Hello Igniters, we have an issue in master branch and in the upcoming 2.8 release that related to new metrics functionality implemented in [1]. You can't use new "configureHistogramMetric" and "configureHitRateMetric" configuration methods on caches with long names. My estimation shows that cache with 30 characters in its name will shut down your whole cluster with failure handler if you try to change metrics configuration for it using one of those methods.
Initially we wanted to merge [2] to show a valid error message instead of failing the cluster, but it wasn't in plans for 2.8 because we didn't know that it clashes with [1]. I created issue [3] with plans of removing MetaStorage key length limitations, but it requires some thoughtful MetaStorageTree reworkings. I mean that it can't be done in only a few days. What do you think? Does this issue affect 2.8 release? AFAIK new metrics are experimental and they can have some known issues. Feel free to ask me for more details if it's needed. [1] https://issues.apache.org/jira/browse/IGNITE-11987 [2] https://issues.apache.org/jira/browse/IGNITE-12721 [3] https://issues.apache.org/jira/browse/IGNITE-12726 -- Sincerely yours, Ivan Bessonov
