Hi Michael
Could you please try the latest 1.8, 11, and 17 JDKs and see if the issue is consistently reproducible across all versions or is specific to some. Oleg --- INFO] Tests run: 12, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 5.085 s - in org.apache.hc.client5.testing.async.TestH2Reactive [INFO] Running org.apache.hc.client5.testing.async.TestH2AsyncRedirect Exception in thread "httpclient-main-1" java.lang.OutOfMemoryError: unable to create new native thread at java.lang.Thread.start0(Native Method) at java.lang.Thread.start(Thread.java:719) at java.util.concurrent.ThreadPoolExecutor.addWorker(ThreadPoolExecutor.ja va:957) at java.util.concurrent.ThreadPoolExecutor.processWorkerExit(ThreadPoolExe cutor.java:1025) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.ja va:1167) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.j ava:624) at java.lang.Thread.run(Thread.java:750) ^C[WARNING] ForkStarter IOException: Stream Closed. See the dump file /var/osipovmi/Projekte/httpcomponents-client/httpclient5- testing/target/surefire-reports/2022-05-18T14-30-26_663- jvmRun1.dumpstream --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@hc.apache.org For additional commands, e-mail: dev-h...@hc.apache.org