[mythtvnz] Mythconverg_backup.pl stopped backing up properly

[Aaron Whitehouse]

On a related note, mythconverg_backup.pl seems to have stopped working 
properly some days ago.

I have a cron job to do a backup every day at around 4am.

.sql.gz files for each day are in the correct folder until 31 March 
2010, when they change to being .sql files that are only 803 bytes 
(instead of approx 9 MB) that say the following:
-- MySQL dump 10.13  Distrib 5.1.37, for debian-linux-gnu (x86_64)
--
-- Host: localhost    Database: mythconverg
-- ------------------------------------------------------
-- Server version	5.1.37-1ubuntu5.1

/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
/*!40101 SET NAMES utf8 */;
/*!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE */;
/*!40103 SET TIME_ZONE='+00:00' */;
/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, 
FOREIGN_KEY_CHECKS=0 */;
/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;

It looks to me as though the script is now crashing at this point.

Thankfully, I imaged the partition before I started, so I can restore 
that to take a new dump from the database (and then restore the Lucid 
partition).

Has anyone got any ideas why this may have happened? it is a pretty 
serious bug, as I didn't realise it wasn't backing up properly (it 
didn't even give an error when I did a manual mythconverg_backup from 
the command line immediately before upgrading) and I'd like to file a bug.

Once I get everything back to the old setup, I'll try running the script 
with the --verbose argument.

I'm wondering if there was some recording with a "?" or a funny 
character that stopped it, so other people may want to check their backups.

Thanks,

Aaron