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This is transfer of a 10MB file and the corruption happens with the same pattern. Below you have the offset of the write requests as seen by the EOS OFS layer:
210223 16:19:12 time=1614093552.121915 func=Open level=DEBUG logid=7b95ac2c-75ea-11eb-a4c9-fa163ec4aef9 [log in to unmask]:1095 tid=00007fa7f28fc700 source=ReplicaParLayout:163 tident=? sec= uid=0 gid=0 name= geo="" added replica_url=root://p06636710r84969.cern.ch:1095///eos/opstest/dteam/ggus150647/file.10mb_adlerf031dcb7_triumf_src_1a7d0635-873c-4aca-b7d0-b9bc360693f9?&cap.sym=v/TsLkR+AYK5TGUAdartlwDahHY=&cap.msg=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&mgm.logid=7b95ac2c-75ea-11eb-a4c9-fa163ec4aef9&mgm.replicaindex=0&mgm.replicahead=0&mgm.etag="1278278589715841024:00000000"&mgm.id=11bd5b9ad&authz=Bearer%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&mgm.path=/eos/opstest/dteam/ggus150647/file.10mb_adlerf031dcb7_triumf_src_1a7d0635-873c-4aca-b7d0-b9bc360693f9, index=0
210223 16:19:13 time=1614093553.861754 func=write level=DEBUG logid=7b95ac2c-75ea-11eb-a4c9-fa163ec4aef9 [log in to unmask]:1095 tid=00007fa7f28fc700 source=XrdFstOfsFile:788 tident=? sec= uid=18118 gid=2688 name=nobody geo="" rc=1048576 offset=0 size=1048576
210223 16:19:13 time=1614093553.997379 func=write level=DEBUG logid=7b95ac2c-75ea-11eb-a4c9-fa163ec4aef9 [log in to unmask]:1095 tid=00007fa7f28fc700 source=XrdFstOfsFile:788 tident=? sec= uid=18118 gid=2688 name=nobody geo="" rc=1048576 offset=1048576 size=1048576
210223 16:19:14 time=1614093554.133913 func=write level=DEBUG logid=7b95ac2c-75ea-11eb-a4c9-fa163ec4aef9 [log in to unmask]:1095 tid=00007fa7f28fc700 source=XrdFstOfsFile:788 tident=? sec= uid=18118 gid=2688 name=nobody geo="" rc=1048576 offset=2097152 size=1048576
210223 16:19:14 time=1614093554.135736 func=write level=DEBUG logid=7b95ac2c-75ea-11eb-a4c9-fa163ec4aef9 [log in to unmask]:1095 tid=00007fa7f28fc700 source=XrdFstOfsFile:788 tident=? sec= uid=18118 gid=2688 name=nobody geo="" rc=1048576 offset=3145728 size=1048576
210223 16:19:14 time=1614093554.137479 func=write level=DEBUG logid=7b95ac2c-75ea-11eb-a4c9-fa163ec4aef9 [log in to unmask]:1095 tid=00007fa7f28fc700 source=XrdFstOfsFile:788 tident=? sec= uid=18118 gid=2688 name=nobody geo="" rc=1048576 offset=4194304 size=1048576
210223 16:19:14 time=1614093554.268718 func=write level=DEBUG logid=7b95ac2c-75ea-11eb-a4c9-fa163ec4aef9 [log in to unmask]:1095 tid=00007fa7f28fc700 source=XrdFstOfsFile:788 tident=? sec= uid=18118 gid=2688 name=nobody geo="" rc=1048576 offset=5242880 size=1048576
210223 16:19:14 time=1614093554.272175 func=write level=DEBUG logid=7b95ac2c-75ea-11eb-a4c9-fa163ec4aef9 [log in to unmask]:1095 tid=00007fa7f28fc700 source=XrdFstOfsFile:788 tident=? sec= uid=18118 gid=2688 name=nobody geo="" rc=1048576 offset=6291456 size=1048576
210223 16:19:14 time=1614093554.404209 func=write level=DEBUG logid=7b95ac2c-75ea-11eb-a4c9-fa163ec4aef9 [log in to unmask]:1095 tid=00007fa7f28fc700 source=XrdFstOfsFile:788 tident=? sec= uid=18118 gid=2688 name=nobody geo="" rc=1048576 offset=7340032 size=1048576
210223 16:19:14 time=1614093554.405780 func=write level=DEBUG logid=7b95ac2c-75ea-11eb-a4c9-fa163ec4aef9 [log in to unmask]:1095 tid=00007fa7f28fc700 source=XrdFstOfsFile:788 tident=? sec= uid=18118 gid=2688 name=nobody geo="" rc=1048576 offset=8388608 size=1048576
210223 16:19:14 time=1614093554.543100 func=write level=DEBUG logid=7b95ac2c-75ea-11eb-a4c9-fa163ec4aef9 [log in to unmask]:1095 tid=00007fa7f28fc700 source=XrdFstOfsFile:788 tident=? sec= uid=18118 gid=2688 name=nobody geo="" rc=1048576 offset=9437184 size=1048576
210223 16:19:14 time=1614093554.543127 func=_close level=INFO logid=7b95ac2c-75ea-11eb-a4c9-fa163ec4aef9 [log in to unmask]:1095 tid=00007fa7f28fc700 source=XrdFstOfsFile:1149 tident=? sec= uid=18118 gid=2688 name=nobody geo="" viaDelete=0 writeDelete=0
210223 16:19:14 time=1614093554.543139 func=VerifyChecksum level=DEBUG logid=7b95ac2c-75ea-11eb-a4c9-fa163ec4aef9 [log in to unmask]:1095 tid=00007fa7f28fc700 source=XrdFstOfsFile:2957 tident=? sec= uid=18118 gid=2688 name=nobody geo="" isrw=1 max-offset=10485760 opensize=0
210223 16:19:14 time=1614093554.543148 func=VerifyChecksum level=INFO logid=7b95ac2c-75ea-11eb-a4c9-fa163ec4aef9 [log in to unmask]:1095 tid=00007fa7f28fc700 source=XrdFstOfsFile:3017 tident=? sec= uid=18118 gid=2688 name=nobody geo="" (write) checksum type: adler checksum hex: 189bcc56 requested-checksum hex: -none-
210223 16:19:14 time=1614093554.543212 func=_close level=DEBUG logid=7b95ac2c-75ea-11eb-a4c9-fa163ec4aef9 [log in to unmask]:1095 tid=00007fa7f28fc700 source=XrdFstOfsFile:1231 tident=? sec= uid=18118 gid=2688 name=nobody geo="" checksumerror = 0, targetsizerror= 0,mMaxOffsetWritten = 10485760, targetsize = 0
It all looks correct to me. The corresponding FTS transfer is here:
https://fts-pilot-006.cern.ch:8449/var/log/fts3/transfers/2021-02-23/webdav.lcg.triumf.ca__eospps.cern.ch/2021-02-23-1519__webdav.lcg.triumf.ca__eospps.cern.ch__1448495912__79cbcb7e-75ea-11eb-aea2-fa163ece561c
For reference you can find attached the hexdump of the correct file and the corrupted one, if you want to look into more detail on the corruption pattern.
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