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Mahadev konar commented on ZOOKEEPER-856: ----------------------------------------- travis, we have had a lot of discussion on load balancing. I'd really want to try and see how the disconnect and reconnect works for load balancing. I am also with you that it might be a good enough soln on load balancing. I can upload a simple patch for this. Would you have some bandwidth trying and it out and reporting how well it works? > Connection imbalance leads to overloaded ZK instances > ----------------------------------------------------- > > Key: ZOOKEEPER-856 > URL: https://issues.apache.org/jira/browse/ZOOKEEPER-856 > Project: Zookeeper > Issue Type: Bug > Reporter: Travis Crawford > Attachments: zk_open_file_descriptor_count_members.gif, > zk_open_file_descriptor_count_total.gif > > > We've experienced a number of issues lately where "ruok" requests would take > upwards of 10 seconds to return, and ZooKeeper instances were extremely > sluggish. The sluggish instance requires a restart to make it responsive > again. > I believe the issue is connections are very imbalanced, leading to certain > instances having many thousands of connections, while other instances are > largely idle. > A potential solution is periodically disconnecting/reconnecting to balance > connections over time; this seems fine because sessions should not be > affected, and therefore ephemaral nodes and watches should not be affected. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.