Github user smungee commented on the pull request:
https://github.com/apache/spark/pull/13108#issuecomment-219198553
The bug is quite easy to reproduce. In `ExpressionEncoderSuite`, if you add
the following test case:
` encodeDecodeTest(Array(Timestamp.valueOf("2016-01-29 10:00:00")), "array
of timestamp")
`
... you will see that (without this fix) it fails with the following output:
```
- encode/decode for array of timestamp: [Ljava.sql.Timestamp;@fd9ebde ***
FAILED ***
Exception thrown while decoding
Converted: [0,1000000010,800000001,52a7ccdc36800]
Schema: value#61615
root
-- value: array (nullable = true)
|-- element: timestamp (containsNull = true)
Encoder:
class[value[0]: array<timestamp>] (ExpressionEncoderSuite.scala:312)
```
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