[jira] [Created] (KAFKA-5891) Cast transformation fails if record schema contains timestamp field

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

Artem Plotnikov created KAFKA-5891:
--------------------------------------

             Summary: Cast transformation fails if record schema contains timestamp field
                 Key: KAFKA-5891
                 URL: https://issues.apache.org/jira/browse/KAFKA-5891
             Project: Kafka
          Issue Type: Bug
          Components: KafkaConnect
    Affects Versions: 0.11.0.0
            Reporter: Artem Plotnikov


I have the following simple type cast transformation:
```
name=postgresql-source-simple
connector.class=io.confluent.connect.jdbc.JdbcSourceConnector
tasks.max=1

connection.url=jdbc:postgresql://localhost:5432/testdb?user=postgres&password=mysecretpassword
query=SELECT 1::INT as a, '2017-09-14 10:23:54'::TIMESTAMP as b

transforms=Cast
transforms.Cast.type=org.apache.kafka.connect.transforms.Cast$Value
transforms.Cast.spec=a:boolean

mode=bulk
topic.prefix=clients
```
Which fails with the following exception in runtime:
```
[2017-09-14 16:51:01,885] ERROR Task postgresql-source-simple-0 threw an uncaught and unrecoverable exception (org.apache.kafka.connect.runtime.WorkerTask:148)
org.apache.kafka.connect.errors.DataException: Invalid Java object for schema type INT64: class java.sql.Timestamp for field: "null"
	at org.apache.kafka.connect.data.ConnectSchema.validateValue(ConnectSchema.java:239)
	at org.apache.kafka.connect.data.ConnectSchema.validateValue(ConnectSchema.java:209)
	at org.apache.kafka.connect.data.Struct.put(Struct.java:214)
	at org.apache.kafka.connect.transforms.Cast.applyWithSchema(Cast.java:152)
	at org.apache.kafka.connect.transforms.Cast.apply(Cast.java:108)
	at org.apache.kafka.connect.runtime.TransformationChain.apply(TransformationChain.java:38)
	at org.apache.kafka.connect.runtime.WorkerSourceTask.sendRecords(WorkerSourceTask.java:190)
	at org.apache.kafka.connect.runtime.WorkerSourceTask.execute(WorkerSourceTask.java:168)
	at org.apache.kafka.connect.runtime.WorkerTask.doRun(WorkerTask.java:146)
	at org.apache.kafka.connect.runtime.WorkerTask.run(WorkerTask.java:190)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
```
If I remove the  transforms.* part of the connector it will work correctly. Actually, it doesn't really matter which types I use in the transformation for field 'a', just the existence of a timestamp field brings the exception.



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