Salazar created KAFKA-6878:
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Summary: NPE when querying global state store not in READY state
Key: KAFKA-6878
URL: https://issues.apache.org/jira/browse/KAFKA-6878
Project: Kafka
Issue Type: Bug
Affects Versions: 1.1.0
Reporter: Salazar
Info: using kafka 1.1.0 - confluent 4.1.0
We're trying to query a global state store, but if we query too quickly after
the application is started we get a
NullPointerException(CachingKeyValueStore.java:166).
We have verified the key is nonNull.
If we wait long enough (with our current amount of data 5 minutes after start)
we get an answer but before then we get NPEs.
Looks like there isn't a check to ensure `initInternal` actually sets the cache
before you're allowed to use it in the get method
stacktrace:
{code:java}
java.lang.NullPointerException: null
at
org.apache.kafka.streams.state.internals.CachingKeyValueStore.getInternal(CachingKeyValueStore.java:166)
at
org.apache.kafka.streams.state.internals.CachingKeyValueStore.get(CachingKeyValueStore.java:159)
at
org.apache.kafka.streams.state.internals.CachingKeyValueStore.get(CachingKeyValueStore.java:38)
at
org.apache.kafka.streams.state.internals.InnerMeteredKeyValueStore.get(InnerMeteredKeyValueStore.java:183)
at
org.apache.kafka.streams.state.internals.MeteredKeyValueBytesStore.get(MeteredKeyValueBytesStore.java:112)
at
org.apache.kafka.streams.state.internals.CompositeReadOnlyKeyValueStore.get(CompositeReadOnlyKeyValueStore.java:55)
at
io.repository.VisitRepositoryKafka.findByVisitTrackingId(VisitRepositoryKafka.java:76)
{code}
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