Hello Dusan,
thank you for the log files above.
However, the latest Heap Dump file I have got from you is of 10.12.2012, 15:18. Do you have any log files matching that time stamp or do you have further heap dumps occuring at 17.12.2012?
Best regards,
Thorsten
PS:
I will be back here in the forum at 04.01.2013