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  1. Kafka
  2. KAFKA-6878

NPE when querying global state store not in READY state

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Details

    • Bug
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • 1.1.0
    • 1.1.1, 2.0.0
    • streams
    • None

    Description

      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:

      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)

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            Unassigned Unassigned
            Slytherin Salazar
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              Created:
              Updated:
              Resolved: