Fix crash in roundrobin assignor for asymmetrical subscriptions (conf…

…luentinc#2121) This also adds declarative unit tests of the assignors.
jwadel · May 5, 2020 · 8ba5df7 · 8ba5df7
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -41,6 +41,9 @@ librdkafka.
 
 ### Consumer fixes
 
+ * The roundrobin partition assignor could crash if subscriptions
+   where asymmetrical (different sets from different members of the group).
+   Thanks to @ankon and @wilmai for identifying the root cause (#2121).
  * Initial consumer group joins should now be a couple of seconds quicker
    thanks expedited query intervals (@benesch).
  * Don't propagate temporary offset lookup errors to application