WARNING: . . . .failed verification -- update discarded (will try again).

[Carlos Carvalho]

JW (jw at mailsw.com) wrote on 3 June 2009 11:58:
 >A nightly scripted rsync backup job is giving me this error
 >
 >WARNING: vm/escDebLenny14G-flat.vmdk failed verification -- update discarded 
 >(will try again).
 >
 >I've searched the web and I think probably the problem is the source file 
 >changed during the copy.
 >
 >However, I haven't seen any explanations for the "will try again" part. 
 >
 >Does it try again immediately?
 >
 >If so, does a  lack of further errors mean that it succeeded on the retry?

After pulling a file rsync verifies its checksum; if it fails rsync
tries once more, and if it still fails rsync gives up and reports the
error. Therefore if there is no final error message the file was
successfully pulled.

This is explained in http://rsync.samba.org/how-rsync-works.html