The following test timed out in the JDK26 CI:

java/text/Format/NumberFormat/NumberRoundTrip.java

Here's a snippet from the log file:

#section:junit
----------messages:(11/340)----------
command: junit NumberRoundTrip
reason: User specified action: run junit NumberRoundTrip
started: Thu Sep 18 12:42:39 UTC 2025
Mode: agentvm
Agent id: 31
Process id: 41008
Timeout signalled after 120 seconds
Timeout information:
--- Timeout information end.
finished: Thu Sep 18 12:50:43 UTC 2025
elapsed time (seconds): 484.435
----------configuration:(12/1167)*----------

<snip>

0.0 Double F> 0% P> 0 Long F> 0%
  -8.455264612427013E-101 F> -0,000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008455264612427014%
  -0,000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008455264612427014% P> -8.455264612427013E-101
  -8.455264612427013E-101 F> -0,000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008455264612427014%
-8.455264612427013E-101 Double F> -0,000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008455264612427014% P> -8.455264612427013E-101 Double F> -0,000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008455264612427014%
Numeric error 0.0 to 1.7344467606087662E-16
result: Error. "junit" action timed out with a timeout of 120 seconds on agent 31

This timeout is likely caused by this fix:

JDK-8260555 Change the default TIMEOUT_FACTOR from 4 to 1