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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.<init>(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.HttpResponseBase.finishResponse(HttpResponseBase.java:236) 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)