csierra commented on issue #398: [Draft] SSE implementation using AsyncContext URL: https://github.com/apache/cxf/pull/398#issuecomment-380052012 hey @andymc12 @reta, I was not very acquainted with the test infra. I made some debugging and I found Jackson ObjectWriter to generate this expection: ```java.lang.NullPointerException at org.apache.coyote.http11.InternalNioOutputBuffer.flushBuffer(InternalNioOutputBuffer.java:234) at org.apache.coyote.http11.InternalNioOutputBuffer.addToBB(InternalNioOutputBuffer.java:189) at org.apache.coyote.http11.InternalNioOutputBuffer.commit(InternalNioOutputBuffer.java:177) at org.apache.coyote.http11.AbstractHttp11Processor.action(AbstractHttp11Processor.java:740) at org.apache.coyote.Response.action(Response.java:179) at org.apache.coyote.Response.sendHeaders(Response.java:350) at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:335) at org.apache.catalina.connector.OutputBuffer.flush(OutputBuffer.java:317) at org.apache.catalina.connector.CoyoteOutputStream.flush(CoyoteOutputStream.java:110) at com.fasterxml.jackson.core.json.UTF8JsonGenerator.flush(UTF8JsonGenerator.java:1100) at com.fasterxml.jackson.databind.ObjectWriter.writeValue(ObjectWriter.java:915) at com.fasterxml.jackson.jaxrs.base.ProviderBase.writeTo(ProviderBase.java:625) at org.apache.cxf.jaxrs.sse.OutboundSseEventBodyWriter.writePayloadTo(OutboundSseEventBodyWriter.java:139) at org.apache.cxf.jaxrs.sse.OutboundSseEventBodyWriter.writeTo(OutboundSseEventBodyWriter.java:112) at org.apache.cxf.jaxrs.sse.OutboundSseEventBodyWriter.writeTo(OutboundSseEventBodyWriter.java:40) at org.apache.cxf.jaxrs.sse.SseEventSinkImpl.dequeue(SseEventSinkImpl.java:124) at org.apache.catalina.core.AsyncContextImpl$RunnableWrapper.run(AsyncContextImpl.java:571) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748)``` this seems to be what is preventing tests from passing 😕
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