[ 
https://issues.apache.org/jira/browse/KAFKA-7536?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Dmitry Minkovsky updated KAFKA-7536:
------------------------------------
    Description: 
I have a GlobalKTable that's defined as

{code}

GlobalKTable<String, ByteString> userIdsByEmail = topology          
   .globalTable(USER_IDS_BY_EMAIL.name,
                       USER_IDS_BY_EMAIL.consumed(),
                       Materialized.as("user-ids-by-email"));
{code}

And the following test in Spock:

{code}
    def topology = // my topology
    def driver = new TopologyTestDriver(topology, config())

    def cleanup() {
        driver.close()
    }

    def "create from email request"() {

        def store = driver.getKeyValueStore('user-ids-by-email')
        store.put('string', ByteString.copyFrom(new byte[0]))
        // more, but it fails at the `put` above
{code}

When I run this, I get the following:

{code}

[2018-10-23 19:35:27,055] INFO 
(org.apache.kafka.streams.processor.internals.GlobalStateManagerImpl) mock 
Restoring state for global store user-ids-by-email

java.lang.NullPointerException
        at 
org.apache.kafka.streams.processor.internals.AbstractProcessorContext.topic(AbstractProcessorContext.java:115)
        at 
org.apache.kafka.streams.state.internals.CachingKeyValueStore.putInternal(CachingKeyValueStore.java:237)
        at 
org.apache.kafka.streams.state.internals.CachingKeyValueStore.put(CachingKeyValueStore.java:220)
        at 
org.apache.kafka.streams.state.internals.CachingKeyValueStore.put(CachingKeyValueStore.java:38)
        at 
org.apache.kafka.streams.state.internals.InnerMeteredKeyValueStore.put(InnerMeteredKeyValueStore.java:206)
        at 
org.apache.kafka.streams.state.internals.MeteredKeyValueBytesStore.put(MeteredKeyValueBytesStore.java:117)
        at pony.message.MessageWriteStreamsTest.create from mailgun email 
request(MessageWriteStreamsTest.groovy:52)

[2018-10-23 19:35:27,189] INFO 
(org.apache.kafka.streams.processor.internals.StateDirectory) stream-thread 
[main] Deleting state directory 0_0 for task 0_0 as user calling cleanup.
{code}

The same issue applies to KTable.

I've noticed that I can {{put()}} to the store if I first write to it with 
{{driver.pipeInput}}. But otherwise I get the above error.

  was:
I have a GlobalKTable that's defined as

{code}

GlobalKTable<String, ByteString> userIdsByEmail = topology          
   .globalTable(USER_IDS_BY_EMAIL.name,
                       USER_IDS_BY_EMAIL.consumed(),
                       Materialized.as("user-ids-by-email"));
{code}

And the following test in Spock:

{code}
    def topology = // my topology
    def driver = new TopologyTestDriver(topology, config())

    def cleanup() {
        driver.close()
    }

    def "create from email request"() {

        def store = driver.getKeyValueStore('user-ids-by-email')
        store.put('string', ByteString.copyFrom(new byte[0]))
        // more, but it fails at the `put` above
{code}

When I run this, I get the following:

{code}

[2018-10-23 19:35:27,055] INFO 
(org.apache.kafka.streams.processor.internals.GlobalStateManagerImpl) mock 
Restoring state for global store user-ids-by-email

java.lang.NullPointerException
        at 
org.apache.kafka.streams.processor.internals.AbstractProcessorContext.topic(AbstractProcessorContext.java:115)
        at 
org.apache.kafka.streams.state.internals.CachingKeyValueStore.putInternal(CachingKeyValueStore.java:237)
        at 
org.apache.kafka.streams.state.internals.CachingKeyValueStore.put(CachingKeyValueStore.java:220)
        at 
org.apache.kafka.streams.state.internals.CachingKeyValueStore.put(CachingKeyValueStore.java:38)
        at 
org.apache.kafka.streams.state.internals.InnerMeteredKeyValueStore.put(InnerMeteredKeyValueStore.java:206)
        at 
org.apache.kafka.streams.state.internals.MeteredKeyValueBytesStore.put(MeteredKeyValueBytesStore.java:117)
        at pony.message.MessageWriteStreamsTest.create from mailgun email 
request(MessageWriteStreamsTest.groovy:52)

[2018-10-23 19:35:27,189] INFO 
(org.apache.kafka.streams.processor.internals.StateDirectory) stream-thread 
[main] Deleting state directory 0_0 for task 0_0 as user calling cleanup.
{code}

I've noticed that I can {{put()}} to the store if I first write to it with 
{{driver.pipeInput}}. But otherwise I get the above error.


> TopologyTestDriver cannot pre-populate KTable
> ---------------------------------------------
>
>                 Key: KAFKA-7536
>                 URL: https://issues.apache.org/jira/browse/KAFKA-7536
>             Project: Kafka
>          Issue Type: Bug
>          Components: streams
>    Affects Versions: 2.0.0
>            Reporter: Dmitry Minkovsky
>            Priority: Minor
>
> I have a GlobalKTable that's defined as
> {code}
> GlobalKTable<String, ByteString> userIdsByEmail = topology          
>    .globalTable(USER_IDS_BY_EMAIL.name,
>                        USER_IDS_BY_EMAIL.consumed(),
>                        Materialized.as("user-ids-by-email"));
> {code}
> And the following test in Spock:
> {code}
>     def topology = // my topology
>     def driver = new TopologyTestDriver(topology, config())
>     def cleanup() {
>         driver.close()
>     }
>     def "create from email request"() {
>         def store = driver.getKeyValueStore('user-ids-by-email')
>         store.put('string', ByteString.copyFrom(new byte[0]))
>         // more, but it fails at the `put` above
> {code}
> When I run this, I get the following:
> {code}
> [2018-10-23 19:35:27,055] INFO 
> (org.apache.kafka.streams.processor.internals.GlobalStateManagerImpl) mock 
> Restoring state for global store user-ids-by-email
> java.lang.NullPointerException
>       at 
> org.apache.kafka.streams.processor.internals.AbstractProcessorContext.topic(AbstractProcessorContext.java:115)
>       at 
> org.apache.kafka.streams.state.internals.CachingKeyValueStore.putInternal(CachingKeyValueStore.java:237)
>       at 
> org.apache.kafka.streams.state.internals.CachingKeyValueStore.put(CachingKeyValueStore.java:220)
>       at 
> org.apache.kafka.streams.state.internals.CachingKeyValueStore.put(CachingKeyValueStore.java:38)
>       at 
> org.apache.kafka.streams.state.internals.InnerMeteredKeyValueStore.put(InnerMeteredKeyValueStore.java:206)
>       at 
> org.apache.kafka.streams.state.internals.MeteredKeyValueBytesStore.put(MeteredKeyValueBytesStore.java:117)
>       at pony.message.MessageWriteStreamsTest.create from mailgun email 
> request(MessageWriteStreamsTest.groovy:52)
> [2018-10-23 19:35:27,189] INFO 
> (org.apache.kafka.streams.processor.internals.StateDirectory) stream-thread 
> [main] Deleting state directory 0_0 for task 0_0 as user calling cleanup.
> {code}
> The same issue applies to KTable.
> I've noticed that I can {{put()}} to the store if I first write to it with 
> {{driver.pipeInput}}. But otherwise I get the above error.



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