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From "Aleksey Shipilev" <aleksey.shipi...@gmail.com>
Subject Re: [classlib][nio] jetty corrupts big static files
Date Thu, 29 Nov 2007 14:43:46 GMT
I have one wild thought about the origin of this issue, so I'm going
to spend some time for trying.
BTW, I failed to reproduce the crash even on legacy selector on my
r588236 workspace, now I'm updating it to more recent one.

Thanks,
Aleksey.

On Nov 29, 2007 5:40 PM, Alexei Zakharov <alexei.zakharov@gmail.com> wrote:
> Hi Aleksey,
>
> Your provider works better than the default one - VM crash disappears.
> VM runs into the dead loop instead :) BTW it would be great if you can
> have a look at it...
>
> Thanks,
> Alexei
>
> 2007/11/29, Aleksey Shipilev <aleksey.shipilev@gmail.com>:
>
> > Oh sorry, forget it, I should have read JIRA carefully.
> >
> > On Nov 29, 2007 5:11 PM, Aleksey Shipilev <aleksey.shipilev@gmail.com> wrote:
> > > Alexei,
> > >
> > > Can you try epoll()-based Selector [1] as fallback? Please specify
> > > this option on cmdline:
> > > -Djava.nio.channels.spi.SelectorProvider=org.apache.harmony.nio.internal.EpollSelectorProviderImpl
> > >
> > > [1] https://issues.apache.org/jira/browse/HARMONY-4879
> > >
> > >
> > > On Nov 29, 2007 5:06 PM, Alexei Zakharov <alexei.zakharov@gmail.com>
wrote:
> > > > Hi all,
> > > >
> > > > If you keep track of CC reports (either at [1] or by reading
> > > > alerts@harmony.apache.org) then you probably noticed that we have
> > > > intermittent failures of Jetty scenario on Linux'es for quite long
> > > > period of time already. I've spent some time on investigation of this
> > > > failure and found that Jetty-on-Harmony has issues with handling of
> > > > big static files. In most cases it simply returns corrupted data.
> > > > However, sometimes it hangs or even crashes. I've put the detailed
> > > > description of this problem here [2]. In brief I think we have bugs in
> > > > Harmony implementation of NIO selectors. Jetty works ok if its default
> > > > SelectChannelConnector is replaced with any other of its connectors
> > > > like SockerConnector (no NIO) or BlockingChannelConnector (NIO, but no
> > > > selectors). Stack traces also point to problems somewhere in
> > > > Java_org_apache_harmony_luni_platform_OSNetworkSystem_selectImpl .
> > > >
> > > > IMO such issue is rather critical because it prevents default
> > > > configuration of Jetty from working correctly on Harmony.
> > > > Unfortunately I'm not very familiar with NIO code by myself. So I
> > > > think it would be nice if our NIO experts can take a look at it. And
> > > > IMO it would be good to have it fixed till M4.
> > > >
> > > > [1] http://people.apache.org/~mloenko/snapshot_testing/script/snapshots_summary.html
> > > > [2] https://issues.apache.org/jira/browse/HARMONY-5219
> > > >
> > > > Thanks,
> > > > Alexei
> > > >
> > >
> >
>

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