1.x: fix replay() retaining reference to the child Subscriber#4229
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akarnokd merged 1 commit intoReactiveX:1.xfrom Jul 23, 2016
Merged
1.x: fix replay() retaining reference to the child Subscriber#4229akarnokd merged 1 commit intoReactiveX:1.xfrom
akarnokd merged 1 commit intoReactiveX:1.xfrom
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Current coverage is 84.20% (diff: 61.53%)@@ 1.x #4229 diff @@
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Files 265 265
Lines 17305 17314 +9
Methods 0 0
Messages 0 0
Branches 2624 2627 +3
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+ Hits 14559 14579 +20
+ Misses 1893 1884 -9
+ Partials 853 851 -2
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This is a medium impact bug so it would be great if it made into tomorrow's release. /cc @artem-zinnatullin @zsxwing |
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In #3470, a flat cache of Subscribers has been introduced that is versioned and gets only updated if there are new Subscribers coming, old Subscribers leaving and a value comes through - improving performance if lots of Subscribers come and go between main onNext signals. This cache is not cleared but rebuilt therefore child Subscribers unsubscribing were still referenced through it and everything beyond - leading to memory leak on sensitive systems.
The fix is to cut the link to the child Subscriber in
InnerProduceron unsubscription. A secondary action also empties the cache if all Subscribers are gone.Reported in #4228 .