问题
我想使用共享订阅，但订阅共享主题时收不到任何消息。
C:\Program Files\mosquitto>mosquitto_sub -h localhost -p 1883 -q 2 -t \$share/group/audit/#
但是，当订阅没有 share 关键字的主题时，一切正常
C:\Program Files\mosquitto>mosquitto_sub -h localhost -p 1883 -q 2 -t /audit/#
{"objectUuid":"3749003c-5302-4b1f-a111-4a42c5f08f14","trackingId":"155049F9-D8B7-467A-B775-5E9D82E94B26","system":"core","market":"Germany","user":"3749003c-5302-4b1f-a111-4a42c5f08f13","type":"Customer","action":"UNLOCKED","severity":"INFO","content":"testN480","createdAt":null}
我试过的
我已经尝试过各种版本的主题名称（带有斜线，没有转义 share 关键字，没有通配符......）
在查看代理实例上的主题时（mqtt 代理是集群的），订阅似乎是成功的：
vernemq@mqtt-broker-1:~$ vmq-admin session show --topic
+----------------------------+
| topic |
+----------------------------+
|$share/audit-service/audit/#|
| /audit/# |
|$share/audit-service/audit/#|
| $share/group/audit/# |
+----------------------------+
配置看起来像这样
[{eleveldb,
[{compression,true},
{fadvise_willneed,false},
{eleveldb_threads,71},
{verify_compaction,true},
{verify_checksums,true},
{block_size_steps,16},
{block_restart_interval,16},
{sst_block_size,4096},
{block_cache_threshold,33554432},
{use_bloomfilter,true},
{write_buffer_size_max,62914560},
{write_buffer_size_min,31457280},
{limited_developer_mem,false},
{sync,false},
{total_leveldb_mem_percent,70},
{data_root,"./data/leveldb"},
{data,[{dir,"./data"}]},
{delete_threshold,1000},
{tiered_slow_level,0}]},
{riak_sysmon,
[{busy_dist_port,true},
{busy_port,true},
{port_limit,2},
{process_limit,30},
{gc_ms_limit,0},
{schedule_ms_limit,0},
{heap_word_limit,20055500}]},
{kernel,[{inet_dist_listen_max,9109},{inet_dist_listen_min,9100}]},
{lager,
[{error_logger_hwm,100},
{error_logger_redirect,true},
{crash_log_date,"$D0"},
{crash_log_size,10485760},
{crash_log_msg_size,65536},
{handlers,
[{lager_console_backend,debug},
{lager_file_backend,
[{file,"./log/error.log"},
{level,error},
{size,10485760},
{date,"$D0"},
{count,5}]}]},
{crash_log,"./log/crash.log"},
{crash_log_count,5}]},
{sasl,[{sasl_error_logger,false}]},
{vmq_swc,[{db_backend,leveldb},{data_dir,"./data/swc_meta"}]},
{vmq_bridge,
[{clique_lead_line," bridge Manage MQTT bridges\n"},
{registry_mfa,{vmq_reg,direct_plugin_exports,[vmq_bridge]}},
{config,{[],[]}}]},
{vmq_webhooks,
[{pool_timeout,60000},
{pool_max_connections,100},
{clique_lead_line," webhooks Manage webhooks\n"},
{user_webhooks,[]}]},
{vmq_diversity,
[{clique_lead_line," script Manage lua scripts\n"},
{db_config,
[{memcache,[{port,11211},{host,"localhost"}]},
{redis,
[{pool_size,5},
{database,0},
{password,[]},
{port,6379},
{host,"localhost"}]},
{mongodb,
[{w_mode,safe},
{r_mode,master},
{pool_size,5},
{port,27017},
{host,"localhost"}]},
{mysql,
[{password_hash_method,password},
{pool_size,5},
{database,"vernemq_db"},
{password,"password"},
{user,"root"},
{port,3306},
{host,"localhost"}]},
{postgres,
[{pool_size,5},
{database,"vernemq_db"},
{password,"password"},
{user,"root"},
{port,5432},
{host,"localhost"}]}]},
{auth_cache,
[{redis,[{file,"./share/lua/auth/redis.lua"},{enabled,false}]},
{mongodb,[{file,"./share/lua/auth/mongodb.lua"},{enabled,false}]},
{mysql,[{file,"./share/lua/auth/mysql.lua"},{enabled,false}]},
{postgres,
[{file,"./share/lua/auth/postgres.lua"},{enabled,false}]}]},
