[
https://issues.apache.org/jira/browse/KAFKA-8143?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Matthias J. Sax resolved KAFKA-8143.
------------------------------------
Resolution: Duplicate
Thanks for reporting this [~lukestephenson]! Closing this as duplicated. It's
not a bug, but a limitation in the design.
The processor of a global store, is supposed to only load the data unmodified.
Actually Processing is not supported atm.
> Kafka-Streams GlobalStore cannot be read after application restart
> ------------------------------------------------------------------
>
> Key: KAFKA-8143
> URL: https://issues.apache.org/jira/browse/KAFKA-8143
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 2.1.1
> Reporter: Luke Stephenson
> Priority: Major
>
> I've created a small example application which has a trivial `Processor`
> which takes messages and stores the length of the String value rather than
> the value itself.
> That is, the following setup:
> {code:java}
> Topic[String, String]
> Processor[String, String]
> KeyValueStore[String, Long] // Note the Store persists Long values
> {code}
>
> The example application also has a Thread which periodically displays all
> values in the KeyValueStore.
> While the application is run, I can publish values to the topic with:
> {code:java}
> root@kafka:/opt/kafka# bin/kafka-console-producer.sh --property
> "parse.key=true" --property "key.separator=:" --broker-list localhost:9092
> --topic test.topic
> >1:hello
> >2:abc{code}
> And the background Thread will report the values persisted to the key value
> store.
> If the application is restarted, when attempting to read from the
> KeyValueStore it will fail. It attempts to recover the state from the
> persistent RocksDB store which fails with:
> {code:java}
> org.apache.kafka.common.errors.SerializationException: Size of data received
> by LongDeserializer is not 8{code}
> (Note there is no stack trace as SerializationException has disabled it.)
> Debugging appears to reveal that the original data from the Topic is being
> restored rather than what was modified by the processor.
> I've created a minimal example to show the issue at
> [https://github.com/lukestephenson/kafka-streams-example]
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
