Hi Anton, Thank you for the reply .
>>I can confirm that there is no SEGMENTED event thrown on 2.8.1. I guess you meant that there is no SEGMENTED event thrown in 2.8.1 client when the servers are brought down and started again. Because SEGMENTED event could be thrown in 2.8.1 in other scenarios as well I guess, like a long GC pause . I have captured the logs for 2.7.6 client , where it receives a SEGMENTED event. On closer look, it looks like the client's attempt to reconnect failed in this case with 'Authentication Failure' and this has caused the SEGMENTED event. Check this part of the log in the attached log : 2020-10-08 09:59:33,327 [tcp-client-disco-msg-worker-#4%ProjectClient-null-igniteclient-SINGLE%] ERROR com.company.projectname.project.common.plugin.discoveryspi.CustomTcpDiscoverySpi [] - Failed to reconnect, segment local node. org.apache.ignite.spi.IgniteSpiException: Authentication failed at org.apache.ignite.spi.discovery.tcp.TcpDiscoverySpi.checkFailedError(TcpDiscoverySpi.java:1946) ~[ignite-core-2.7.6.jar:2.7.6] at org.apache.ignite.spi.discovery.tcp.ClientImpl$MessageWorker.body(ClientImpl.java:1888) ~[ignite-core-2.7.6.jar:2.7.6] at org.apache.ignite.internal.util.worker.GridWorker.run(GridWorker.java:120) ~[ignite-core-2.7.6.jar:2.7.6] at org.apache.ignite.spi.discovery.tcp.ClientImpl$1.body(ClientImpl.java:304) ~[ignite-core-2.7.6.jar:2.7.6] at org.apache.ignite.spi.IgniteSpiThread.run(IgniteSpiThread.java:62) ~[ignite-core-2.7.6.jar:2.7.6] 2020-10-08 09:59:33,328 [tcp-client-disco-msg-worker-#4%ProjectClient-null-igniteclient-SINGLE%] DEBUG In 2.8.1, we have changed the security plugin , hence looks like the client is able to reconnect successfully. In terms of the client, do we need to have the below 2 EVENT handlers? : 1. EVT_NODE_SEGMENTED - to restart the node and deploy and continuous queries if needed. 2. EVT_CLIENT_NODE_RECONNECTED - to just deploy the continuous queries ( no restart of node needed, since the node is already connected ) SegmentedClientLogs.txt <http://apache-ignite-users.70518.x6.nabble.com/file/t2757/SegmentedClientLogs.txt> regards, Veena -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/