java.lang.IllegalStateException: getOutputStream() has already been called for this response

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getOutputStream() has already been called for this response
java.lang.IllegalStateException: getOutputStream() has already been called for this response	at org.apache.catalina.connector.Response.getWriter(Response.java:599)	at org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:195)	at javax.servlet.ServletResponseWrapper.getWriter(ServletResponseWrapper.java:111)	at org.apache.jasper.runtime.JspWriterImpl.initOut(JspWriterImpl.java:124)	at org.apache.jasper.runtime.JspWriterImpl.flushBuffer(JspWriterImpl.java:117)	at org.apache.jasper.runtime.PageContextImpl.release(PageContextImpl.java:182)	at org.apache.jasper.runtime.JspFactoryImpl.internalReleasePageContext(JspFactoryImpl.java:115)	at org.apache.jasper.runtime.JspFactoryImpl.releasePageContext(JspFactoryImpl.java:75)	at org.apache.jsp.ui.rawReport_jsp._jspService(rawReport_jsp.java:873)	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)