[
https://issues.apache.org/jira/browse/KAFKA-8037?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16785420#comment-16785420
]
Patrik Kleindl commented on KAFKA-8037:
---------------------------------------
[~guozhang] Does that work too if LogAndContinueExceptionHandler is used or
will that "swallow" the error you mentioned above to know when to quit
restoring?
I am trying to work my way through the code and reproduce this with a test for
the global state stores but I might need some help there.
Just for my understanding, the TopologyDriver can't cover this scenario, or did
I miss something there?
Currently I am trying something similar to
GlobalStateManagerImplTest.shouldSkipNullKeysWhenRestoring but was not really
successful.
> KTable restore may load bad data
> --------------------------------
>
> Key: KAFKA-8037
> URL: https://issues.apache.org/jira/browse/KAFKA-8037
> Project: Kafka
> Issue Type: Improvement
> Components: streams
> Reporter: Matthias J. Sax
> Priority: Minor
>
> If an input topic contains bad data, users can specify a
> `deserialization.exception.handler` to drop corrupted records on read.
> However, this mechanism may be by-passed on restore. Assume a
> `builder.table()` call reads and drops a corrupted record. If the table state
> is lost and restored from the changelog topic, the corrupted record may be
> copied into the store, because on restore plain bytes are copied.
> If the KTable is used in a join, an internal `store.get()` call to lookup the
> record would fail with a deserialization exception if the value part cannot
> be deserialized.
> GlobalKTables are affected, too (cf. KAFKA-7663 that may allow a fix for
> GlobalKTable case). It's unclear to me atm, how this issue could be addressed
> for KTables though.
> Note, that user state stores are not affected, because they always have a
> dedicated changelog topic (and don't reuse an input topic) and thus the
> corrupted record would not be written into the changelog.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
