Redis cache invalidateAll fails with jedis exception

Please see the attached directory and cache config.
Note : Using AWS ElastiCache, redis server : 2.8.19 (see redis-info.txt for more details)

Sometimes Nuxeo is able to store tokens in the cache like this "nuxeo:cache:sql-authTokens-entry-cache:a0245a09-f124-4dfa-b254-afb66dc5ca39". but randomly when creating or deleting entries from the directory call to directory.invalidateAll, fails with the attached exception and avoid to create/remove entry.
Note : Other directories using different cache doesn't get this exception.