Then at least i am not alone.
But anything must have changed again... now i get constant output into my logfile:
2018-01-17T09:48:16.833780,solve,=,0,1c3bbd5c20a7c19d65088877a814cdf9d5107c96293f5b840389c90000000000
2018-01-17T09:48:20.372013,solve,=,0,c7ff512c368a5e5cc9074f41bba82a8cbdda3b6b16a953dcec27160000000000
2018-01-17T09:48:29.984226,solve,=,0,efac8bb9e695ea58b3e147aaf1a40dfbf39b6ae685db6837d608110200000000
2018-01-17T09:48:39.473773,solve,=,0,0da20844bd71b4b7b40a824434afc017d0216f01101918ee5a4f710100000000
2018-01-17T09:48:48.302358,solve,=,0,b81e5ec36fb684ecc8667748477af01d7dc3ddbf1e82de7c7614d80000000000
2018-01-17T09:48:57.405491,solve,=,0,e03ba51a21407d8cb2481b63a75a989e8157a5eb1c493e578edc130700000000
2018-01-17T09:49:07.811988,solve,=,0,aef5efa6927f258ceb4b8cd96f152627288cac6f31c6614a7fa21a0300000000
2018-01-17T09:49:10.203183,solve,=,0,b81ea62197b151004a17a86de7a823c76c2619da974245b32c11320200000000
2018-01-17T09:49:11.433996,solve,=,0,fbfaacd89cadc66e5812b62873e66520127c1bce96575940b20b840100000000
2018-01-17T09:49:12.659532,solve,=,0,395c318f43cfe5ddbf006f857e732a2082b06d1eb4d6c8b97252440300000000
2018-01-17T09:49:13.891554,solve,=,0,f7f07c7518dd2491e7d315229bbc48bd91e7ca39834ba4c86ea3600700000000
2018-01-17T09:49:15.024088,solve,=,0,fb01681f1a8cb1e35d59301b749d0eeb3c7f673d5df27e14bfdcd30100000000
2018-01-17T09:49:21.452645,solve,=,0,7e21814bd25fa4a5762d310ba10beb149465115d641b0d2f9a27860500000000
2018-01-17T09:49:30.904590,solve,=,0,0ce49924d878ad6bbab8fc8a13551ea9478228f4df42853fbc2b2b0400000000
2018-01-17T09:49:36.527601,solve,=,0,9d40954184fc919c90b2093730e9a7d1310ffcbed911039c9338cc0000000000
2018-01-17T09:49:39.678575,solve,=,0,4134073e9a214621d19b9f6229d656055de7d2ab9c688fbbc331220100000000
2018-01-17T09:49:49.482030,solve,=,0,d08e5ea22b39e707c478a6d3ad7064227001a1a7763463a998eb8f0200000000
2018-01-17T09:49:50.303801,solve,=,0,5871736c60d1a6b5f05117146d154c479935eedc5ca09cd3b9a2370000000000
But the exception is still occurring