So , it means when elements leave map => sit in buffer (due to partitioner) => enter flatmap
Since Hbase op in flat map are taking time lets say 1 sec per operation , next element will not be read from buffer until HBase Op is done. Due to this Hbase op , time to enter to flat map from map will get accumulated for elements waiting in buffer . Let me know if I understood correctly ? -- View this message in context: http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Partitioner-is-spending-around-2-to-4-minutes-while-pushing-data-to-next-operator-tp13913p14072.html Sent from the Apache Flink User Mailing List archive. mailing list archive at Nabble.com.