Standard fuzzy check on rspamd.com doesn't work

[yennor]

I've got a very simple rspamd configuration. But as it seems the default fuzzy check on rspamd.com which is supposed to work, doesn't. It gets executed, but the symbols aren't added to the mail.
As it seems there is some problems with the symbols. But I've definitely didn't change any of those configs.
I'm using version 3.1-1~buster on debian buster from the rspamd.com repository.
Anybody got any idea why it isn't working?
The fuzzy config is just the standard:

*** Section fuzzy_check ***
retransmits = 1;
timeout = 2;
rule {
    rspamd.com {
        min_length = 64;
        max_score = 20;
        servers = "round-robin:fuzzy1.rspamd.com:11335,fuzzy2.rspamd.com:11335";
        mime_types [
            "*",
        ]
        symbol = "FUZZY_UNKNOWN";
        fuzzy_map {
            FUZZY_PROB {
                flag = 2;
                max_score = 10;
            }
            FUZZY_WHITE {
                flag = 3;
                max_score = 2;
            }
            FUZZY_DENIED {
                flag = 1;
                max_score = 20;
            }
        }
        encryption_key = "icy63itbhhni8bq15ntp5n5symuixf73s1kpjh6skaq4e7nx5fiy";
        algorithm = "mumhash";
        read_only = true;
        skip_unknown = true;
        short_text_direct_hash = true;
    }
}
min_bytes = 1000;

