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Fix race in entity_platform.async_add_entities #19222

merged 1 commit into from Dec 14, 2018


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emontnemery commented Dec 12, 2018


There is a race in entity_platform.async_add_entities() which makes the check for duplicated entity_id fail. This in turns may cause several entities to be created with the same entity_id.
The issue can very easily be reproduced by publishing two persistent MQTT discovery messages with same name before starting hass, one of which has unique_id set.

This is a follow-up to #18445, now also fixing the case for entities which are added to the device registry.


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  • Local tests pass with tox. Your PR cannot be merged unless tests pass
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@emontnemery emontnemery requested a review from home-assistant/core as a code owner Dec 12, 2018

@wafflebot wafflebot bot added the in progress label Dec 12, 2018

@emontnemery emontnemery added this to the 0.84.2 milestone Dec 14, 2018

@emontnemery emontnemery requested a review from Kane610 Dec 14, 2018

@balloob balloob merged commit 7a7c2ad into home-assistant:dev Dec 14, 2018

5 checks passed

Hound No violations found. Woof!
WIP ready for review
cla-bot Everyone involved has signed the CLA
continuous-integration/travis-ci/pr The Travis CI build passed
coverage/coveralls First build on async_add_entities_race at 92.889%

@wafflebot wafflebot bot removed the in progress label Dec 14, 2018

balloob added a commit that referenced this pull request Dec 14, 2018

@balloob balloob referenced this pull request Dec 14, 2018


0.84.2 #19281

mxworm added a commit to mxworm/home-assistant that referenced this pull request Dec 14, 2018

Merge branch 'dev' into current
* dev: (88 commits)
  huawei_lte: Fetch only required data (home-assistant#17618)
  Adding support for Plum Lightpad (home-assistant#16576)
  Fix restore state for manual alarm control panel (home-assistant#19284)
  Set InsteonEntity name to be combo of description and address. (home-assistant#17262)
  Device config for Fibaro hub integration (home-assistant#19171)
  Add air pollutants component (home-assistant#18707)
  Updated ELIQ Online sensor to async API (home-assistant#19248)
  Set unavailable when unreachable (home-assistant#19012)
  Make variable `entity_id` available to value_template for MQTT binary sensor (home-assistant#19195)
  home-assistant#17333: update to use DOMAIN constants and standards. (home-assistant#19242)
  Fix race in entity_platform.async_add_entities (home-assistant#19222)
  Fix race in entity_platform.async_add_entities (home-assistant#19222)
  Bumped version to 0.84.2
  Fix call to super() (home-assistant#19279)
  Fix OwnTracks deadlocking (home-assistant#19260)
  Fix list (fixes home-assistant#19235) (home-assistant#19258)
  Add automation and script events to logbook filter events (home-assistant#19253)
  Bump aioasuswrt (home-assistant#19229)
  Review comments
  Move check to websocket

@emontnemery emontnemery deleted the emontnemery:async_add_entities_race branch Dec 19, 2018

@alex3305 alex3305 referenced this pull request Dec 22, 2018


Observation reset #214

dshokouhi added a commit to dshokouhi/home-assistant that referenced this pull request Dec 25, 2018

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