I get the same problem between to boxes running 14.04.2. As explained in the Debian bug, you can remove the "-z" flag and add the "-C" flag to ssh in order to move compression from rsync to ssh.
I get the same problem between to boxes running 14.04.2. As explained in the Debian bug, you can remove the "-z" flag and add the "-C" flag to ssh in order to move compression from rsync to ssh.