[JIRA] (JENKINS-10524) winstone.ClientSocketException: Failed to write to client

Fri, 22 Feb 2013 11:44:01 -0800

Jesse Glick commented on Bug JENKINS-10524

I have been tormented by similar exceptions (usually java.net.SocketException: Connection reset, but sometimes also java.io.IOException: Broken pipe from Jetty in 1.457 IIRC), which pollute the log file with junk.

org.kohsuke.stapler.compression.CompressionFilter.reportException is what actually sends the log record. Not sure what “code is written such that we simply swallow this exception”.

Unfortunately I have not yet managed to reproduce the problem in a controlled environment. Have tried installing a plugin with

@Extension
public class XXX extends PageDecorator {
    public void sleep() throws InterruptedException, IOException {
        Stapler.getCurrentResponse().flushBuffer();
        Thread.sleep(5000);
    }
}


and a matching footer.jelly





<?xml version="1.0" encoding="UTF-8"?>
<?jelly escape-by-default='true'?>
<j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:i="jelly:fmt">
    <hr/>
    Sleeping…
    ${it.sleep()}
    done.
</j:jelly>





which makes a page take a long time to load, but halting it halfway prints nothing to the Jenkins console. Installing the Monitoring plugin changes nothing. Tried Jenkins trunk, 1.480.3, 1.466.2. Tried Stop button in Chrome, as well as running curl and interrupting the process before the page finishes loading.



So if I can ever figure out how to reproduce this, I will try to patch reportException to check for exceptions (incl. nested causes) that seem to indicate a broken socket, and if so not send them to LOGGER (or use FINE rather than WARNING).
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