System.Xml.XmlException: Document element did not appear. Line 1, position 1.

Hi,

Found my workstation hung this morning.  When I finally got the mess
cleaned up, I had a completely full ~ and two huge beagle log files:

$ ls -l 2008-01-11-10-37-00-Beagle*
-rw-r--r-- 1 brian brian 1740251136 2008-01-12 03:29 2008-01-11-10-37-00-Beagle
-rw-r--r-- 1 brian brian       3262 2008-01-11 10:54 2008-01-11-10-37-00-BeagleConsole
-rw-r--r-- 1 brian brian 1740238848 2008-01-12 03:29 2008-01-11-10-37-00-BeagleExceptions

Yes, that's 1.7_G_B each.  They are both full of the same exception over
and over and over again:

20080111 10:38:30.0808 27307 Beagle  WARN EX: Caught exception in DoTaskReal
20080111 10:38:30.0808 27307 Beagle  WARN EX:         Tag: Crawling Nautilus Metadata
20080111 10:38:30.0808 27307 Beagle  WARN EX:     Creator: 
20080111 10:38:30.0808 27307 Beagle  WARN EX: Description: 
20080111 10:38:30.0808 27307 Beagle  WARN EX:    Priority: Delayed (0)
20080111 10:38:30.0808 27307 Beagle  WARN EX: System.Xml.XmlException: Document element did not appear.  Line 1, position 1.
20080111 10:38:30.0808 27307 Beagle  WARN EX:   at Mono.Xml2.XmlTextReader.Read () [0x00000] 
20080111 10:38:30.0808 27307 Beagle  WARN EX:   at System.Xml.XmlTextReader.Read () [0x00000] 
20080111 10:38:30.0808 27307 Beagle  WARN EX:   at Mono.Xml.EntityResolvingXmlReader.Read () [0x00000] 
20080111 10:38:30.0808 27307 Beagle  WARN EX:   at Mono.Xml.DTDValidatingReader.ReadContent () [0x00000] 
20080111 10:38:30.0808 27307 Beagle  WARN EX:   at Mono.Xml.DTDValidatingReader.Read () [0x00000] 
20080111 10:38:30.0808 27307 Beagle  WARN EX:   at Mono.Xml.Schema.XsdValidatingReader.Read () [0x00000] 
20080111 10:38:30.0808 27307 Beagle  WARN EX:   at System.Xml.XmlValidatingReader.Read () [0x00000] 
20080111 10:38:30.0808 27307 Beagle  WARN EX:   at System.Xml.XmlDocument.ReadNodeCore (System.Xml.XmlReader reader) [0x00000] 
20080111 10:38:30.0808 27307 Beagle  WARN EX:   at System.Xml.XmlDocument.ReadNode (System.Xml.XmlReader reader) [0x00000] 
20080111 10:38:30.0808 27307 Beagle  WARN EX:   at System.Xml.XmlDocument.Load (System.Xml.XmlReader xmlReader) [0x00000] 
20080111 10:38:30.0808 27307 Beagle  WARN EX:   at System.Xml.XmlDocument.Load (System.IO.TextReader txtReader) [0x00000] 
20080111 10:38:30.0808 27307 Beagle  WARN EX:   at Beagle.Util.NautilusTools+<>c__CompilerGenerated2.MoveNext () [0x00000] 
20080111 10:38:30.0808 27307 Beagle  WARN EX:   at Beagle.Daemon.NautilusMetadataQueryable.NautilusMetadataQueryable.HasNextIndexable () [0x00000] 
20080111 10:38:30.0808 27307 Beagle  WARN EX:   at Beagle.Daemon.LuceneQueryable+AddGeneratorTask.DoTaskReal () [0x00000] 
20080111 10:38:30.0808 27307 Beagle  WARN EX:   at Beagle.Util.Scheduler+Task.DoTask () [0x00000] 

This error aside, I think it's some for some intelligence in the beagle
log handling.  Too many times beagle has filled my ~ with a single error
that just repeats over and over again.  That log would be no less useful
if it logged that error once and then periodic "last exception repeated
5000 times".  Or even a single "last message repeated" for each instance
rather than the whole exception and backtrace every single time.

So, now for the exception, any ideas what it's all about?

b.

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