Thread job queue full
-3088 (aka "Max log queue len exceeded") indicates that the system can't keep up with the number of log messages being generated. As messages are logged in the Zentitle library they are fed into a queue then written out to disk.
Solution
Either decrease the loglevel so as to generate fewer messages or to increase the queue length of the logging system, or both.
Increase the library's logging queue length with the <LogQLen> tag. Depending on the system, one can run with the log queue length set to 2000 or 3000 without noticeable ill effect.