oldrich-svec commented on issue #3571:
URL: https://github.com/apache/couchdb/issues/3571#issuecomment-845800181
We have a similar issue (Ubuntu Server 20.04, Docker version of CouchDB
3.1.1).
We have a 30GB database which is being replicated from an another machine.
Looking at the files I can see that the database files take someting like 100GB
+ another ca. 30GB for the compaction files.
The compaction starts but always dies before it finishes. So the database
gets never compacted and the compaction files are hanging there forever.
Some logs:
```
couchdb-backup-service-01 | [info] 2021-05-21T08:27:57.466850Z nonode@nohost
<0.222.0> -------- db shards/80000000-ffffffff/yoda_filesystem.1614838752 died
with reason
{{badarg,[{erlang,monitor,[process,{main,'[email protected]'}],[]},{ioq,submit_request,2,[{file,"src/ioq.erl"},{line,187}]},{ioq,maybe_submit_request,1,[{file,"src/ioq.erl"},{line,150}]},{ioq,handle_info,2,[{file,"src/ioq.erl"},{line,123}]},{gen_server,try_dispatch,4,[{file,"gen_server.erl"},{line,616}]},{gen_server,handle_msg,6,[{file,"gen_server.erl"},{line,686}]},{proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,247}]}]},{gen_server,call,[ioq,{request,<0.24352.1>,{append_bin,[<<0,0,32,0>>,[<<6,66,160,149,155,150,189,119,66,50,121,52,14,190,9,143...}}
couchdb-backup-service-01 | [warning] 2021-05-21T08:27:57.467050Z
nonode@nohost <0.428.0> -------- exit for compaction of
["shards/00000000-7fffffff/yoda_filesystem.1614838752"]:
{{badarg,[{erlang,monitor,[process,{main,'[email protected]'}],[]},{ioq,submit_request,2,[{file,"src/ioq.erl"},{line,187}]},{ioq,maybe_submit_request,1,[{file,"src/ioq.erl"},{line,150}]},{ioq,handle_info,2,[{file,"src/ioq.erl"},{line,123}]},{gen_server,try_dispatch,4,[{file,"gen_server.erl"},{line,616}]},{gen_server,handle_msg,6,[{file,"gen_server.erl"},{line,686}]},{proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,247}]}]},{gen_server,call,[ioq,{request,<0.22588.1>,{pread_iolist,40340132370},compaction,<0.22589.1>,undefined},infinity]}}
couchdb-backup-service-01 | [info] 2021-05-21T08:27:57.467190Z nonode@nohost
<0.222.0> -------- db shards/00000000-7fffffff/yoda_filesystem.1614838752 died
with reason
{{badarg,[{erlang,monitor,[process,{main,'[email protected]'}],[]},{ioq,submit_request,2,[{file,"src/ioq.erl"},{line,187}]},{ioq,maybe_submit_request,1,[{file,"src/ioq.erl"},{line,150}]},{ioq,handle_info,2,[{file,"src/ioq.erl"},{line,123}]},{gen_server,try_dispatch,4,[{file,"gen_server.erl"},{line,616}]},{gen_server,handle_msg,6,[{file,"gen_server.erl"},{line,686}]},{proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,247}]}]},{gen_server,call,[ioq,{request,<0.22588.1>,{pread_iolist,40340132370},compaction,<0.22589.1>,undefined},infinity]}}
couchdb-backup-service-01 | [info] 2021-05-21T08:27:57.468479Z nonode@nohost
<0.28448.1> -------- Starting compaction for db
"shards/80000000-ffffffff/yoda_filesystem.1614838752" at 125776
couchdb-backup-service-01 | [notice] 2021-05-21T08:27:57.468708Z
nonode@nohost <0.428.0> -------- ratio_dbs: Started compaction for
shards/80000000-ffffffff/yoda_filesystem.1614838752
couchdb-backup-service-01 | [error] 2021-05-21T08:27:57.469504Z
nonode@nohost <0.22508.1> -------- gen_server ioq terminated with reason: bad
argument in call to erlang:monitor(process, {main,'[email protected]'}) at
ioq:submit_request/2(line:187) <= ioq:maybe_submit_request/1(line:150) <=
ioq:handle_info/2(line:123) <= gen_server:try_dispatch/4(line:616) <=
gen_server:handle_msg/6(line:686) <= proc_lib:init_p_do_apply/3(line:247)
couchdb-backup-service-01 | last msg: timeout
couchdb-backup-service-01 | state:
{state,10,0.01,{[{request,{main,'[email protected]'},{open,<0.28430.1>,<<"shards/80000000-ffffffff/yodadev_features.1614849634/de6fcb4cc39fbd3e0c1d621d441e9057">>,<<"standard">>},other,{<0.28430.1>,#Ref<0.2791382983.2
```
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