*** End of section fuzzy_check ***

The debug output on starting the service and receiving a mail is following

2021-11-25 04:44:26 #21696(main) rspamd_logger_configure_modules: enable debugging for module fuzzy_backend (39)
2021-11-25 04:44:26 #21696(main) rspamd_logger_configure_modules: enable debugging for module fuzzy_check (40)
2021-11-25 04:44:26 #21696(main) <>; lua; lua_util.lua:1075: enable debug for Lua module fuzzy_backend
2021-11-25 04:44:26 #21696(main) <>; lua; lua_util.lua:1075: enable debug for Lua module fuzzy_check
2021-11-25 04:44:26 #21696(main) <8fxhpr>; config; rspamd_config_new_symbol: registered symbol FUZZY_WHITE with weight -2.10 in and group fuzzy
2021-11-25 04:44:26 #21696(main) <8fxhpr>; config; rspamd_config_new_symbol: registered symbol FUZZY_DENIED with weight 12.00 in and group fuzzy
2021-11-25 04:44:26 #21696(main) <8fxhpr>; config; rspamd_config_new_symbol: registered symbol FUZZY_PROB with weight 5.00 in and group fuzzy
2021-11-25 04:44:26 #21696(main) <8fxhpr>; config; rspamd_config_new_symbol: registered symbol FUZZY_UNKNOWN with weight 5.00 in and group fuzzy
2021-11-25 04:44:26 #21696(main) <8a6d19>; expression; rspamd_parse_expression: start to parse expression '(~g-:policies) & (-g+:fuzzy | -g+:bayes | -g+:surbl | -g+:rbl)'
2021-11-25 04:44:26 #21696(main) <8a6d19>; expression; rspamd_parse_expression: found atom: -g+:fuzzy; pushed onto operand stack (2 size)
2021-11-25 04:44:26 #21696(main) <8fxhpr>; symcache; rspamd_symcache_add_symbol: used items: 315, added symbol: FUZZY_CALLBACK, 222; symbol type: normal
2021-11-25 04:44:26 #21696(main) <8fxhpr>; config; rspamd_config_new_symbol: registered symbol FUZZY_CALLBACK with weight 0.00 in and group fuzzy
2021-11-25 04:44:26 #21696(main) <87px18>; upstream; rspamd_upstreams_add_upstream: added upstream fuzzy1.rspamd.com:11335 (DNS name)
2021-11-25 04:44:26 #21696(main) <5bpgs7>; upstream; rspamd_upstreams_add_upstream: added upstream fuzzy2.rspamd.com:11335 (DNS name)
2021-11-25 04:44:26 #21696(main) <8fxhpr>; symcache; rspamd_symcache_add_symbol: used items: 316, added symbol: FUZZY_DENIED, 92; symbol type: virtual
2021-11-25 04:44:26 #21696(main) <8fxhpr>; symcache; rspamd_symcache_add_symbol: used items: 317, added symbol: FUZZY_WHITE, 93; symbol type: virtual
2021-11-25 04:44:26 #21696(main) <8fxhpr>; symcache; rspamd_symcache_add_symbol: used items: 318, added symbol: FUZZY_PROB, 94; symbol type: virtual
2021-11-25 04:44:26 #21696(main) <8fxhpr>; symcache; rspamd_symcache_add_symbol: used items: 319, added symbol: FUZZY_UNKNOWN, 95; symbol type: virtual
2021-11-25 04:44:26 #21696(main) <8fxhpr>; cfg; fuzzy_parse_rule: added fuzzy rule FUZZY_UNKNOWN, key: ef43ae80cc8d, shingles_key: ef43ae80cc8d, algorithm: mum
2021-11-25 04:44:26 #21696(main) <8fxhpr>; cfg; fuzzy_check_module_config: init internal fuzzy_check module, 1 rules loaded
2021-11-25 04:44:26 #21696(main) <8fxhpr>; cfg; rspamd_config_is_module_enabled: lua module fuzzy_collect is enabled but has not been configured
2021-11-25 04:44:26 #21696(main) <8fxhpr>; cfg; rspamd_config_is_module_enabled: fuzzy_collect disabling unconfigured lua module
2021-11-25 04:44:26 #21696(main) rspamd_logger_configure_modules: enable debugging for module fuzzy_backend (39)
2021-11-25 04:44:26 #21696(main) rspamd_logger_configure_modules: enable debugging for module fuzzy_check (40)
2021-11-25 04:44:28 #21696(main) <8fxhpr>; symcache; rspamd_symcache_post_init: delayed between FUZZY_CALLBACK(222:222) -> MIME_TYPES_CALLBACK
2021-11-25 04:44:28 #21696(main) <8fxhpr>; symcache; rspamd_symcache_process_dep: process real dependency FUZZY_CALLBACK on MIME_TYPES_CALLBACK
2021-11-25 04:44:28 #21696(main) <8fxhpr>; symcache; rspamd_symcache_propagate_dep: check id propagation for dependency FUZZY_CALLBACK from MIME_TYPES_CALLBACK
2021-11-25 04:44:28 #21696(main) <8fxhpr>; symcache; rspamd_symcache_tsort_visit: visiting node: FUZZY_CALLBACK (1)
2021-11-25 04:44:28 #21696(main) <1u5hdp>; map; rspamd_parse_kv_list: insert key only pair: fuzzy.to -> ; line: 280
2021-11-25 04:44:28 #21696(main) <o33omj>; map; rspamd_parse_kv_list: insert key value pair: application/vnd.fuzzysheet -> 0
2021-11-25 04:44:28 #21696(main) <1a2888>; main; spawn_workers: worker of type fuzzy(localhost:11335) is disabled in the config, skip spawning
2021-11-25 04:44:45 #21697(rspamd_proxy) <873cc1>; symcache; rspamd_symcache_finalize_item: check item 222(FUZZY_CALLBACK) rdep of MIME_TYPES_CALLBACK
2021-11-25 04:44:45 #21697(rspamd_proxy) <873cc1>; symcache; rspamd_symcache_check_deps: dependency 239(MIME_TYPES_CALLBACK) for symbol 222(FUZZY_CALLBACK) is already checked
2021-11-25 04:44:45 #21697(rspamd_proxy) <873cc1>; symcache; rspamd_symcache_check_symbol: execute FUZZY_CALLBACK, 222; symbol type = normal
2021-11-25 04:44:45 #21697(rspamd_proxy) <873cc1>; symcache; rspamd_symcache_item_async_inc_full: increase async events counter for FUZZY_CALLBACK(222) = 0 + 1; subsystem fuzzy check (./src/plugins/fuzzy_check.c:3248)
2021-11-25 04:44:45 #21697(rspamd_proxy) <873cc1>; lua_fuzzy; lua_fuzzy.lua:155: check text part 0
2021-11-25 04:44:45 #21697(rspamd_proxy) <873cc1>; lua_fuzzy; lua_fuzzy.lua:169: allow shingles in text 0, 102 words
2021-11-25 04:44:45 #21697(rspamd_proxy) <873cc1>; task; fuzzy_cmd_from_text_part: loading shingles of type mum with key ef43ae80cc8dc34c6f1bd6181bae8774
2021-11-25 04:44:45 #21697(rspamd_proxy) <873cc1>; events; rspamd_session_add_event_full: added event: 00007F0C06AEC8F0, pending 3 (+1) events, subsystem: fuzzy check (./src/plugins/fuzzy_check.c:3207)
2021-11-25 04:44:45 #21697(rspamd_proxy) <873cc1>; symcache; rspamd_symcache_item_async_inc_full: increase async events counter for FUZZY_CALLBACK(222) = 1 + 1; subsystem fuzzy check (./src/plugins/fuzzy_check.c:3211)
2021-11-25 04:44:45 #21697(rspamd_proxy) <873cc1>; symcache; rspamd_symcache_item_async_dec_full: decrease async events counter for FUZZY_CALLBACK(222) = 2 - 1; subsystem fuzzy check (./src/plugins/fuzzy_check.c:3258)
2021-11-25 04:44:45 #21697(rspamd_proxy) <873cc1>; chartable; rspamd_chartable_process_word_utf: word fuzzy_unknown, badness: 0.00
2021-11-25 04:44:45 #21697(rspamd_proxy) <873cc1>; symcache; rspamd_symcache_item_async_dec_full: decrease async events counter for FUZZY_CALLBACK(222) = 1 - 1; subsystem fuzzy check (./src/plugins/fuzzy_check.c:2538)
2021-11-25 04:44:45 #21697(rspamd_proxy) <873cc1>; symcache; rspamd_symcache_finalize_item: process finalize for item FUZZY_CALLBACK(222)
2021-11-25 04:44:45 #21697(rspamd_proxy) <873cc1>; events; rspamd_session_remove_event_full: removed event: 00007F0C06AEC8F0, pending 5 (-1) events, subsystem: fuzzy check (./src/plugins/fuzzy_check.c:2541), added at ./src/plugins/fuzzy_check.c:3207
2021-11-25 04:44:46 #21697(rspamd_proxy) <873cc1>; composites; process_single_symbol: not found symbol FUZZY_DENIED in composite BAD_REP_POLICIES
2021-11-25 04:44:46 #21697(rspamd_proxy) <873cc1>; composites; process_single_symbol: not found symbol FUZZY_UNKNOWN in composite BAD_REP_POLICIES
2021-11-25 04:44:46 #21697(rspamd_proxy) <873cc1>; composites; process_single_symbol: not found symbol FUZZY_PROB in composite BAD_REP_POLICIES
2021-11-25 04:44:46 #21697(rspamd_proxy) <873cc1>; composites; rspamd_composite_expr_process: (NULL): result for atom g+:fuzzy in composite BAD_REP_POLICIES is 0.0000

[Flow86]

Same issue here, were you able to resolve this?

[yennor]

top be honest. I don't remember. I thing at some point i've just given up.
Unfortunately the documentation for some of the rspamd features is quite unclear :-(