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java.lang.IllegalStateException: getWriter() has already been called for this response at org.apache.catalina.connector.Response.getOutputStream(Response.java:576) at org.apache.catalina.connector.ResponseFacade.getOutputStream(ResponseFacade.java:181) at javax.servlet.ServletResponseWrapper.getOutputStream(ServletResponseWrapper.java:102) at net.bull.javamelody.CounterResponseStream.<init>(CounterResponseStream.java:39) at net.bull.javamelody.CounterServletResponseWrapper.createOutputStream(CounterServletResponseWrapper.java:76) at net.bull.javamelody.FilterServletResponseWrapper.getOutputStream(FilterServletResponseWrapper.java:110) at javax.servlet.ServletResponseWrapper.getOutputStream(ServletResponseWrapper.java:102) at org.kohsuke.stapler.ResponseImpl.getOutputStream(ResponseImpl.java:82) at org.kohsuke.stapler.Stapler.serveStaticResource(Stapler.java:405) at org.kohsuke.stapler.Stapler.serveStaticResource(Stapler.java:242) at org.kohsuke.stapler.Stapler.service(Stapler.java:150) at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:94) at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:151) at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:129) at net.bull.javamelody.PluginMonitoringFilter.doFilter(PluginMonitoringFilter.java:73) at org.jvnet.hudson.plugins.monitoring.HudsonMonitoringFilter.doFilter(HudsonMonitoringFilter.java:46) at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:97)