URL:
<http://savannah.cern.ch/bugs/?78973>
Summary: xproofd segfaulting in the xrootd fork handler
Project: XROOTD
Submitted by: ljanyst
Submitted on: 2011-03-03 15:28
Category: None
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: None
Status: None
Privacy: Public
Assigned to: ljanyst
Originator Email:
Open/Closed: Open
Discussion Lock: Any
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Details:
++ CUT ++
On Wed, Mar 02, 2011 at 06:01:53PM -0600, Chris Jones wrote:
In our xrootd5.27.06b-cms3 version of xrootd we added a modification from
the xrootd developers to deal with 'fork'ing. However, when xproofd does its
fork a pre-condition expected by the xrootd code does not hold and the code
tries to talk to a null C++ object. However, I think this could easily be
fixed by changing the file XrdClient/XrdClientEnv.cc such that before every
call to 'ConnectionManager' the code first does
if( 0 != ConnectionManager ) { .... }
-- CUT --
++ CUT ++
2011/3/3 Lukasz Janyst <[log in to unmask]>:
This is one of the reasons why the final version of the patch that has made
it to the xroot repository is sligthly different that the one you got: the
fork handlers are disabled by default and one can enable them by setting an
environment flag:
http://xrootd.cern.ch/cgi-bin/cgit.cgi/xrootd/patch/?id=953079e8605f58f0500e6b4ed774a8ed91a75671
I can also add the check suggested by Chris just to be extra careful.
-- CUT --
++ CUT ++
2011/3/3 Peter Elmer <[log in to unmask]>:
Ok, it looks like the environment for this fix is something we can turn on
programmatically (and not via an envvar, which we don't use for
configuration), is that correct? What is the reason for making it disabled by
default? Is there a penalty for using it in the non-fork cases or is this just
"caution" because it is a new/experimental feature?
-- CUT --
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