abhijeetkushe opened a new issue #8070:
URL: https://github.com/apache/pinot/issues/8070


   Table Config
   ```{
     "tableName": "workflowEvents",
     "tableType": "REALTIME",
     "segmentsConfig": {
       "timeColumnName": "eventTimestamp",
       "timeType": "MILLISECONDS",
       "schemaName": "workflowEvents",
       "replicasPerPartition": "1",
       "retentionTimeUnit": "DAYS",
       "retentionTimeValue": "365",
       "segmentPushType": "APPEND"
     },
     "tenants": {
       "broker":"DefaultTenant",
       "server":"DefaultTenant"
     },
     "tableIndexConfig": {
       "loadMode": "MMAP",
       "streamConfigs": {
         "streamType": "kinesis",
         "stream.kinesis.topic.name": "prod-rel-cdp-dl-workflow-metrics-stream",
         "region": "us-east-1",
         "shardIteratorType": "LATEST",
         "stream.kinesis.consumer.type": "lowlevel",
         "stream.kinesis.fetch.timeout.millis": "30000",
         "stream.kinesis.decoder.class.name": 
"org.apache.pinot.plugin.stream.kafka.KafkaJSONMessageDecoder",
         "stream.kinesis.consumer.factory.class.name": 
"org.apache.pinot.plugin.stream.kinesis.KinesisConsumerFactory",
         "realtime.segment.flush.threshold.size": "5000000",
         "realtime.segment.flush.threshold.time": "1d"
       }
     },
     "upsertConfig": {
       "mode": "FULL"
     },
     "routing": {
       "instanceSelectorType": "strictReplicaGroup"
     },
     "metadata": {
       "customConfigs": {}
     }
   }
   ```
   
   - I upgraded pinot to 0.9.1 version from 0.8.0 last month and after that I 
started seeing GetRecord.IteratorAgeInMilliseconds metrics displaying in 
correct values
   - Yesterday I observed the data stopped being displayed in the Table from 
the Query Console even though the GetRecords metrics showed that records were 
read but where not read from the Table.There were some new data fields that 
were added to the record but the schema was not updated
   - I decided to change Table config to AT_SEQUENCE_NUMBER and I did not see 
the changes immediately but this morning I was able to see those records but 
post that when records were added this morning they were not being reflected in 
the table
   - I decided to switch the Table config back to LATEST.I also saw that the 
old segments got terminated and new segments were created but the records were 
still not reflected in the Table
   So both the data issue and GetRecord.IteratorAgeInMilliseconds  still persist


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