[jira] [Resolved] (KAFKA-9192) NullPointerException if field in schema not present in value

["Randall Hauch (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-9192?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Randall Hauch resolved KAFKA-9192.
----------------------------------
    Fix Version/s: 2.4.1
                   2.3.2
                   2.5.0
                   2.2.3
         Reviewer: Randall Hauch
       Resolution: Fixed

Merged to the `trunk`, `2.5`, `2.4`, `2.3`, and `2.2` branches.

> NullPointerException if field in schema not present in value
> ------------------------------------------------------------
>
>                 Key: KAFKA-9192
>                 URL: https://issues.apache.org/jira/browse/KAFKA-9192
>             Project: Kafka
>          Issue Type: Bug
>          Components: KafkaConnect
>    Affects Versions: 2.2.1
>            Reporter: Mark Tinsley
>            Priority: Major
>             Fix For: 2.2.3, 2.5.0, 2.3.2, 2.4.1
>
>
> Given a message:
> {code:java}
> {
>    "schema":{
>       "type":"struct",
>       "fields":[
>          {
>             "type":"string",
>             "optional":true,
>             "field":"abc"
>          }
>       ],
>       "optional":false,
>       "name":"foobar"
>    },
>    "payload":{
>    }
> }
> {code}
> I would expect, given the field is optional, for the JsonConverter to still process this value. 
> What happens is I get a null pointer exception, the stacktrace points to this line: https://github.com/apache/kafka/blob/2.1/connect/json/src/main/java/org/apache/kafka/connect/json/JsonConverter.java#L701 called by https://github.com/apache/kafka/blob/2.1/connect/json/src/main/java/org/apache/kafka/connect/json/JsonConverter.java#L181
> Issue seems to be that we need to check and see if the jsonValue is null before checking if the jsonValue has a null value.



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