viirya commented on PR #54302:
URL: https://github.com/apache/spark/pull/54302#issuecomment-3894781381

   Okay. branch-3.5 also has this issue.
   
   ```
   [info] - SPARK-55492: watermark on nested struct field *** FAILED *** (10 
milliseconds)
   [info]   java.lang.IllegalStateException: Failed to copy node.
   [info] Is otherCopyArgs specified correctly for EventTimeWatermark.
   [info] Exception message: java.lang.ClassCastException@7620d01e
   [info] ctor: public 
org.apache.spark.sql.catalyst.plans.logical.EventTimeWatermark(org.apache.spark.sql.catalyst.expressions.Attribute,org.apache.spark.unsafe.types.CalendarInterval,org.apache.spark.sql.catalyst.plans.logical.LogicalPlan)?
   [info] types: class org.apache.spark.sql.catalyst.expressions.Alias, class 
org.apache.spark.unsafe.types.CalendarInterval, class 
org.apache.spark.sql.catalyst.plans.logical.Project
   [info] args: kolona#284795.timestamp AS timestamp#284798, 0 seconds, Project 
[id#284789, nested_struct#284792 AS kolona#284795]
   [info] +- Project [value#284787 AS id#284789, struct(timestamp, 
timestamp_seconds(value#284787), value, cast(value#284787 as string)) AS 
nested_struct#284792]
   [info]    +- StreamingRelationV2 
org.apache.spark.sql.execution.streaming.MemoryStreamTableProvider$@50461597, 
memory, org.apache.spark.sql.execution.streaming.MemoryStreamTable@31f6a2fd, 
[], [value#284787]
   ```


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