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https://issues.apache.org/jira/browse/IGNITE-12844?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Philipp Masharov updated IGNITE-12844:
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Release Note: A log message on how to avoid discovery blocking because of
too many cache metrics was added.
> 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
> Priority: Major
> 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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