Reconnect to Hazelcast cluster when network connection was interrupted

[arkadiuszdr]

Hazelcast 3.11.1 and Csharp client 3.11
We have .NET HazelcastClient which establish connection to Hazelcast cluster In some stage during application lifetime we switch off network connection. After approximately 20 seconds we got exception Hazelcast Instance is not active. Then we restore network connection but it does not solve problem. Each try to obtain any data from hazelcast results with the same exception message.
We try to set NetworkConfig parameters: ConnectionTimeout, ConnectionAttemptLimit, ConnectionAttemptPeriod but it does not change hazelcast behaviour. We also perform the same test with Java HazelcastClient with usage of ClientConnectionStrategyConfig and with this settings HazelcastClient was able to reconnect after lost of network connection.
Is there any way to solve that problem?

[jgardiner68]

The issue has been identified: when the network connection is down, the .net client is unable to resolve hostnames which generates an exception.

A workaround is to use IP addresses within the .net client config rather than hostnames but we will be issuing an updated .net client that resolves this issue.

Thank you for reporting it.

[aesergeev-tech]

@jgardiner68 could you please provide an estimation when new version with this fix will be available? thanks

[jgardiner68]

@asergeev95 the fix will be included in the next update of the .net client which is expected in the 2nd half of July

[rjso]

This has been causing some issues on our side of things as well with the exact same symptoms as @arkadiuszdr. Further to this I noticed that for the Java Client there is now a way to configure this settings: https://docs.hazelcast.org/docs/latest/manual/html-single/#configuring-client-connection-retry and I was wondering if we could use .xml alternative (as this feature is not listed at all in the supported ones list).

@jgardiner68 do you think your 2nd half of July is still valid? Would you require some help from my side?

[jgardiner68]

@rjso This is on schedule for a release by the end of July. I will update this ticket when it is available and will be great to get your feedback.

[Scooletz]

Will be shipped in 3.12.1