On Tue, 12 Aug 2025 04:41:51 GMT, Jaikiran Pai <j...@openjdk.org> wrote:
>>> Hi @jaikiran, Thanks for your response. Any chance this could be included >>> in Java 21 LTS in the future? >> >> Backports to OpenJDK are managed by a separate "jdk-updates" project >> https://openjdk.org/projects/jdk-updates/. Members of that project decide >> which changes should be backported (and when). >> >> For this specific change, Java 26 release isn't scheduled for this year. >> Once it is released and after that version sees usage in real world >> applications, only then enhancements like these are usually considered for >> backports. So it's too early to say if/when this change will be backported. >> >> In the meantime, what would be good is if you suspect that the backlog limit >> is indeed causing this issue on your setup, you could try to use the 26 >> early access build which is available here https://jdk.java.net/26/ and see >> if that helps you get past this issue. Are you creating a ServerSocket (or >> some other construct?) with some explicit value for backlog that is greater >> than 200? > >> Hi @jaikiran, I am running Apache Tomcat on Java. Tomcat has an acceptCount >> set to a large number (greater than 200). I believe Tomcat creates a >> ServerSocket with the configured acceptCount, and I suspect that it is not >> effective on Windows for the reasons mentioned above in this trail. > > Thank you for that detail, that's useful to know. Based on what you note and > what's documented of that Connector attribute in Tomcat docs - > https://tomcat.apache.org/tomcat-9.0-doc/config/http.html#Attributes_Standard%20Implementation_acceptCount, > I think what you are suggesting is correct - the backlog might be playing a > role here. > > If you get a chance to try this with Java 26 early access build, that would > be a good experiment to verify that this change does indeed help this use > case (I'll be curious to hear how that test goes). Hi @jaikiran - I have tested with the Java 26 early access build and can report that the issue i faced on Windows OS with TCP/HTTP connection refused errors even at relatively low concurrency has been resolved in this build. Thanks. ------------- PR Comment: https://git.openjdk.org/jdk/pull/25819#issuecomment-3179832921
