FWIW I fist observed the problem today after upgrading from Ubuntu 13.10 to 14.04. The rsync based backup showed this error while processing a big VM image with largely unchanged portions (so delta was active).
Thanks to this bug report, leaving away option -z (and doing compression on SSH level now) made it work again at my side. FYI: rsync remote data source is the (current) Ubuntu 14.04 with standard repos, local destination, which starts rsync via cron (and shows the error output), is my local backup host, a completely updated Wheezy (7.4), using ZFSonLinux BTW. ;) My speculations (I have no prove for anything): Ubuntu shares a good portion of Sid-code with Debian. Looks like 13.10 was unaffected so we have a good chance that 14.04 introduced the problem. Perhaps this allows to narrow down the search. Perhaps it is not directly a rsync based bug, but in a supporting library (libz?) or interoperability issue with the lib. But for me it looks more like an in-memory data corruption issue (off by one, optimization bug or similar). But that is only what my belly says. HTH (I do not need help, as there is a suitable workaround by leaving away -z). Sadly I have no time to look into it more deeply and cannot help further. There is no way to reproduce the problem at my side nor test if it vanished, as it already did. Thank you a lot, Debian, I owe you much. -- -Tino Valentin Hilbig; Am Sportfeld 5; 86482 Aystetten; Germany Tel. +49 821 4865787 http://valentin.hilbig.de/ http://permalink.de/tino/impressum
