Pavel, We already can monitor the state of individual nodes and show it through metrics. Now I'd like to see how to go further and automate a decision on if a node should be kicked off from the cluster or not.
-- Denis On Mon, Jul 2, 2018 at 12:28 PM Pavel Kovalenko <jokse...@gmail.com> wrote: > Denis, > > I think, JVM can't easily help to itself if it's in SW pause. Most > solutions what I saw about handling such situations are checking heartbeats > on other nodes or run in parallel supervisor process which can detect that > JVM with Ignite in SW. > > 2018-07-02 20:54 GMT+03:00 Denis Magda <dma...@apache.org>: > > > Igniters, > > > > Pulling this discussion up. Any thoughts? > > > > -- > > Denis > > > > On Thu, Jun 21, 2018 at 3:52 PM Denis Magda <dma...@apache.org> wrote: > > > > > Igniters, > > > > > > It's a pleasure to see how our project is evolving in a directing of > > being > > > a self-healing solution: > > > > > > - Ignite can already handle critical failures such as OOM, File I/O > > > issues, etc. [1] > > > - There is an endeavor to fix cluster lock-ins due to partition map > > > exchange issues. [2] > > > > > > There is one more notorious problem that might affect Ignite > deployments > > > which is long stop-the-world GC pauses. > > > > > > I know we did a little progress in this direction [3] by providing > > > particular metrics that help to monitor the pauses. Why don't we keep > the > > > pace and teach Ignite to help itself if it sees there is a node that > > brings > > > down overall cluster performance due to an STP? > > > > > > I would create policies similar to the critical failures policies [4] > or > > > just add a long STP to the list of critical failures and reuse existing > > > functionality. > > > > > > Thoughts? Anyone who'd like to implement the feature? > > > > > > [1] https://apacheignite.readme.io/docs/critical-failures-handling > > > [2] > > > http://apache-ignite-developers.2346864.n4.nabble. > > com/IEP-25-Partition-Map-Exchange-hangs-resolving-td31819.html > > > [3] https://issues.apache.org/jira/browse/IGNITE-6171 > > > [4] > > > https://apacheignite.readme.io/docs/critical-failures- > > handling#section-failure-handling > > > > > >
