janl commented on issue #745: Replication with attachments never completes,
{mp_parser_died,noproc} error
URL: https://github.com/apache/couchdb/issues/745#issuecomment-361960288
Moar data from affected nodes. I?ve listed process by `current_function` and
sorted by occurrence
<details>
<summary>current function count/group script (click to reveal)</summary>
```erlang
io:format("~p", [
lists:keysort(2,
maps:to_list(lists:foldl(
fun(Elm, Acc) ->
case Elm of
{M, F, A} ->
N = maps:get({M, F, A}, Acc, 0),
maps:put({M, F, A}, N + 1, Acc);
Else ->
Acc
end
end,
#{},
lists:map(
fun(Pid) ->
case process_info(Pid) of
undefined -> [];
Info -> proplists:get_value(current_function, Info)
end
end,
processes()
)
))
)
])
```
</details>
### Output
Output from an affected node:
```erlang
[{{code_server,loop,1},1},
{{couch_replicator_scheduler,stats_updater_loop,1},1},
{{cpu_sup,measurement_server_loop,1},1},
{{cpu_sup,port_server_loop,2},1},
{{erl_eval,do_apply,6},1},
{{erl_prim_loader,loop,3},1},
{{erlang,hibernate,3},1},
{{gen,do_call,4},1},
{{global,loop_the_locker,1},1},
{{global,loop_the_registrar,0},1},
{{inet_gethost_native,main_loop,1},1},
{{init,loop,1},1},
{{mem3_shards,'-start_changes_listener/1-fun-0-',1},1},
{{memsup,port_idle,1},1},
{{net_kernel,ticker_loop,2},1},
{{shell,shell_rep,4},1},
{{standard_error,server_loop,1},1},
{{user,server_loop,2},1},
{{couch_changes,wait_updated,3},2},
{{prim_inet,recv0,3},2},
{{dist_util,con_loop,9},3},
{{gen_event,fetch_msg,5},6},
{{couch_os_process,'-init/1-fun-0-',2},23},
{{application_master,loop_it,4},25},
{{application_master,main_loop,2},25},
{{prim_inet,accept0,2},29},
{{couch_httpd_multipart,mp_parse_atts,2},31},
{{fabric_db_update_listener,cleanup_monitor,3},210},
{{fabric_db_update_listener,wait_db_updated,1},210},
{{rexi_monitor,wait_monitors,1},210},
{{rexi_utils,process_message,6},212},
{{couch_event_listener,loop,2},412},
{{couch_httpd_multipart,maybe_send_data,1},881},
{{couch_doc,'-doc_from_multi_part_stream/4-fun-1-',1},912},
{{gen_server,loop,6},2816}]
```
Unaffected node in the same cluster:
```erlang
[{{code_server,loop,1},1},
{{couch_ejson_compare,less,2},1},
{{couch_index_server,get_index,3},1},
{{couch_replicator_scheduler,stats_updater_loop,1},1},
{{cpu_sup,measurement_server_loop,1},1},
{{cpu_sup,port_server_loop,2},1},
{{erl_eval,do_apply,6},1},
{{erl_prim_loader,loop,3},1},
{{fabric_util,get_shard,4},1},
{{global,loop_the_locker,1},1},
{{global,loop_the_registrar,0},1},
{{inet_gethost_native,main_loop,1},1},
{{init,loop,1},1},
{{mem3_shards,'-start_changes_listener/1-fun-0-',1},1},
{{memsup,port_idle,1},1},
{{net_kernel,ticker_loop,2},1},
{{prim_inet,recv0,3},1},
{{shell,shell_rep,4},1},
{{standard_error,server_loop,1},1},
{{user,server_loop,2},1},
{{couch_changes,wait_updated,3},2},
{{dist_util,con_loop,9},3},
{{erlang,hibernate,3},3},
{{gen_event,fetch_msg,5},6},
{{rexi,wait_for_ack,2},8},
{{couch_os_process,'-init/1-fun-0-',2},16},
{{application_master,loop_it,4},25},
{{application_master,main_loop,2},25},
{{prim_inet,accept0,2},28},
{{couch_httpd_multipart,mp_parse_atts,2},37},
{{fabric_db_update_listener,wait_db_updated,1},112},
{{fabric_db_update_listener,cleanup_monitor,3},113},
{{rexi_monitor,wait_monitors,1},114},
{{rexi_utils,process_message,6},114},
{{couch_event_listener,loop,2},344},
{{couch_httpd_multipart,maybe_send_data,1},361},
{{couch_doc,'-doc_from_multi_part_stream/4-fun-1-',1},398},
{{gen_server,loop,6},10270}]
```
Output from a cluster that doesn?t have attachments:
```erlang
{{code_server,loop,1},1},
{{cpu_sup,measurement_server_loop,1},1},
{{cpu_sup,port_server_loop,2},1},
{{erl_eval,do_apply,6},1},
{{erl_prim_loader,loop,3},1},
{{erts_code_purger,loop,0},1},
{{fabric_db_update_listener,cleanup_monitor,3},1},
{{fabric_db_update_listener,wait_db_updated,1},1},
{{global,loop_the_locker,1},1},
{{global,loop_the_registrar,0},1},
{{init,loop,1},1},
{{net_kernel,ticker_loop,2},1},
{{rexi_monitor,wait_monitors,1},1},
{{rexi_utils,process_message,6},1},
{{shell,shell_rep,4},1},
{{standard_error,server_loop,1},1},
{{timer,sleep,1},1},
{{user,server_loop,2},1},
{{dist_util,con_loop,2},3},
{{gen_event,fetch_msg,5},6},
{{couch_changes,wait_updated,3},10},
{{couch_event_listener,loop,2},19},
{{application_master,loop_it,4},24},
{{application_master,main_loop,2},24},
{{couch_os_process,'-init/1-fun-0-',2},32},
{{prim_inet,accept0,2},33},
{{erlang,hibernate,3},75},
{{gen_server,loop,6},2521}]
```
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