Looking at log/searchd.log I'm noticing the warning below.
I made sure that db/sphinx/production is writable by the user running
searchd and the Web user.
Delta indexing seems to be working as expected.
Any thought on what might be causing it?
[Thu Oct 4 07:27:34.115 2012] [ 2209] caught SIGHUP (seamless=1, in
[Thu Oct 4 07:27:34.118 2012] [ 2209] WARNING: rotating index
failed: No such file or directory
[Thu Oct 4 07:27:34.118 2012] [ 2209] rotating index 'post_delta': success
[Thu Oct 4 07:27:34.118 2012] [ 2209] rotating finished