Matthias J. Sax created KAFKA-6121:
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Summary: Restore and global consumer should not use
auto.offset.reset
Key: KAFKA-6121
URL: https://issues.apache.org/jira/browse/KAFKA-6121
Project: Kafka
Issue Type: Bug
Components: streams
Affects Versions: 1.0.0
Reporter: Matthias J. Sax
Assignee: Matthias J. Sax
Fix For: 1.1.0, 1.0.1
Streams uses three different consumers internally. The main consumer, as well
as one consumer for state restore (restore consumer, also used by StandbyTasks)
and a consumer for global state (used by GlobalThreadThread). While main
consumer handles InvalidOffsetException correctly, restore and global consumer
don't. Currently, they rely on auto.offset.reset with default value "latest" --
thus, if there is an InvalidOffsetException we just jump to the end of the
changelog topic instead of proper handler this case.
An InvalidOffsetException can occur for two cases:
# An Kafka Streams application is offline for some time and on restart it reads
it local offset file. This offset file might contain offsets that are not valid
anymore as the log got compacted in between.
# Even if we have valid offset and we do a seek, log compaction can actually
tick an in the background at any point and could make our offset invalid --
this is a rather rare race conditions but we need to handle it anyway
For both cases, we can apply the same strategy: wipe out the local RocksDB,
seekToBeginning, and recreate the store from scratch.
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