[jira] [Created] (KAFKA-6878) NPE when querying global state store not in READY state

["Salazar (JIRA)" <ji...@apache.org>]

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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