernResource(ResourceProcessor.groovy:293)
at org.grails.plugin.resource.ResourceProcessor$processModernResource.call(Unknown Source)
at org.grails.plugin.resource.ProcessingFilter.doFilter(ProcessingFilter.groovy:39)
at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:190)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:237)
at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:190)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:130)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java:87)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:837)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.invokeFilters(WebAppFilterManager.java:747)
at com.ibm.ws.wswebcontainer.filter.WebAppFilterManager.invokeFilters(WebAppFilterManager.java:115)
at com.ibm.ws.webcontainer.extension.DefaultExtensionProcessor.invokeFilters(DefaultExtensionProcessor.java:849)
at com.ibm.ws.webcontainer.extension.DefaultExtensionProcessor.handleRequest(DefaultExtensionProcessor.java:785)
at com.ibm.ws.wswebcontainer.extension.DefaultExtensionProcessor.handleRequest(DefaultExtensionProcessor.java:113)
at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:3507)
at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:269)
at com.ibm.ws.wswebcontainer.WebContainer.handleRequest(WebContainer.java:1466)
at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:122)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:458)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:387)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:267)
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminators(NewConnectionInitialReadCallback.java:214)
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:113)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
at com.ibm.io.async.AsyncChannelFuture$1.run(AsyncChannelFuture.java:205)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1497)

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