From: Eric Wong <e@80x24.org>
To: 伊藤洋也 <hiroyan@gmail.com>
Cc: mogilefs-client-public@bogomips.org
Subject: Re: JRuby 9.0.4.0 + mogilefs-client
Date: Wed, 2 Dec 2015 20:53:43 +0000 [thread overview]
Message-ID: <20151202205343.GA5690@dcvr.yhbt.net> (raw)
In-Reply-To: <CAHQkfaqcjVdjXATmyOz_yNRDgCdOJUN3pUWMURhd3zpBCNYLdw@mail.gmail.com>
伊藤洋也 <hiroyan@gmail.com> wrote:
> The same problem has been issued and discussed on GitHub jruby/jruby
> https://github.com/jruby/jruby/issues/1694, but not been resolved yet.
>
> It might not be appropriate to ask you about this problem since it
> does not seem to be the problem of mogilfs-client but of jruby, but do
> you have any ideas?
I can help with nearly any userspace <-> kernel issues on GNU/Linux
and maybe FreeBSD. However, I don't know C++ or Java at all,
so I'm not sure what your JVM or JRuby is doing...
Under Linux, it would be helpful to compare strace output between
C Ruby and JRuby with the test script below (and variations from
making adjustments where I left "XXX" comments).
Does retrying connect_nonblock on EINPROGRESS/EALREADY help?
In other words, something like this:
require 'socket'
require 'io/wait'
sock = Socket.new(Socket::AF_INET, Socket::SOCK_STREAM, 0)
addr = Socket.sockaddr_in(7001, '127.0.0.1')
begin
# XXX it would be worth trying sock.connect(addr) instead
# and compare strace output between C Ruby and JRuby, too
sock.connect_nonblock(addr)
rescue Errno::EINPROGRESS, Errno::EALREADY => e
warn "waiting on #{e.class}"
# XXX Maybe you need to comment out this line on JRuby?
# Ideally you wouldn't need the timeout arg for wait_writable
sock.wait_writable(0.001)
retry
rescue Errno::EISCONN
warn "Success!"
end
unless sock.wait_writable(5)
raise 'MogileFS::Timeout, socket connect timeout'
end
----------------
And based on the comments on that ticket, it might be a problem
with the JVM or JRuby mishandling the issue...
Regardless of whether I can help, thank you for documenting the
issue publically.
next prev parent reply other threads:[~2015-12-02 20:52 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-02 14:24 JRuby 9.0.4.0 + mogilefs-client 伊藤洋也
2015-12-02 20:53 ` Eric Wong [this message]
2016-08-31 2:30 ` Eric Wong
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