2

We are facing a strange issue while using servlet 3.0 with WebLogic.

We are using DeferredResult provided by Api. Below Code works fine with Tomcat7. 

@RequestMapping(value = "/search/new", produces = { MediaType.APPLICATION_JSON_VALUE })
public @ResponseBody
DeferredResult<String> getOutagesNew(HttpServletRequest httpRequest, HttpServletResponse response) throws IOException {
        DeferredResult<String> deferredResult = new DeferredResult<String>();   
        deferredResult.setResult("Hello");
        response.setHeader("Access-Control-Allow-Origin", "*");
        return deferredResult;
}

But with WebLogic we get this exception

    java.lang.IllegalStateException: strict servlet API: cannot call getOutputStream
() after getWriter()
        at weblogic.servlet.internal.ServletResponseImpl.getOutputStream(Servlet
ResponseImpl.java:292)
        at javax.servlet.ServletResponseWrapper.getOutputStream(ServletResponseW
rapper.java:138)
        at javax.servlet.ServletResponseWrapper.getOutputStream(ServletResponseW
rapper.java:138)
        at org.springframework.security.web.context.SaveContextOnUpdateOrErrorRe
sponseWrapper.getOutputStream(SaveContextOnUpdateOrErrorResponseWrapper.java:100
)
        at org.springframework.http.server.ServletServerHttpResponse.getBody(Ser
vletServerHttpResponse.java:71)
        at org.springframework.http.converter.StringHttpMessageConverter.writeIn
ternal(StringHttpMessageConverter.java:108)
        at org.springframework.http.converter.StringHttpMessageConverter.writeIn
ternal(StringHttpMessageConverter.java:42)
        at org.springframework.http.converter.AbstractHttpMessageConverter.write
(AbstractHttpMessageConverter.java:179)
        at org.springframework.web.servlet.mvc.method.annotation.AbstractMessage
ConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMeth
odProcessor.java:148)
        at org.springframework.web.servlet.mvc.method.annotation.AbstractMessage
ConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMeth
odProcessor.java:90)
        at org.springframework.web.servlet.mvc.method.annotation.RequestResponse
BodyMethodProcessor.handleReturnValue(RequestResponseBodyMethodProcessor.java:18
9)

Please help

4

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