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Hi Andy, > So, indeed, if you can provide the setup your doing it would help. Here's the full config I use: [xrootd.txt](https://github.com/xrootd/xrootd/files/4927650/xrootd.txt) > Could you post a trivial test that provokes this issue? Well, not really trivial... The reliable reproducer is to run something like: ``` gfal-copy -vvv -f -K adler32 --checksum-mode both davs://srmdav.ific.uv.es:8443/webdav/lustre/ific.uv.es/grid/atlas/atlaslocalgroupdisk/rucio/user/cescobar/ed/65/user.cescobar.21356729._000011.out.root davs://xrootd-dev.physik.uni-bonn.de:1094/data/grid/atlas/user/scratch/foo ``` with the target machine (`xrootd-dev`) being firewalled. This means I force `davix` to connect many times, i.e. check file existence, delete the file if it already exists, try a push (which will fail due to the firewall), try a pull (which will fail since the source did not provide a macaroon) and finally falling back to a streamed copy. In the end, this is just a nasty hack to force davix to create many connections in series. With this command, I do reliable get a crash (or even two) > 90 % of the time. I'm not aware of an easy way to force davix directly to do that via commandline, though :-(. Cheers, Oliver -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/xrootd/xrootd/issues/1252#issuecomment-658983191 ######################################################################## 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