KAFKA-7837: Ensure we do not shrink ISR for offline partitions #6202
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Thanks for the PR. It's good to include details in the PR description about fixes like this. |
junrao
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Jan 26, 2019
jarekr
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Apr 18, 2019
* ak/trunk: MINOR: Update usage of deprecated API (apache#6146) KAFKA-4217: Add KStream.flatTransform (apache#5273) MINOR: Update Gradle to 5.1.1 (apache#6160) KAFKA-3522: Generalize Segments (apache#6170) Added quotes around the class path (apache#4469) KAFKA-7837: Ensure offline partitions are picked up as soon as possible when shrinking ISR (apache#6202) MINOR: In the MetadataResponse schema, ignorable should be a boolean KAFKA-7838: Log leader and follower end offsets when shrinking ISR (apache#6168) KAFKA-5692: Change PreferredReplicaLeaderElectionCommand to use Admin… (apache#3848) MINOR: clarify why suppress can sometimes drop tombstones (apache#6195) MINOR: Upgrade ducktape to 0.7.5 (apache#6197) MINOR: Improve IntegrationTestUtils documentation (apache#5664) MINOR: upgrade to jdk8 8u202 KAFKA-7693; Fix SequenceNumber overflow in producer (apache#5989) KAFKA-7692; Fix ProducerStateManager SequenceNumber overflow (apache#5990) MINOR: update copyright year in the NOTICE file. (apache#6196) KAFKA-7793: Improve the Trogdor command line. (apache#6133)
pengxiaolong
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Jun 14, 2019
…le when shrinking ISR (apache#6202) Check if a partition is offline while iterating all partitions. Reviewers: Jun Rao <junrao@gmail.com>
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When a partition is marked offline due to a failed disk, the leader is supposed to not shrink its ISR any more. In
ReplicaManager#maybeShrinkIsr, we iterate through all non-offline partitions to shrink the ISR. If an ISR needs to shrink, we need to write the new ISR to ZK, which can take a bit of time. In this window, some partitions could now be marked as offline, but may not be picked up by the iterator. This is because the offline partition iterator used inReplicaManager#maybeShrinkIsris weakly consistent and does not necessarily reflect the updated offline state.This patch fixes the above issue by iterating through all topic partitions and checking whether the partition has been made offline within the iteration. This helps ensure we detect a partition being made offline during the iteration and prevent ISRs from shrinking thereof.