I am getting the below error in ActiveMQ logs

"INFO | Slow KahaDB access: cleanup took 761". After this error, my consumer is not consuming any message from the queue. After restarting my consumer, it started reading from queue. On googling it, I found that the above error message is because of kahadb indexing. But i wanted to know why the consumer stops consuming message even after indexing is complete?. Persistence is set to false in my activemq configuration. kindly provide me if there is any configuration needs to be done with kahadb?