diff --git a/lib/register_common/services/stream_client_kinesis.rb b/lib/register_common/services/stream_client_kinesis.rb
index 5ee4df2..5e877fe 100644
--- a/lib/register_common/services/stream_client_kinesis.rb
+++ b/lib/register_common/services/stream_client_kinesis.rb
@@ -67,12 +67,9 @@ def consume(consumer_id, limit: nil)
 
             last_record = nil
             resp.records.each do |record|
-              tag = begin
-                JSON.parse(record.data, symbolize_names: true)[:data][:links][:self]
-              rescue JSON::ParserError
-                nil
-              end
-              @logger.info "[#{shard_id}] [#{record.sequence_number}] #{tag}"
+              record_h = JSON.parse(record.data, symbolize_names: true)
+              @logger.info "[#{shard_id}] [#{record.sequence_number}] #{record_h[:data][:links][:self]}"
+
               yield msg_handler.process(record.data)
 
               record_count += 1
@@ -85,7 +82,7 @@ def consume(consumer_id, limit: nil)
             end
 
             iterators[shard_id] = resp.next_shard_iterator
-            store_sequence_number(consumer_id, shard_id, last_record.sequence_number)
+            store_sequence_number(consumer_id, shard_id, last_record.sequence_number) if last_record
 
             break if complete
           end
@@ -144,7 +141,7 @@ def store_sequence_number(consumer_id, shard_id, sequence_number)
       end
 
       def redis_key(consumer_id, shard_id)
-        "kinesis_#{consumer_id}_#{shard_id}"
+        ['kinesis', consumer_id, shard_id].join('_')
       end
     end
   end
diff --git a/lib/register_common/utils/expiring_set.rb b/lib/register_common/utils/expiring_set.rb
new file mode 100644
index 0000000..a4b74ef
--- /dev/null
+++ b/lib/register_common/utils/expiring_set.rb
@@ -0,0 +1,39 @@
+# frozen_string_literal: true
+
+require 'redis'
+
+module RegisterCommon
+  module Utils
+    class ExpiringSet
+      def initialize(redis: nil, namespace: nil, ttl: 60)
+        @redis = redis
+        @namespace = namespace
+        @ttl = ttl
+      end
+
+      def sadd(key, member)
+        t = Time.now.utc.to_i / @ttl
+        idx = _k_idx(key)
+        key1 = [idx, t].join('/')
+        @redis.sadd(idx, key1)
+        @redis.sadd(key1, member)
+        @redis.expire(key1, @ttl * 2, nx: true)
+      end
+
+      def sismember(key, member)
+        idx = _k_idx(key)
+        @redis.smembers(idx).each do |key1|
+          @redis.srem(idx, key1) unless @redis.exists?(key1)
+          return true if @redis.sismember(key1, member)
+        end
+        false
+      end
+
+      private
+
+      def _k_idx(key)
+        [@namespace, key].join('/')
+      end
+    end
+  end
+end
diff --git a/spec/unit/services/stream_client_kinesis_spec.rb b/spec/unit/services/stream_client_kinesis_spec.rb
index 956eef2..585e63d 100644
--- a/spec/unit/services/stream_client_kinesis_spec.rb
+++ b/spec/unit/services/stream_client_kinesis_spec.rb
@@ -25,10 +25,14 @@
         shard_iterator = 'iterator1'
         next_shard_iterator = 'next-iterator1'
         shards = double 'shards', shards: shard_ids.map { |shard_id| double('shard_id', shard_id:) }
-        records = [double('record', data: 'data1', sequence_number: 'seq1')]
+        record_h = { data: { links: { self: 'data1' } } }
+        records = [double('record', data: record_h.to_json, sequence_number: 'seq1')]
 
         expect(redis).to receive(:get).with('kinesis_consumer_id_shard1').and_return nil
         allow(redis).to receive(:set)
+        allow(redis).to receive(:smembers).and_return Set.new
+        allow(redis).to receive(:sadd)
+        allow(redis).to receive(:expire)
 
         expect(client).to receive(:list_shards).with(
           { stream_name: }
@@ -52,7 +56,7 @@
         records = []
         subject.consume(consumer_id, limit: 1) { |record| records << record }
 
-        expect(records).to eq ['data1']
+        expect(records).to eq [record_h.to_json]
         expect(redis).to have_received(:set).with(
           'kinesis_consumer_id_shard1', 'seq1'
         )
@@ -65,10 +69,14 @@
         shard_iterator = 'iterator1'
         next_shard_iterator = 'next-iterator1'
         shards = double 'shards', shards: shard_ids.map { |shard_id| double('shard_id', shard_id:) }
-        records = [double('record', data: 'data1', sequence_number: 'seq1')]
+        record_h = { data: { links: { self: 'data1' } } }
+        records = [double('record', data: record_h.to_json, sequence_number: 'seq1')]
 
         expect(redis).to receive(:get).with('kinesis_consumer_id_shard1').and_return 'stored-seq'
         allow(redis).to receive(:set)
+        allow(redis).to receive(:smembers).and_return Set.new
+        allow(redis).to receive(:sadd)
+        allow(redis).to receive(:expire)
 
         expect(client).to receive(:list_shards).with(
           { stream_name: }
@@ -92,7 +100,7 @@
         records = []
         subject.consume(consumer_id, limit: 1) { |record| records << record }
 
-        expect(records).to eq ['data1']
+        expect(records).to eq [record_h.to_json]
         expect(redis).to have_received(:set).with(
           'kinesis_consumer_id_shard1', 'seq1'
         )