Opened 3 months ago

Closed 2 months ago

#3247 closed help (answered)

pptransfer failed checksum

Reported by: m.couldrey Owned by: um_support
Component: Archiving Keywords:
Cc: Platform: JASMIN
UM Version: 10.7



Lately I've been getting failed transfers from XCS-C to my GWS on Jasmin. Note that this is a different issue to the one I raised before in ticket 3244 as far as I can tell.

For example, my suite u-bt507m, cycle 18500401T0000Z has originally failed the on the pptransfer task. The job.err for attempt 01 shows that a pp file bt507a.p618500521.pp checksum test failed. I suppose this means the checksum of the file calculated on Jasmin doesn't match the checksum in the checksums file sent?

When I manually calculate a checksum for this file and check it against the one recorded in the checksums file, the two do not match. The last time this happened, I was able to manually send the file from the XCS to Jasmin and the newly-sent file does have the correct checksum. Retriggering the PPTransfer task then proceeds ok. I was able to do the same procedure again this time.

What concerns me is that this corruption has happened twice in two cycles in a row for this suite (bt507) and once towards the end of my now-complete bq244 suite. Is there some problem with the connection, or with the transfer servers lately? Am I just getting very unlucky? The three other similar suites I ran never had this issue, so it seems like a strange coincidence now.

Many thanks

Change History (3)

comment:1 Changed 3 months ago by grenville


Sadly, I think we'll get nowhere trying to figure out why this has happened - this is why we checksum afterall.


comment:2 Changed 3 months ago by m.couldrey

Hi Grenville.

Ok no worries then, I guess I've just been unlucky and I'll keep on manually sending them. I wasn't expecting a miracle, and thought I should ask in case there was one! Thanks anyway!


comment:3 Changed 2 months ago by grenville

  • Resolution set to answered
  • Status changed from new to closed
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