hello Nikolay many thanks for the verification and the quick fix! Very appreciated.
Best regards, I.P. ---------- Původní e‑mail ---------- Od: Nikolay Izhikov <[email protected]> Komu: [email protected] Datum: 6. 10. 2026 15:59:30 Předmět: Re: Regression in Apache Ignite 2.18.0 "Hello. I.P Good catch! I confirm the regression. Will be fixed in the https://issues.apache.org/jira/browse/IGNITE-29109, shortly. пн, 5 окт. 2026 г. в 19:13, <[email protected]>: > > hi dev > > while working on some performance measurements in Ignite 2 and Ignite 3 it looks like that I potentially found some regression in 2.18.0 version versus 2.17.0. > It's about serialization of java.util.TreeMap and java.util.TreeSet (I didn't check another collection though). To save the time for writing a reproducer I used AI (claude code) to I'm attaching it here. Please, read README.md in the archive for low-level details - it has quite extensive information how to run it, possible issue description and a proposed solution. After some research, it might be connected to the IGNITE-26061 (commit 06a557b2e4) but I'm not very sure at the end... > > Could somebody please review it (such as I don't have any deep experience with Ignite's internals) that all is true and probably assist here what would be a next step in a resolution of the issue? > > Many thanks in advance! > > Best regards, > I.P. "
