How do I delete/clean Kafka queued messages without deleting Topic -

is there way delete queue messages without deleting kafka topics?
want delete queue messages when activating consumer.

i know there several ways like:

resetting retention time

$ ./bin/kafka-topics.sh --zookeeper localhost:2181 --alter --topic mytopic --config retention.ms=1000
deleting kafka files

$ rm -rf /data/kafka-logs/<topic/partition_name>

in 0.11 or higher can run bin/kafka-delete-records.sh command mark messages deletion.

for example publish 100 messages

seq 100 | ./bin/kafka-console-producer.sh --broker-list localhost:9092 --topic mytest

then delete 90 of 100 messages new kafka-delete-records.sh command line tool

./bin/kafka-delete-records.sh --bootstrap-server localhost:9092 --offset-json-file ./offsetfile.json

where offsetfile.json contains

 {"partitions": [{"topic": “mytest", "partition": 0, "offset": 90}], "version":1 }

and consume messages beginning verify 90 of 100 messages indeed marked deleted.

./bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic mytest --from-beginning 91 92 93 94 95 96 97 98 99 100

ANy