{script_dir,"./share/lua"},
{nr_lua_states,1},
{keep_state,false}]},
{vmq_passwd,[{interval,10},{file,"./etc/vmq.passwd"}]},
{vmq_acl,[{interval,10},{file,"./etc/vmq.acl"}]},
{vmq_plugin,
[{wait_for_proc,vmq_server_sup},
{default_schema_dir,["/vernemq/lib/vmq_server-1.7.0/priv"]}]},
{vmq_server,
[{metadata_impl,vmq_plumtree},
{receive_max_broker,65535},
{receive_max_client,65535},
{topic_alias_max_broker,0},
{topic_alias_max_client,0},
{suppress_lwt_on_session_takeover,false},
{shared_subscription_timeout_action,ignore},
{shared_subscription_policy,prefer_local},
{msg_store_opts,[{store_dir,"./data/msgstore"}]},
{graphite_include_labels,false},
{graphite_api_key,[]},
{graphite_prefix,[]},
{graphite_reconnect_timeout,15000},
{graphite_connect_timeout,5000},
{graphite_interval,20000},
{graphite_port,2003},
{graphite_host,"localhost"},
{graphite_enabled,false},
{systree_reg_view,vmq_reg_trie},
{systree_retain,false},
{systree_qos,0},
{systree_mountpoint,[]},
{systree_interval,20000},
{systree_enabled,true},
{crl_refresh_interval,60000},
{remote_enqueue_timeout,5000},
{outgoing_clustering_buffer_size,10000},
{upgrade_outgoing_qos,false},
{max_message_size,0},
{max_message_rate,0},
{max_offline_messages,1000},
{max_online_messages,1000},
{max_inflight_messages,20},
{max_client_id_size,100},
{retry_interval,20},
{default_reg_view,vmq_reg_trie},
{queue_sup_sup_children,50},
{max_msgs_per_drain_step,100},
{max_drain_time,500},
{allow_multiple_sessions,false},
{allow_unsubscribe_during_netsplit,false},
{allow_subscribe_during_netsplit,false},
{allow_publish_during_netsplit,false},
{allow_register_during_netsplit,false},
{allow_anonymous,true},
{queue_deliver_mode,fanout},
{queue_type,fifo},
{reg_views,[vmq_reg_trie]},
{persistent_client_expiration,0},
{max_last_will_delay,0},
{message_size_limit,0},
{http_modules,
[vmq_metrics_http,vmq_http_mgmt_api,vmq_status_http,
vmq_health_http]},
{listeners,
[{mqtt,
[{{{0,0,0,0},1883},
[{max_connections,10000},
{nr_of_acceptors,10},
{mountpoint,[]},
{proxy_protocol,false},
{allowed_protocol_versions,[3,4,131]}]}]},
{mqtts,[]},
{mqttws,
[{{{10,6,19,176},8080},
[{max_connections,10000},
{nr_of_acceptors,10},
{mountpoint,[]},
{proxy_protocol,false},
{allowed_protocol_versions,[3,4,131]}]}]},
{mqttwss,[]},
{vmq,
[{{{10,6,19,176},44053},
[{max_connections,10000},
{nr_of_acceptors,10},
{mountpoint,[]}]}]},
{vmqs,[]},
{http,
[{{{10,6,19,176},8888},
[{max_connections,10000},
{nr_of_acceptors,10},
{config_mod,vmq_http_config},
{config_fun,config},
{proxy_protocol,false}]},
{{{127,0,0,1},8888},
[{max_connections,10000},
{nr_of_acceptors,10},
{config_mod,vmq_http_config},
{config_fun,config},
{proxy_protocol,false}]}]},
{https,[]}]},
{tcp_listen_options,
[{nodelay,true},
{linger,{true,0}},
{send_timeout,30000},
{send_timeout_close,true}]},
{user_plugins,
[{"vmq_acl",#{name => vmq_acl,path => undefined}},
{"vmq_passwd",#{name => vmq_passwd,path => undefined}}]}]},
{setup,[{data_dir,"./data/"},{log_dir,"./log/"}]},
{plumtree,
[{drop_i_have_threshold,1000000},
{outstanding_limit,250000},
{plumtree_data_dir,"./data/meta"}]}]
有没有配置错误？我是否需要定义任何值才能使共享订阅起作用？我使用 verneMq 1.7.0。错误日志为空。如何调试消息未发送给订阅者的原因？