 |
 |
Trying the following:
gfal-copy -K adler32 --checksum-mode both -f -vvv -n10 davs://eosatlashttp.cern.ch:443/eos/atlas/atlasgroupdisk/phys-hdbs/dq2/rucio/user/cdeutsch/1b/ab/group.phys-hdbs.21763292._000011.mmc_v1_CxAOD.root https://xrootd.physik.uni-bonn.de:1094//cephfs/grid/atlas/user/scratch/freyermu/foo
repeatedly against a busy XRootD 5.0.0 server finally leads to DAVIX repeatedly getting stuck at:
DEBUG Davix: Request ends.
DEBUG Davix: add old session to cache httpsxrootd002.physik.uni-bonn.de:1094
...
DEBUG Davix: creating session keys... httpsxrootd.physik.uni-bonn.de:1094
DEBUG Davix: cached ne_session found ! taken from cache
DEBUG Davix: configure session...
DEBUG Davix: define connection timeout to 30
...
DEBUG Davix: Doing SSL negotiation.
...
< long waiting time >
...
DEBUG Davix: sess: Closing connection.
DEBUG Davix: sess: Connection closed.
DEBUG Davix: Delete Cached redirection for <HEAD https://xrootd.physik.uni-bonn.de:1094//cephfs/grid/atlas/user/scratch/freyermu/foo https://xrootd002.physik.uni-bonn.de:1094/cephfs/grid/atlas/user/scratch/freyermu/foo>
DEBUG Davix: Disable Session recycling
DEBUG Davix: -> Error when using reycling of session/redirect : cancel and try again
DEBUG Davix: Connection problem: eradicate session
DEBUG Davix: Disable Session recycling
DEBUG Davix: <- negotiateRequest
DEBUG Davix: <- executeRequest
DEBUG Davix: Destroy HttpRequest
DEBUG Davix: (EndRequest)(Libneon) Operation incomplete, kill the connection
On the XRootD server side, we get:
140428540864256:error:140D9115:SSL routines:ssl_get_prev_session:session id context uninitialized:ssl_sess.c:682:
The problem is that the "long waiting time" shown above in FTS transfers already kills the transfer attempt with a failure,
and this happens again and again for every second connection (when there's something cached on the client).
This would likely be different if the connection was terminated forcefully when there are is cached session available (davix will then retry without session caching).
As a workaround:
export DAVIX_DISABLE_SESSION_CACHING=true
works in the gfal environment.
This is not reproducible in my tests with XRootD 4.12.3, even when using identical configuration (as far as possible). I'm using libXrdVoms in both cases.
—
You are receiving this because you are subscribed to this thread.
Reply to this email directly, view it on GitHub, or unsubscribe.
Use REPLY-ALL to reply to list
To unsubscribe from the XROOTD-DEV list, click the following link:
https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-DEV&A=1