error: open db failed in create_partition()

[Former user]

Jun 19 16:51:15 akula clapf[19645]: 4000000055842c6d125638b40012f77b3e8c: sent: 221 clapf.chemaxon Goodbye#015 Jun 19 16:51:15 akula clapf[19645]: processed 1 messages Jun 19 16:51:15 akula clapf[19645]: child (pid: 19645) served enough: 1000 Jun 19 16:51:15 akula clapf[19645]: child decides to exit (pid: 19645) Jun 19 16:51:15 akula clapf[5624]: forked a child (pid: 5624) Jun 19 16:51:15 akula clapf[5624]: child (pid: 5624) started main() Jun 19 17:05:06 akula clapf[18967]: error: open db failed in create_partition() Jun 19 17:05:06 akula clapf[18967]: error: open db failed in drop_partition() [..]

After this point clapf doesn't serve anything with this error, however it's still listening.