Lots of log lines, after upgrading to openhab2.1

Hello,
Since my last update I see lots of log lines like those:
2017-07-05 21:31:00.406 [INFO ] [Manager$ExpressionThreadPoolExecutor] - Expression ‘0 31 21 5 7 ? 2017’ has no future executions anymore
2017-07-05 21:31:00.411 [INFO ] [Manager$ExpressionThreadPoolExecutor] - Expression ‘0 31 21 5 7 ? 2017’ has no future executions anymore
2017-07-05 21:31:00.416 [INFO ] [Manager$ExpressionThreadPoolExecutor] - Expression ‘0 31 21 5 7 ? 2017’ has no future executions anymore
2017-07-05 21:31:00.462 [INFO ] [Manager$ExpressionThreadPoolExecutor] - Expression ‘0 31 21 5 7 ? 2017’ has no future executions anymore
2017-07-05 21:31:00.474 [INFO ] [Manager$ExpressionThreadPoolExecutor] - Expression ‘0 31 21 5 7 ? 2017’ has no future executions anymore

I assumes it is because of timers… but can someone explain me why?
Thanks ahead.

That are lines from the astro binding.
In one of the next snapshots that message will go to a higher level, so you won’t see it as INFO anymore.

Thanks!