stanislavkozlovski commented on a change in pull request #9065:
URL: https://github.com/apache/kafka/pull/9065#discussion_r459640134
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File path: core/src/test/scala/unit/kafka/cluster/PartitionLockTest.scala
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@@ -116,6 +117,56 @@ class PartitionLockTest extends Logging {
future.get(15, TimeUnit.SECONDS)
}
+ /**
+ * Concurrently calling updateAssignmentAndIsr should always ensure that
non-lock access
+ * to the inner remoteReplicaMap (accessed by getReplica) cannot see an
intermediate state
+ * where replicas present both in the old and new assignment are missing
+ */
+ @Test
+ def testGetReplicaWithUpdateAssignmentAndIsr(): Unit = {
+ val active = new AtomicBoolean(true)
+ val replicaToCheck = 3
+ val firstReplicaSet = Seq[Integer](3, 4, 5).asJava
+ val secondReplicaSet = Seq[Integer](1, 2, 3).asJava
+ def partitionState(replicas: java.util.List[Integer]):
LeaderAndIsrPartitionState = new LeaderAndIsrPartitionState()
+ .setControllerEpoch(1)
+ .setLeader(replicas.get(0))
+ .setLeaderEpoch(1)
+ .setIsr(replicas)
+ .setZkVersion(1)
+ .setReplicas(replicas)
+ .setIsNew(true)
+ val offsetCheckpoints: OffsetCheckpoints = mock(classOf[OffsetCheckpoints])
+ // Update replica set synchronously first to avoid race conditions
+ partition.makeLeader(partitionState(secondReplicaSet), offsetCheckpoints)
+ assertTrue(s"Expected replica $replicaToCheck to be defined",
partition.getReplica(replicaToCheck).isDefined)
+
+ var i = 0
Review comment:
Yeah, nice catch
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