xtrabackup: Make sure all files are closed before writing MANIFEST. #5177
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Signed-off-by: Anthony Yeh <enisoc@planetscale.com>
We've observed a backup that was missing files, yet had a MANIFEST. In the built-in backup engine, the contract was that the MANIFEST file must not be written unless all files were confirmed to have been uploaded successfully. In XtraBackup mode, we were not meeting this contract because an error that occurred while closing a file would not be noticed until after we had written the MANIFEST. Signed-off-by: Anthony Yeh <enisoc@planetscale.com>
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We've observed a backup that was missing files, yet had a MANIFEST.
In the built-in backup engine, the contract was that the MANIFEST file
must not be written unless all files were confirmed to have been
uploaded successfully. In XtraBackup mode, we were not meeting this
contract because an error that occurred while closing a file would not
be noticed until after we had written the MANIFEST.