From: Greg Chicares <gchicares@sbcglobal.net>
To: cygwin@cygwin.com
Subject: Re: subversion 1.9.3-1 segfault
Date: Sat, 20 Feb 2016 02:41:00 -0000 [thread overview]
Message-ID: <56C7D26A.1090507@sbcglobal.net> (raw)
In-Reply-To: <56C742BD.3040503@acm.org>
On 2016-02-19 16:28, David Rothenberger wrote:
> Greg Chicares wrote:
[...]
>> /lmi/mirror/lmi[1]$svn update
>> Updating '.':
>> zsh: segmentation fault (core dumped) svn update
[...non-helpful stackdump...]
>> I'll try running 'svn' under 'gdb'. Is there anything else I can do to help?
>
> That's the only other thing I can think of. If you can catch the
> segfault and get a backtrace, I may be able to track it down.
Thanks. The problem is no longer occurring. Let me state what I
know for the record in case it helps someone else someday.
This seems to be a heisenbug. When I ran it under gdb, repeatedly,
it refused to segfault. Outside gdb, with subversion-debuginfo
installed, I was unable to get a useful stackdump.
The problem has occurred only when gnu.org's svn server is slow:
on one isolated occasion a week or two ago, and throughout today.
And today there seems to have been a DDOS attack on gnu.org:
https://savannah.gnu.org/support/?108973
While the problem lasted, sometimes I got one or both of these
messages:
svn: E170013: Unable to connect to a repository
svn: E175012: Connection timed out
and sometimes svn segfaulted with no message. I tried the same
operations on my debian-7 ("wheezy") system with its older
svn-1.6.17, where I got timeouts but no segfault.
My real problem was the gnu.org server. I can only conjecture
that attempting to work with a server under extreme load causes
svn-1.9.3-1 to follow some exceptional code path that attempts
to report a diagnostic and in doing so sometimes crashes.
--
Problem reports: http://cygwin.com/problems.html
FAQ: http://cygwin.com/faq/
Documentation: http://cygwin.com/docs.html
Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
next prev parent reply other threads:[~2016-02-20 2:41 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-09 17:40 Greg Chicares
2016-02-09 21:05 ` Andrey Repin
2016-02-09 23:07 ` Greg Chicares
2016-02-13 18:41 ` David Rothenberger
2016-02-19 15:59 ` Greg Chicares
2016-02-19 16:30 ` David Rothenberger
2016-02-20 2:41 ` Greg Chicares [this message]
2016-02-22 12:02 ` Jon Turney
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=56C7D26A.1090507@sbcglobal.net \
--to=gchicares@sbcglobal.net \
--cc=cygwin@cygwin.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).