harmony-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Alexei Zakharov" <alexei.zakha...@gmail.com>
Subject Re: [classlib][nio] jetty corrupts big static files
Date Mon, 03 Dec 2007 08:50:41 GMT
Please note it also fails at least on SUSE 10 64bit.

Regards,
Alexei

2007/11/30, Aleksey Shipilev <aleksey.shipilev@gmail.com>:
> Alexei,
>
> It seems like your issue is not reproduced on my RHEL4 systems, while
> on Debian I see exact buggy behavior you described. I'm having a quick
> look now...
>
> Thanks,
> Aleksey.
>
> On Nov 29, 2007 6:50 PM, Aleksey Shipilev <aleksey.shipilev@gmail.com> wrote:
> > Alexei,
> >
> > I have failed to reproduce the issue with r599456 32bit build on both
> > Linux32/64 with both Selector providers and Jetty 6.1.2pre1.
> > Stress tests worked out fine 5 of 5 runs each with 1000 iterations.
> >
> > I've used:
> > Apache Harmony Launcher : (c) Copyright 1991, 2007 The Apache Software
> > Foundation or its licensors, as applicable.
> > java version "1.5.0"
> > pre-alpha : not complete or compatible
> > svn = r599456, (Nov 29 2007), Linux/ia32/gcc 3.4.6, release build
> > http://harmony.apache.org
> >
> > On:
> >  - Linux linux64 2.6.9-55.ELlargesmp #1 SMP Fri Apr 20 16:46:56 EDT
> > 2007 x86_64 x86_64 x86_64 GNU/Linux
> >  - Linux linux32 2.6.9-55.ELsmp #1 SMP Fri Apr 20 17:03:35 EDT 2007
> > i686 i686 i386 GNU/Linux
> >
> > Thanks,
> > Aleksey.
> >
> >
> > On Nov 29, 2007 5:50 PM, Alexei Zakharov <alexei.zakharov@gmail.com> wrote:
> > > Try it on Linux64, I was able to reproduce it very easily there.
> > >
> > > Thanks for doing this,
> > >
> > > Alexei
> > >
> > > 2007/11/29, Aleksey Shipilev <aleksey.shipilev@gmail.com>:
> > > > 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

Mime
View raw message