We have a few servers that are exhibiting this behaviour while copying backups sets. I cannot make any of that data available, but have tried producing some /dev/urandom produced data files that exhibit the error and have succeeded in getting something I hope is useful.
I discovered by accident while running a loop that generated and rsyncd test data that interrupting the transfer with ctrl-c produces a failing test case that works without compression but fails with compression. I did not test rigorously, but the files do seem to need to be large, but zero filled seems to be okay. So the test data files I'm attaching are zero filled and only the beginning is random data. Here is a recipe for producing the data # note: needs working ssh to localhost, does not error on a local rsync # setup for test cd ~/ mkdir source dest # create a large file dd if=/dev/zero of=source/random-data-0 bs=1M count=1500 # only need first part of file with random data dd if=/dev/urandom of=source/random-data-0 bs=1M count=50 conv=notrunc # copy it once successfully rsync -vv -ia --inplace --compress --checksum -P source/ localhost:dest/ # change the first part of the file with new data dd if=/dev/urandom of=source/random-data-0 bs=1M count=50 conv=notrunc # copy it again, but break transfer within the first part of file # by typing ctrl-c key during this rsync rsync -vv -ia --inplace --compress --checksum -P source/ localhost:dest/ # rsync again should will exhibit error near transfer break point rsync -vv -ia --inplace --compress --checksum -P source/ localhost:dest/ -- You received this bug notification because you are a member of AIMS, which is subscribed to a duplicate bug report (1431709). https://bugs.launchpad.net/bugs/1384503 Title: rsync fails on large files with compression Status in rsync package in Ubuntu: Fix Released Status in rsync source package in Trusty: Incomplete Bug description: [Status] This issue is currently Incomplete. We're currently blocked on obtaining access to a reliable, and publicly available dataset that can be shared to reproduce the issue. The test is critical to being able to evaluate the impact of the change on other users when assessing if the fix can be SRU'ed to trusty. If you are affected by this bug and can reliably reproduce the issue with a specific dataset that you are willing and permitted to share please comment and specify the dataset location, and how you reproduce the issue. [Original Description] Copying large (>10GB) files with rsync -z (compression) leads to a long hang and eventual error after transferring part of the file. The error is consistent. The file copies at normal speed until it reaches its maximum size (1.4 GB out of 20 GB for one, 6.9 GB out of 29 GB for another). Then nothing happens for a while (many minutes). Finally, there is an error: [....] jh/.VirtualBox/win7/win7.vbox jh/.VirtualBox/win7/win7.vbox-prev jh/.VirtualBox/win7/win7.vdi rsync: [sender] write error: Broken pipe (32) rsync error: error in rsync protocol data stream (code 12) at io.c(837) [sender=3.1.0] In this case, 6.9 GB of 29 GB transferred. Without -z, it works. See the following upstream report, with a comment at the end from the rsync maintainer: https://bugzilla.samba.org/show_bug.cgi?id=10372 According to this report, version 3.1.0 (included in 14.04) uses a different compression package from prior versions. Prior versions did not have this problem for me using the same command on the same systems. Both hosts ran Ubuntu 11.10 at the time, and all run 14.04 now, in each case with all updates applied, Intel hardware. Network connection between them is gigabit ethernet through one switch. A shell ssh between them in a terminal works and stays up during the failure, so it is not a network issue. There are no relevant entries in syslog on either machine. There is sufficient capacity on the receiving disk. All filesystems are ext4. rsync command: /usr/bin/rsync -aHSxvz --delete --stats --exclude=lost+found --exclude=.gvfs --exclude=/nonlaptop /home/ backup.host.edu:/bu/host/home/ (yes, I changed the machine names) Current release (both hosts): Description: Ubuntu 14.04.1 LTS Release: 14.04 Current package (both hosts): rsync: Installed: 3.1.0-2ubuntu0.1 Candidate: 3.1.0-2ubuntu0.1 Version table: *** 3.1.0-2ubuntu0.1 0 500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages 500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages 100 /var/lib/dpkg/status 3.1.0-2 0 500 http://us.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages Thanks, --jh-- To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/rsync/+bug/1384503/+subscriptions -- Mailing list: https://launchpad.net/~aims Post to : [email protected] Unsubscribe : https://launchpad.net/~aims More help : https://help.launchpad.net/ListHelp
