Chris Riccomini created SAMZA-55:
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             Summary: StringSerde doesn't handle null
                 Key: SAMZA-55
                 URL: https://issues.apache.org/jira/browse/SAMZA-55
             Project: Samza
          Issue Type: Bug
          Components: container
    Affects Versions: 0.6.0
            Reporter: Chris Riccomini
             Fix For: 0.7.0


The StringSerde throws an NPE if it is asked to toBytes/fromBytes a null object.

Kafka returns a null object when no key is specified. If the key serde to 
string for the stream, this will trigger an NPE.

Rather than having to configure each stream's key serde accordingly, it'd be 
nice to just always turn the key serde on, and have it do the right thing when 
a null key is received.



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