vamossagar12 commented on code in PR #14432:
URL: https://github.com/apache/kafka/pull/14432#discussion_r1405739030
##########
group-coordinator/src/test/java/org/apache/kafka/coordinator/group/consumer/TargetAssignmentBuilderTest.java:
##########
@@ -691,6 +735,91 @@ public void testDeleteMember() {
assertEquals(expectedAssignment, result.targetAssignment());
}
+ @Test
+ public void testStaticMemberReplace() {
+ TargetAssignmentBuilderTestContext context = new
TargetAssignmentBuilderTestContext(
+ "my-group",
+ 20
+ );
+
+ Uuid fooTopicId = context.addTopicMetadata("foo", 6,
Collections.emptyMap());
+ Uuid barTopicId = context.addTopicMetadata("bar", 6,
Collections.emptyMap());
+
+ context.addGroupMember("member-1", "member-1", Arrays.asList("foo",
"bar", "zar"), mkAssignment(
+ mkTopicAssignment(fooTopicId, 1, 2),
+ mkTopicAssignment(barTopicId, 1, 2)
+ ));
+
+ context.addGroupMember("member-2", "member-2", Arrays.asList("foo",
"bar", "zar"), mkAssignment(
+ mkTopicAssignment(fooTopicId, 3, 4),
+ mkTopicAssignment(barTopicId, 3, 4)
+ ));
+
+ context.addGroupMember("member-3", "member-3", Arrays.asList("foo",
"bar", "zar"), mkAssignment(
+ mkTopicAssignment(fooTopicId, 5, 6),
+ mkTopicAssignment(barTopicId, 5, 6)
+ ));
+
+ context.updateMemberSubscription("member-1", Arrays.asList("foo",
"bar", "zar"), Optional.of("member-1"), Optional.empty());
+ context.updateMemberSubscription("member-2", Arrays.asList("foo",
"bar", "zar"), Optional.of("member-2"), Optional.empty());
+ context.updateMemberSubscription("member-3", Arrays.asList("foo",
"bar", "zar"), Optional.of("member-3"), Optional.empty());
+
+ // Static member 3 leaves
+ context.removeMemberSubscription("member-3", "member-3");
+
+ // Another static member joins with the same instance id as the
departed one
+ context.addGroupMember("member-3-a", "member-3", Arrays.asList("foo",
"bar", "zar"), new HashMap<>());
Review Comment:
Ok.. I am slightly confused by this comment. The new member is being added
using `addGroupMember` which internally invokes `withMembers`. I had an
unwanted call to `updateMemberSubscription` which I have removed.
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