KDA Studio App keep throwing glue getFunction error, but I didn't use any glue function

I followed this AWS blog post to create KDA app, and change the output sink into s3 instead of data stream, everything is working, and I can get the result in s3.

However in the KDA error logs, glue keep throwing getFunction error almost every second I run the deployed app, but I only use glue to define input/output schemas, didn't use any glue function, so I wonder where is it come form. Please help to take a look.

@logStream
kinesis-analytics-log-stream
@message
{"locationInformation":"com.amazonaws.glue.catalog.metastore.GlueMetastoreClientDelegate.getFunction(GlueMetastoreClientDelegate.java:1915)","logger":"com.amazonaws.glue.catalog.metastore.GlueMetastoreClientDelegate","message":"software.amazon.kinesisanalytics.shaded.com.amazonaws.services.glue.model.EntityNotFoundException: Cannot find function. (Service: AWSGlue; Status Code: 400; Error Code: EntityNotFoundException; Request ID: <Request ID>; Proxy: null)","threadName":"Thread-20","applicationARN":<applicationARN>,"applicationVersionId":"1","messageSchemaVersion":"1","messageType":"ERROR"}
@timestamp
<timestamp>
applicationARN
<applicationARN>
applicationVersionId
1
locationInformation
com.amazonaws.glue.catalog.metastore.GlueMetastoreClientDelegate.getFunction(GlueMetastoreClientDelegate.java:1915)
logger
com.amazonaws.glue.catalog.metastore.GlueMetastoreClientDelegate
message
software.amazon.kinesisanalytics.shaded.com.amazonaws.services.glue.model.EntityNotFoundException: Cannot find function. (Service: AWSGlue; Status Code: 400; Error Code: EntityNotFoundException; Request ID:<Request ID>; Proxy: null)
messageSchemaVersion
1
messageType
ERROR
threadName
Thread-20

``