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From Shanthoosh Venkataraman <>
Subject Re: Review Request 52476: SAMZA-1083 : Do not load task store which are older than delete tombstones.
Date Wed, 08 Feb 2017 20:00:43 GMT

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(Updated Feb. 8, 2017, 8 p.m.)

Review request for samza.

Repository: samza


Every local task store is backed up by a kafka changelog topic. Due to log compaction, delete
tombstones of the changelog topic have a ttl of Replaying the events
from the changelog that has missing delete tombstones, would result in creation of an inconsistent
local store(due to the missing of some delete events). This patch deletes the local stores
in which difference between current time and last modified time of the offset file is greater
than during the container startup.

Diffs (updated)

  samza-core/src/main/java/org/apache/samza/storage/ 9329edf7d724f3a0d9235354bb77936f713e3b5f

  samza-core/src/main/scala/org/apache/samza/config/StorageConfig.scala a3587d0a40c57374ee1742234929d444e381e42d

  samza-core/src/main/scala/org/apache/samza/container/SamzaContainer.scala c3308bfd7de04c335fef6cb66baa29286a230080

  samza-core/src/main/scala/org/apache/samza/storage/TaskStorageManager.scala 0b7bcdda1639eea8239a69c31bdf42558e9077d2

  samza-core/src/test/scala/org/apache/samza/storage/TestTaskStorageManager.scala 4d40f520e54beb643acd8410c772b75e2f6a9162

  samza-kafka/src/main/scala/org/apache/samza/config/KafkaConfig.scala 9320cf744ff90d647a198b51cb06d2a526fe68fa



Unit testing and manual testing has been done to verify the functionality.


Shanthoosh Venkataraman

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