Multiple concurrent XtraBackup instances do not work correctly with the same --tmpdir, even when running against different server instances. Which is a known issue, but it seems like it has not been reported anywhere. Let's keep this report as a request to fix this.
Multiple concurrent XtraBackup instances do not work correctly with the same --tmpdir, even when running against different server instances. Which is a known issue, but it seems like it has not been reported anywhere. Let's keep this report as a request to fix this.
See also bug #1071938.