# No enum constant org.logstash.bivalues.BiValues **URL:** \ **Category:** Logstash\ **Created:** [August 25, 2017, 3:13pm UTC](https://discuss.elastic.co/t/no-enum-constant-org-logstash-bivalues-bivalues/98388 "2017-08-25T15:13:58Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Dan\_Markhasin](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dan_markhasin/32/14187_2.png) [@Dan\_Markhasin](https://discuss.elastic.co/u/Dan_Markhasin)\ **Post date:** [August 25, 2017, 3:13pm UTC](https://discuss.elastic.co/t/no-enum-constant-org-logstash-bivalues-bivalues/98388/1 "2017-08-25T15:13:58Z")
Following this thread: > [@Logstash 5.4 - Repeated deserialization errors and losing data with Persistent Queues](https://discuss.elastic.co/t/logstash-5-4-repeated-deserialization-errors-and-losing-data-with-persistent-queues/91503): > > Hi, We are getting repeated deserialization errors with Persistent Queues. Environment: Logstash 5.4.1 (unmodified CentOS image from elastic repos) 200GB SSD mounted disk for the queue Persistent queues enabled Logstash configuration: pipeline.workers: 2 queue.type: persisted queue.max\_bytes: 150gb We set no other queue-related config (except stuff like http bind address), and we leave everything else to logstash defaults. The error starts to happen when Logstash is running. Please note, w… I encountered the same issue when using the Kafka input plugin with a ByteArrayDeserializer as the kafka key deserializer class. This adds a byte field to the event, causing the exception described in the other thread. Are there any plans to address this? ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [September 22, 2017, 3:14pm UTC](https://discuss.elastic.co/t/no-enum-constant-org-logstash-bivalues-bivalues/98388/2 "2017-09-22T15:14:01Z")
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