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https://issues.apache.org/jira/browse/COUCHDB-597?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12790894#action_12790894
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Paul Joseph Davis commented on COUCHDB-597:
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I'm pretty sure that this is a message leaking from couch_ref_counter. The
#Ref<...> variable is the same type of response from a call to
erlang:monitor(process, Pid). And couch_ref_counter.erl stores refs like this
with a tuple of {Ref, Count} which fits the message that's killing
couch_task_status. That said, I don't have any idea how such a message is
leaking out of the ref counter. My only guess is that there's a piece of code
somewhere that's trying to catch exceptions and strips a badmatch or other
error making this look like a message that was sent instead of an error
propagation.
> Replication tasks crash.
> ------------------------
>
> Key: COUCHDB-597
> URL: https://issues.apache.org/jira/browse/COUCHDB-597
> Project: CouchDB
> Issue Type: Bug
> Components: Database Core
> Affects Versions: 0.11
> Reporter: Robert Newson
>
> If I kick off 10 replication tasks in quick succession, occasionally one or
> two of the replication tasks will die and not be resumed. It seems that the
> stat tracking is a little buggy, and under stress can eventually cause a
> permanent failure of the supervised replication task;
> [Fri, 11 Dec 2009 19:00:08 GMT] [error] [<0.80.0>] {error_report,<0.30.0>,
> {<0.80.0>,supervisor_report,
> [{supervisor,{local,couch_rep_sup}},
> {errorContext,shutdown_error},
> {reason,killed},
> {offender,
> [{pid,<0.6700.11>},
> {name,"fcbb13200a1618cf983b347f4d2c9835+create_target"},
> {mfa,
> {gen_server,start_link,
> [couch_rep,
> ["fcbb13200a1618cf983b347f4d2c9835",
> {[{<<"create_target">>,true},
> {<<"source">>,<<"http://node:5984/perf-p2";>>},
> {<<"target">>,<<"perf-p2">>}]},
> {user_ctx,null,[<<"_admin">>]}],
> []]}},
> {restart_type,temporary},
> {shutdown,1},
> {child_type,worker}]}]}}
> [Fri, 11 Dec 2009 19:00:08 GMT] [error] [emulator] Error in process
> <0.6705.11> with exit value:
> {badarg,[{ets,insert,[stats_hit_table,{{couchdb,open_os_files},-1}]},{couch_stats_collector,decrement,1}]}
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