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

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java.lang.NullPointerException:
at org.apache.catalina.connector.http.HttpResponseStream.checkHead(HttpResponseStream.java:253)
at org.apache.catalina.connector.http.HttpResponseStream.(HttpResponseStream.java:104)
at org.apache.catalina.connector.http.HttpResponseImpl.createOutputStream(HttpResponseImpl.java:220)
at org.apache.catalina.connector.ResponseBase.getOutputStream(ResponseBase.java:725)
at org.apache.catalina.connector.ResponseBase.finishResponse(ResponseBase.java:469)
at org.apache.catalina.connector.http.HttpResponseImpl.finishResponse(HttpResponseImpl.java:288)
at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1039)
at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1107)
at java.lang.Thread.run(Thread.java:479)

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