GitHub user KyleWinkelman opened a pull request:
https://github.com/apache/kafka/pull/2963
Minor: Removed use of keySerde in CachingSessionStore.
CachingSessionStore wasn't properly using the default keySerde if no Serde
was supplied. I saw the below error in the logs for one of my test cases.
ERROR stream-thread
[cogroup-integration-test-3-5570fe48-d2a3-4271-80b1-81962295553d-StreamThread-6]
Streams application error during processing:
(org.apache.kafka.streams.processor.internals.StreamThread:335)
java.lang.NullPointerException
at
org.apache.kafka.streams.state.internals.CachingSessionStore.findSessions(CachingSessionStore.java:93)
at
org.apache.kafka.streams.kstream.internals.KStreamSessionWindowAggregate$KStreamSessionWindowAggregateProcessor.process(KStreamSessionWindowAggregate.java:94)
at
org.apache.kafka.streams.processor.internals.ProcessorNode$1.run(ProcessorNode.java:47)
at
org.apache.kafka.streams.processor.internals.StreamsMetricsImpl.measureLatencyNs(StreamsMetricsImpl.java:187)
at
org.apache.kafka.streams.processor.internals.ProcessorNode.process(ProcessorNode.java:133)
at
org.apache.kafka.streams.processor.internals.ProcessorContextImpl.forward(ProcessorContextImpl.java:82)
at
org.apache.kafka.streams.processor.internals.SourceNode.process(SourceNode.java:69)
at
org.apache.kafka.streams.processor.internals.StreamTask.process(StreamTask.java:206)
at
org.apache.kafka.streams.processor.internals.StreamThread.processAndPunctuate(StreamThread.java:657)
at
org.apache.kafka.streams.processor.internals.StreamThread.runLoop(StreamThread.java:728)
at
org.apache.kafka.streams.processor.internals.StreamThread.run(StreamThread.java:327)
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/KyleWinkelman/kafka
CachingSessionStore-fix-keySerde-use
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/kafka/pull/2963.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #2963
----
commit 41592448a401434df475a1dfb2ab2c4d2b6a0508
Author: Kyle Winkelman <[email protected]>
Date: 2017-05-03T01:52:05Z
Removed use of keySerde in CachingSessionStore and substituted serdes
which will contain the default keySerde if one is not supplied.
----
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
