[Tracker] tracker-extract not being restarted

[Ralph Böhme <rb netafp com>]

Hi all,

this is somehat a follow up to <https://mail.gnome.org/archives/tracker-list/2014-March/msg00052.html>.

  "Shouldn't we restart tracker-extract if it crashes?
   I remember one of the reasons moving the data extraction process into
   a separate tool was to be more resilient."

Looks like on a system tracker-extract hangs and/or crashes and Tracker never recovers. tracker-control -S 
keeps reporting tracker-extract as being disabled/not running:

# tracker-control -S
Store:
09 May 2014, 14:32:47:  ?     Store                 - Idle
  
Miners:
09 May 2014, 14:32:47:    1%  File System           - Crawling recursively
directory 'file:///foo/bar'
09 May 2014, 14:32:47:  ?     Extractor             - Not running or is a
disabled plugin
09 May 2014, 14:32:47:  ?     Applications          - Idle

This is with Tracker 1.0.1.

It's easily reproducible by sending tracker-extract a SIGKILL.

-Ralph

-- 
Ralph Böhme <rb netafp com>
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