Folks I am trying to ingest from kinesis stream and I am getting this error:

Caught exception while decoding row

These mostly seem to be from my transformation functions, I have used some in-built functions and for those specific functions the stack trace indicated what problems could be and I have fixed them. However I also needed from groovy scripts too and I executed this scripts standalone to check if they are working fine and they do However it still does not seem to be decoding row and I am not able to now figure out where the problem is. The stack trace I get is something like:

org.apache.pinot.shaded.com.fasterxml.jackson.core.JsonParseException: Invalid UTF-8 start byte 0x89
 at [Source: (ByteArrayInputStream); line: 1, column: 3]
	at org.apache.pinot.shaded.com.fasterxml.jackson.core.JsonParser._constructError(JsonParser.java:2337) ~[pinot-all-0.13.0-SNAPSHOT-jar-with-dependencies.jar:0.13.0-SNAPSHOT-782c3c2df59d2b173ba9ef595aeabd27cb00a332]
	at org.apache.pinot.shaded.com.fasterxml.jackson.core.base.ParserMinimalBase._reportError(ParserMinimalBase.java:710) ~[pinot-all-0.13.0-SNAPSHOT-jar-with-dependencies.jar:0.13.0-SNAPSHOT-782c3c2df59d2b173ba9ef595aeabd27cb00a332]
	at org.apache.pinot.shaded.com.fasterxml.jackson.core.json.UTF8StreamJsonParser._reportInvalidInitial(UTF8StreamJsonParser.java:3607) ~[pinot-all-0.13.0-SNAPSHOT-jar-with-dependencies.jar:0.13.0-SNAPSHOT-782c3c2df59d2b173ba9ef595aeabd27cb00a332]
	at org.apache.pinot.shaded.com.fasterxml.jackson.core.json.UTF8StreamJsonParser._decodeCharForError(UTF8StreamJsonParser.java:3350) ~[pinot-all-0.13.0-SNAPSHOT-jar-with-dependencies.jar:0.13.0-SNAPSHOT-782c3c2df59d2b173ba9ef595aeabd27cb00a332]
	at org.apache.pinot.shaded.com.fasterxml.jackson.core.json.UTF8StreamJsonParser._reportInvalidToken(UTF8StreamJsonParser.java:3582) ~[pinot-all-0.13.0-SNAPSHOT-jar-with-dependencies.jar:0.13.0-SNAPSHOT-782c3c2df59d2b173ba9ef595aeabd27cb00a332]
	at org.apache.pinot.shaded.com.fasterxml.jackson.core.json.UTF8StreamJsonParser._handleUnexpectedValue(UTF8StreamJsonParser.java:2688) ~[pinot-all-0.13.0-SNAPSHOT-jar-with-dependencies.jar:0.13.0-SNAPSHOT-782c3c2df59d2b173ba9ef595aeabd27cb00a332]
	at org.apache.pinot.shaded.com.fasterxml.jackson.core.json.UTF8StreamJsonParser._nextTokenNotInObject(UTF8StreamJsonParser.java:870) ~[pinot-all-0.13.0-SNAPSHOT-jar-with-dependencies.jar:0.13.0-SNAPSHOT-782c3c2df59d2b173ba9ef595aeabd27cb00a332]
	at org.apache.pinot.shaded.com.fasterxml.jackson.core.json.UTF8StreamJsonParser.nextToken(UTF8StreamJsonParser.java:762) ~[pinot-all-0.13.0-SNAPSHOT-jar-with-dependencies.jar:0.13.0-SNAPSHOT-782c3c2df59d2b173ba9ef595aeabd27cb00a332]
	at org.apache.pinot.shaded.com.fasterxml.jackson.databind.ObjectReader._bindAsTree(ObjectReader.java:2058) ~[pinot-all-0.13.0-SNAPSHOT-jar-with-dependencies.jar:0.13.0-SNAPSHOT-782c3c2df59d2b173ba9ef595aeabd27cb00a332]
	at org.apache.pinot.shaded.com.fasterxml.jackson.databind.ObjectReader._bindAndCloseAsTree(ObjectReader.java:2044) ~[pinot-all-0.13.0-SNAPSHOT-jar-with-dependencies.jar:0.13.0-SNAPSHOT-782c3c2df59d2b173ba9ef595aeabd27cb00a332]
	at org.apache.pinot.shaded.com.fasterxml.jackson.databind.ObjectReader.readTree(ObjectReader.java:1739) ~[pinot-all-0.13.0-SNAPSHOT-jar-with-dependencies.jar:0.13.0-SNAPSHOT-782c3c2df59d2b173ba9ef595aeabd27cb00a332]
	at org.apache.pinot.spi.utils.JsonUtils.bytesToJsonNode(JsonUtils.java:211) ~[pinot-all-0.13.0-SNAPSHOT-jar-with-dependencies.jar:0.13.0-SNAPSHOT-782c3c2df59d2b173ba9ef595aeabd27cb00a332]
	at org.apache.pinot.plugin.inputformat.json.JSONMessageDecoder.decode(JSONMessageDecoder.java:61) [pinot-all-0.13.0-SNAPSHOT-jar-with-dependencies.jar:0.13.0-SNAPSHOT-782c3c2df59d2b173ba9ef595aeabd27cb00a332]
	at org.apache.pinot.plugin.inputformat.json.JSONMessageDecoder.decode(JSONMessageDecoder.java:73) [pinot-all-0.13.0-SNAPSHOT-jar-with-dependencies.jar:0.13.0-SNAPSHOT-782c3c2df59d2b173ba9ef595aeabd27cb00a332]
	at org.apache.pinot.plugin.inputformat.json.JSONMessageDecoder.decode(JSONMessageDecoder.java:37) [pinot-all-0.13.0-SNAPSHOT-jar-with-dependencies.jar:0.13.0-SNAPSHOT-782c3c2df59d2b173ba9ef595aeabd27cb00a332]
	at org.apache.pinot.spi.stream.StreamDataDecoderImpl.decode(StreamDataDecoderImpl.java:47) [pinot-all-0.13.0-SNAPSHOT-jar-with-dependencies.jar:0.13.0-SNAPSHOT-782c3c2df59d2b173ba9ef595aeabd27cb00a332]
	at org.apache.pinot.core.data.manager.realtime.LLRealtimeSegmentDataManager.processStreamEvents(LLRealtimeSegmentDataManager.java:549) [pinot-all-0.13.0-SNAPSHOT-jar-with-dependencies.jar:0.13.0-SNAPSHOT-782c3c2df59d2b173ba9ef595aeabd27cb00a332]
	at org.apache.pinot.core.data.manager.realtime.LLRealtimeSegmentDataManager.consumeLoop(LLRealtimeSegmentDataManager.java:434) [pinot-all-0.13.0-SNAPSHOT-jar-with-dependencies.jar:0.13.0-SNAPSHOT-782c3c2df59d2b173ba9ef595aeabd27cb00a332]
	at org.apache.pinot.core.data.manager.realtime.LLRealtimeSegmentDataManager$PartitionConsumer.run(LLRealtimeSegmentDataManager.java:629) [pinot-all-0.13.0-SNAPSHOT-jar-with-dependencies.jar:0.13.0-SNAPSHOT-782c3c2df59d2b173ba9ef595aeabd27cb00a332]
	at java.lang.Thread.run(Thread.java:832) [?:?]

Is there a way to debug is better ?