I have the following simple timeout workflow and running it, with no luck actually killing the job.

Started by user Tilander, Jim
[Pipeline] Allocate node : Start
Running on CT-COMPASS-W63-15f9431a in c:\jenkins\small\workspace\pipeline-testbed
[Pipeline] node {
[Pipeline] stage (Stage 1)
Entering stage Stage 1
Proceeding
[Pipeline] Enforce time limit : Start
[Pipeline] timeout {
[Pipeline] bat
[pipeline-testbed] Running batch script

c:\jenkins\small\workspace\pipeline-testbed>ping -t 8.8.8.8

Pinging 8.8.8.8 with 32 bytes of data:
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Sending interrupt signal to process
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53
Reply from 8.8.8.8: bytes=32 time=1ms TTL=53

I'm running on Windows Server 2012R2, with the Swarm client:

http://repo.jenkins-ci.org/releases/org/jenkins-ci/plugins/swarm-client/2.0/

This is the script:

node {
stage 'Stage 1'
timeout(time: 13, unit: 'SECONDS')

stage 'Stage 2'
echo 'Hello World 2'
}