xrdHttp does not support checksumming #711
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Hi Oliver,
No, you're not missing anything. It's a well known limitation of the http
plugin. It does not return the checksum via propfind or any other
mechanism. I believe the developer is looking into it.
Andy
…On Wed, 23 May 2018, Oliver Freyermuth wrote:
Attempting Grid transfers, the other end issues a request such as:
```
180523 14:44:58 144824 sysXrdHttp: rc:111 got hdr line: HEAD /cephfs/grid/atlas/atlaslocalgroupdisk/rucio/mc15_13TeV/0b/59/EVNT.13048527._000001.pool.root.1 HTTP/1.1
180523 14:44:58 144824 sysXrdHttp: Parsing first line: HEAD /cephfs/grid/atlas/atlaslocalgroupdisk/rucio/mc15_13TeV/0b/59/EVNT.13048527._000001.pool.root.1 HTTP/1.1
180523 14:44:58 144824 sysXrdHttp: rc:57 got hdr line: User-Agent: fts_url_copy/3.7.8 gfal2/2.15.4 neon/0.0.29
180523 14:44:58 144824 sysXrdHttp: rc:14 got hdr line: Keep-Alive:
180523 14:44:58 144824 sysXrdHttp: rc:24 got hdr line: Connection: Keep-Alive
180523 14:44:58 144824 sysXrdHttp: rc:14 got hdr line: TE: trailers
180523 14:44:58 144824 sysXrdHttp: rc:41 got hdr line: Host: xrootd001.physik.uni-bonn.de:1094
180523 14:44:58 144824 sysXrdHttp: rc:22 got hdr line: Want-Digest: ADLER32
180523 14:44:58 144824 sysXrdHttp: rc:83 got hdr line: ClientInfo: job-id=6f242aab-f121-5a1c-89b0-1dfb01d96abb;file-id=781292397;retry=0
180523 14:44:58 144824 sysXrdHttp: rc:2 got hdr line:
180523 14:44:58 144824 sysXrdHttp: rc:2 detected header end.
```
However, xrootd only replies with the filesize, as can be seen in https://github.com/xrootd/xrootd/blob/f4860902138e2d791ac4873a28de3117bd79a182/src/XrdHttp/XrdHttpReq.cc#L1434 and from the logs:
```
180523 14:44:58 144824 ***@***.*** ofs_stat: fn=/cephfs/grid/atlas/atlaslocalgroupdisk/rucio/mc15_13TeV/0b/59/EVNT.13048527._000001.pool.root.1
180523 14:44:58 144824 ***@***.*** XrootdProtocol: 0000 rc=0 stat /cephfs/grid/atlas/atlaslocalgroupdisk/rucio/mc15_13TeV/0b/59/EVNT.13048527._000001.pool.root.1
180523 14:44:58 144824 ***@***.*** XrootdResponse: 0000 sending 42 data bytes
180523 14:44:58 144824 sysXrdHttp: XrdHttpReq::Data! final=0
```
Checksumming in general is activated in the configuration:
```
xrootd.chksum adler32 crc32 md5
```
Is this a missing feature or am I missing something?
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Hi Andy, thanks - it was not yet well-known to me (absence of features are also hard to document, and there was no issue yet). So many thanks a lot for the clarification! |
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Hi, did you use the master branch? f |
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@ffurano Nice, that's good to know, thanks for pointing this out! So maybe the next release will be faster than us ;-). |
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Good point. So, I think this issue is closed because support exists and will likely appear in R 4.9 which will be here within 2 months. |
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Attempting Grid transfers, the other end issues a request such as:
However, xrootd only replies with the filesize, as can be seen in
xrootd/src/XrdHttp/XrdHttpReq.cc
Line 1434 in f486090
Checksumming in general is activated in the configuration:
Is this a missing feature or am I missing something?
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