I've the same problem.
100% CPU usage only at night.
2013-07-02 17:38:06 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
2013-07-02 17:38:41 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
2013-07-02 17:38:45 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
2013-07-02 17:39:30 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
2013-07-02 17:39:34 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
2013-07-02 17:39:55 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
and so on...
Something's taking too long! 'root.levels.paradise.tick.entities.regular.tick.ai.newAi.goalSelector.goalTick.pathfind' took aprox 261.523724 ms
Something's taking too long! 'root.levels.paradise.tick.entities.regular.tick.ai.newAi.goalSelector.goalTick' took aprox 262.027559 ms
Something's taking too long! 'root.levels.paradise.tick.entities.regular.tick.ai.newAi.goalSelector' took aprox 262.307236 ms
Something's taking too long! 'root.levels.paradise.tick.entities.regular.tick.ai.newAi' took aprox 262.701753 ms
Something's taking too long! 'root.levels.paradise.tick.entities.regular.tick.ai' took aprox 262.92655 ms
Something's taking too long! 'root.levels.paradise.tick.entities.regular.tick' took aprox 263.271346 ms
Something's taking too long! 'root.levels.paradise.tick.entities.regular' took aprox 467.872884 ms
Something's taking too long! 'root.levels.paradise.tick.entities' took aprox 468.349919 ms
Something's taking too long! 'root.levels.paradise.tick' took aprox 473.432748 ms
Something's taking too long! 'root.levels.paradise' took aprox 473.944583 ms
Something's taking too long! 'root.levels' took aprox 474.510017 ms
Something's taking too long! 'root' took aprox 476.359478 ms
I've the same problem.
100% CPU usage only at night.
2013-07-02 17:38:06 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
2013-07-02 17:38:41 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
2013-07-02 17:38:45 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
2013-07-02 17:39:30 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
2013-07-02 17:39:34 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
2013-07-02 17:39:55 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
and so on...
Maybe this can help:
Something's taking too long! 'root.levels.paradise.tick.entities.regular.tick.ai.newAi.goalSelector.goalTick.pathfind' took aprox 261.523724 ms
Something's taking too long! 'root.levels.paradise.tick.entities.regular.tick.ai.newAi.goalSelector.goalTick' took aprox 262.027559 ms
Something's taking too long! 'root.levels.paradise.tick.entities.regular.tick.ai.newAi.goalSelector' took aprox 262.307236 ms
Something's taking too long! 'root.levels.paradise.tick.entities.regular.tick.ai.newAi' took aprox 262.701753 ms
Something's taking too long! 'root.levels.paradise.tick.entities.regular.tick.ai' took aprox 262.92655 ms
Something's taking too long! 'root.levels.paradise.tick.entities.regular.tick' took aprox 263.271346 ms
Something's taking too long! 'root.levels.paradise.tick.entities.regular' took aprox 467.872884 ms
Something's taking too long! 'root.levels.paradise.tick.entities' took aprox 468.349919 ms
Something's taking too long! 'root.levels.paradise.tick' took aprox 473.432748 ms
Something's taking too long! 'root.levels.paradise' took aprox 473.944583 ms
Something's taking too long! 'root.levels' took aprox 474.510017 ms
Something's taking too long! 'root' took aprox 476.359478 ms
Only during nighttime.
Tested the new snapshot.
Nothing has changed.
If they can't reach you: 100% cpu usage and lag