8367026: Reorder the timeout failure handler commands to have jstack run before the rest

Reviewed-by: erikj, lmesnik

test/failure_handler/src/share/conf/common.properties

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2015, 2024, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2015, 2025, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -27,7 +27,13 @@ args=%p
 ################################################################################
 # process info to gather
 ################################################################################
+# It's important to retain the order of these actions and run the thread dump
+# generating commands before the rest, to allow for capturing the test
+# process' call stack as soon as the timeout has occurred. That reduces the chances
+# of the test completing and thus missing crucial details from the thread dump
+# while these timeout actions were being run.
 onTimeout=\
+  thread_dump \
   jinfo \
   jcmd.compiler.codecache jcmd.compiler.codelist \
         jcmd.compiler.queue \
@@ -63,9 +69,13 @@ jcmd.thread.dump_to_file.params.successArtifacts=JavaThread.dump.%p.%iterCount
 
 jcmd.thread.vthread_scheduler.args=%p Thread.vthread_scheduler
 
+# use jstack to generate one thread dump
+thread_dump.app=jstack
+thread_dump.args=-e -l %p
+
 jstack.app=jstack
 jstack.args=-e -l %p
-jstack.params.repeat=6
+jstack.params.repeat=5
 
 jhsdb.app=jhsdb
 jhsdb.jstack.live.default.args=jstack --pid %p