[jira] [Created] (IGNITE-12844) Too many caches can block discovery

[Anton Vinogradov (Jira)]

Philipp Masharov created IGNITE-12844:
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             Summary: Too many caches can block discovery
                 Key: IGNITE-12844
                 URL: https://issues.apache.org/jira/browse/IGNITE-12844
             Project: Ignite
          Issue Type: Bug
            Reporter: Philipp Masharov
            Assignee: Philipp Masharov
             Fix For: 2.9


Several thousand caches send metrics in each discovery message.
Check implementation of `TcpDiscoveryMetricsUpdateMessage`
This behavior increases processing time and raises message size. As a result, the discovery worker is busy and the queue pool is growing.
We need to notify about the possible issue and print suggestion, for example, `-DIGNITE_DISCOVERY_DISABLE_CACHE=true` if it can help. Assumes to print WARN message once, for example, if TcpDiscoveryMetricsUpdateMessage consists of more than 500 CacheMetricsSnaphot instances.



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