[Rspamd-Users] 'spamc learn_spam' fails with 'HTTP error: 500, Unknown statistics error'

[Yasuhiro KIMURA]

From: Tim Harman via Users <users at lists.rspamd.com>
Subject: Re: [Rspamd-Users] 'spamc learn_spam' fails with 'HTTP error: 500, Unknown statistics error'
Date: Thu, 29 Nov 2018 21:08:39 +1300

> I would suggest looking at your /var/log/rspamd/rspamd.log (or wherever
> your log file is) and seeing if it can provide you with anymore
> information.

Thank you for suggestion. I got following message when I executed
'rspmac lean_spam'.

yasu at eastasia[2170]% tail -0f /var/log/rspamd/rspamd.log                                                                   ~
2018-12-01 19:54:07 #752(controller) <731c60>; csession; rspamd_controller_check_password: allow unauthorized connection from a trusted IP 127.0.0.1
2018-12-01 19:54:07 #752(controller) <731c60>; csession; rspamd_message_parse: loaded message; id: <20181127235149.DF964AE5EA9 at mail.prospector.kz>; queue-id: <undef>; size: 4210; checksum: <21b55fd227635acf41c417c420722c42>                          
2018-12-01 19:54:07 #752(controller) <731c60>; csession; rspamd_mime_text_part_utf8_convert: converted from ISO_8859-1:1987 to UTF-8 inlen: 811, outlen: 811
2018-12-01 19:54:07 #752(controller) <731c60>; csession; rspamd_mime_part_detect_language: detected part language: en       
2018-12-01 19:54:07 #752(controller) <731c60>; csession; rspamd_stat_classifiers_process: skip statistics as SPAM class is missing
2018-12-01 19:54:07 #752(controller) <731c60>; csession; rspamd_task_process: learn error: Unknown statistics error         
2018-12-01 19:54:07 #752(controller) <731c60>; csession; rspamd_controller_learn_fin_task: cannot learn <20181127235149.DF964AE5EA9 at mail.prospector.kz>: Unknown statistics error
^C
yasu at eastasia[2170]%

Does anyone know what is wrong?

---
Yasuhiro KIMURA