nickva opened a new issue, #4809:
URL: https://github.com/apache/couchdb/issues/4809
This failure was noticed on MacOS CI worker:
```
couch_index_crash_tests:76: index_crash_test_
(t_index_process_dies)...*failed*
in function gen_server:call/3 (gen_server.erl, line 247)
in call from couch_util:with_db/2 (src/couch_util.erl, line 575)
in call from couch_index_crash_tests:t_index_process_dies/1
(test/eunit/couch_index_crash_tests.erl, line 169)
in call from eunit_test:run_testfun/1 (eunit_test.erl, line 71)
in call from eunit_proc:run_test/1 (eunit_proc.erl, line 531)
in call from eunit_proc:with_timeout/3 (eunit_proc.erl, line 356)
in call from eunit_proc:handle_test/2 (eunit_proc.erl, line 514)
in call from couch_index_server:get_index/3
called as
get_index(test_index,{db,1,<<"shards/00000000-ffffffff/eunit-test-db-df9ba"...>>,
"/Users/nvatama/asf/tmp/data/shards/00000000-ffffffff/eunit-test-db-df9ba5011aeb1414c66776d780ab2d3b.1697513861.couch",
{couch_bt_engine,{st,"/Users/nvatama/asf/tmp/data/shards/00000000-ffffffff/eunit-test-db-df9ba5011aeb1414c66776d780ab2d3b.1697513861.couch",
<0.914.0>,#Ref<0.3262295735.3275227137.251265>,
undefined,
{db_header,...},
false,...}},
<0.913.0>,nil,1,<<"1697513861067778">>,
{user_ctx,null,[],undefined},
[],[],nil,nil,...},{doc,<<"idx_name">>,
{1,[<<23,144,119,134,205,40,77,101,...>>]},
{[{<<"value">>,1}]},
[],false,[]})
**exit:{boom,
{gen_server,call,
[index_server_9,
{get_index,
{test_index,
{<<"shards/00000000-ffffffff/eun"...>>,
{doc,<<"idx_name">>,{1,[<<...>>]},{[{...}]},[],false,...}},
<<"shards/00000000-ffffffff/eun"...>>,
<<210,59,167,223,130,127,...>>}},
infinity]}}
output:<<"">>
```
The test code in question is:
```erlang
exit(IdxPid, boom),
meck:wait(couch_index_server, handle_info, [{'EXIT', IdxPid, boom}, '_'],
1000),
{ok, IdxPid2} = get_index(DbShard, DDoc),
```
We kill an index process expecting a new one to start. However when calling
`get_index/3` `index_server_9` itself crashes. That seem to point to a race
condition in the index server logic.
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