4.) I have three threads "runnable":

"XNIO-1 Accept@6446" prio=5 tid=0x21 nid=NA runnable

java.lang.Thread.State: RUNNABLE

at sun.nio.ch.EPollArrayWrapper.epollWait(EPollArrayWrapper.java:-1)

at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)

at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:93)

at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)

- locked <merged>(a sun.nio.ch.EPollSelectorImpl)

- locked <merged>(a java.util.Collections$UnmodifiableSet)

- locked <merged>(a sun.nio.ch.Util$3)

at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)

at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:101)

at org.xnio.nio.WorkerThread.run(WorkerThread.java:509)

"XNIO-1 I/O-7@6448" prio=5 tid=0x1f nid=NA runnable

java.lang.Thread.State: RUNNABLE

at sun.nio.ch.EPollArrayWrapper.epollWait(EPollArrayWrapper.java:-1)

at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)

at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:93)

at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)

- locked <merged>(a sun.nio.ch.EPollSelectorImpl)

- locked <merged>(a java.util.Collections$UnmodifiableSet)

- locked <merged>(a sun.nio.ch.Util$3)

at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)

at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:101)

at org.xnio.nio.WorkerThread.run(WorkerThread.java:509)

"XNIO-1 I/O-3@6452" prio=5 tid=0x1b nid=NA runnable

java.lang.Thread.State: RUNNABLE

at sun.nio.ch.EPollArrayWrapper.epollWait(EPollArrayWrapper.java:-1)

at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)

at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:93)

at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)

- locked <0x1953> (a sun.nio.ch.EPollSelectorImpl)

- locked <0x1954> (a java.util.Collections$UnmodifiableSet)

- locked <0x1955> (a sun.nio.ch.Util$3)

at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)

at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:101)

at org.xnio.nio.WorkerThread.run(WorkerThread.java:509)

On Fri, Feb 24, 2017 at 5:15 PM Hicks, Matt <matt@matthicks.com> wrote:

1.) I was running 1.4.10.Final, but I upgraded to 1.4.11.Final hoping it was a bug that was fixed, but it didn't make any difference.
2.) Yes
3.) No, of the 8 virtual CPUs none of them are maxed out.
4.) I'll have to get back to you...

On Fri, Feb 24, 2017 at 5:10 PM Stuart Douglas <sdouglas@redhat.com> wrote:
- What version of Undertow?
- Is SSL in use?
- Does the server enter some kind of spin loop (i.e. 100% CPU usage)?
- What does the stack trace look like when this happens?

Stuart

On Sat, Feb 25, 2017 at 9:14 AM, Hicks, Matt <matt@matthicks.com> wrote:
> I'm uploading files as "multipart/form-data" and using the FormParser as
> follows:
>
> FormParserFactory.builder().build().createParser(exchange).parse(nextHandler)
>
> Sometimes this works fine, but very often my client shows progress up to a
> certain percentage complete (monitoring the AJAX request) and then just
> stops and never kicks to `nextHandler`, leaves the connection just sitting
> there forever, and the server seems to stop accepting any future
> connections.
>
> Any idea what might be causing this?
>
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