[jira] [Created] (JUNEAU-80) RestCallHandlerDefault service method calls handleResponse which seems to close output stream right before it runs res.flushbuffer which throws an IO exception because the stream is closed.

["Steve Haertel (JIRA)" <ji...@apache.org>]

Steve Haertel created JUNEAU-80:
-----------------------------------

             Summary: RestCallHandlerDefault service method calls handleResponse which seems to close output stream right before it runs res.flushbuffer which throws an IO exception because the stream is closed.
                 Key: JUNEAU-80
                 URL: https://issues.apache.org/jira/browse/JUNEAU-80
             Project: Juneau
          Issue Type: Bug
          Components: Code
    Affects Versions: 7.0.1
         Environment: Red Hat Enterprise Linux Workstation release 6.9 (Santiago)
WAS Liberty 17.0.0.1, with a CorsFilter web.xml
            Reporter: Steve Haertel
             Fix For: 7.0.1


If I am doing something wrong, please let me know! Please bear with me. I'm not an expert.

I am trying to upgrade some REST infrastructure to use Juneau (7.0.1) and while all REST calls return successfully, I'm always seeing stack traces.

 

{{ java.io.IOException: Stream is closed}}
{{ at com.ibm.ws.http.channel.internal.outbound.HttpOutputStreamImpl.validate(HttpOutputStreamImpl.java:210)}}
{{ at com.ibm.ws.http.channel.internal.outbound.HttpOutputStreamImpl.flush(HttpOutputStreamImpl.java:592)}}
{{ at com.ibm.ws.webcontainer.osgi.response.WCOutputStream.flush(WCOutputStream.java:234)}}
{{ at org.apache.juneau.rest.RestResponse.flushBuffer(RestResponse.java:461)}}
{{ at org.apache.juneau.rest.RestCallHandler.service(RestCallHandler.java:182)}}
{{ at org.apache.juneau.rest.RestCallHandler.service(RestCallHandler.java:129)}}
{{ at org.apache.juneau.rest.RestServlet.service(RestServlet.java:142)}}
{{ at javax.servlet.http.HttpServlet.service(HttpServlet.java:668)}}

 

It looks like the default rest call handler's service method is calling res.flushbuffer() which is throwing an IO exception. For the life of me, I couldn't figure out what was closing the output stream.

 

{{I was wondering if maybe the default 'handleResponse' was somehow closing the response output stream so I made my own RestCallHandler with an Override'd handleResponse which does this:}}

{{try {}}
{{    res.flushBuffer();}}
{{ } catch (IOException e1) {}}
{{    logger.info("***IO ex flush before handle resp.");}}
{{ }}}
{{ try {}}
{{    super.handleResponse(req, res, output);}}
{{} catch (RestException e) {}}
{{    logger.info("***REST ex from handle resp.");}}
{{ } catch (IOException e) {}}
{{    logger.info("***IO ex from handle resp.");}}
{{ }}}
{{ try {}}
{{    res.flushBuffer();}}
{{ } catch (IOException e1) {}}
{{    logger.info("***IO ex flush after handle resp.");}}
{{ }}}

 

and sure enough, I got "***IO ex flush *after* handle resp." in my log.

 

It seems that handleResponse is closing the response output stream. I did a little bit more looking, and I see that DefaultHandler has a 'os.close()' in it.

 

Is this the culprit of my issue? (Or am I going about this wrong).



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