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Posted to commits@couchdb.apache.org by va...@apache.org on 2020/06/10 15:46:42 UTC
[couchdb] branch backport-replicator-pending-jobs-fix-to-3.x
created (now 983ddc3)
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vatamane pushed a change to branch backport-replicator-pending-jobs-fix-to-3.x
in repository https://gitbox.apache.org/repos/asf/couchdb.git.
at 983ddc3 In replicator, when rescheduling, pick only pending jobs which are not running
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new 983ddc3 In replicator, when rescheduling, pick only pending jobs which are not running
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[couchdb] 01/01: In replicator, when rescheduling,
pick only pending jobs which are not running
Posted by va...@apache.org.
This is an automated email from the ASF dual-hosted git repository.
vatamane pushed a commit to branch backport-replicator-pending-jobs-fix-to-3.x
in repository https://gitbox.apache.org/repos/asf/couchdb.git
commit 983ddc3a523e9cee8de6bb4695a27daf52d11fca
Author: Nick Vatamaniuc <va...@apache.org>
AuthorDate: Tue Jun 9 17:53:56 2020 -0400
In replicator, when rescheduling, pick only pending jobs which are not running
Previously, when pending jobs were picked in the `ets:foldl` traversal, both
running and non-running jobs were considered and a large number of running jobs
could displace pending jobs in the accumulator. In the worst case, no crashed
jobs would be restarted during rescheduling.
---
src/couch_replicator/src/couch_replicator_scheduler.erl | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/src/couch_replicator/src/couch_replicator_scheduler.erl b/src/couch_replicator/src/couch_replicator_scheduler.erl
index 53c040e..641443a 100644
--- a/src/couch_replicator/src/couch_replicator_scheduler.erl
+++ b/src/couch_replicator/src/couch_replicator_scheduler.erl
@@ -456,6 +456,9 @@ pending_jobs(Count) when is_integer(Count), Count > 0 ->
[Job || {_Started, Job} <- gb_sets:to_list(Set1)].
+pending_fold(#job{pid = Pid}, Acc) when is_pid(Pid) ->
+ Acc;
+
pending_fold(Job, {Set, Now, Count, HealthThreshold}) ->
Set1 = case {not_recently_crashed(Job, Now, HealthThreshold),
gb_sets:size(Set) >= Count} of
@@ -1051,6 +1054,7 @@ scheduler_test_() ->
[
t_pending_jobs_simple(),
t_pending_jobs_skip_crashed(),
+ t_pending_jobs_skip_running(),
t_one_job_starts(),
t_no_jobs_start_if_max_is_0(),
t_one_job_starts_if_max_is_1(),
@@ -1112,6 +1116,18 @@ t_pending_jobs_skip_crashed() ->
end).
+t_pending_jobs_skip_running() ->
+ ?_test(begin
+ Job1 = continuous(1),
+ Job2 = continuous_running(2),
+ Job3 = oneshot(3),
+ Job4 = oneshot_running(4),
+ Jobs = [Job1, Job2, Job3, Job4],
+ setup_jobs(Jobs),
+ ?assertEqual([Job1, Job3], pending_jobs(4))
+ end).
+
+
t_one_job_starts() ->
?_test(begin
setup_jobs([oneshot(1)]),