Jenkins workspace cleanup thread

[padmasr...@googlemail.com]

I have a pipeline job(name: MyPipelineJob )..which is running for last 6days. 

Jenkins is checking for automatic workspace-cleanup process every day and my workspace was deleted even though my job was running at the time of deletion and then MyPipelineJob got aborted because of missing workspace excepiton.

This is my Workspace\ clean-up.log file content:

Started at Sat Mar 10 03:21:28 PST 2018

Checking job1

Checking job2

Checking job3

Checking job4

Checking MyPipelineJob

Finished at Sat Mar 10 03:21:38 PST 2018. 9386ms

Started at Sun Mar 11 04:21:28 PDT 2018

Checking job1

Checking job2

Checking job3

Checking job4

Checking MyPipelineJob

Deleting /.jenkins/workspace/MyPipelineJob on Jenkins

Finished at Sun Mar 11 04:21:38 PDT 2018. 9451ms

then I set hudson.model.WorkspaceCleanupThread.disabled=true , 

but still jenkins is checking for workspace cleanup..Any reason why jenkins deleted the pipeline job's workspace which was running at the time of deletion and how to avoid it?

Thanks,