Hi, IIUC, when a distributed job is started, Yarn first obtains a delegation token from the target resource, then securely pushes the delegation token to the individual tasks. If the job lasts longer than a given period of time, then Yarn renews the delegation token (or more precisely, extends its lifetime), therefore allowing the tasks to continue using the delegation token. This is based on the assumption that the delegation token itself is static and doesn't change (only its lifetime can be extended on the target resource's server).
I'm building a custom service where I'd like to share new information with the tasks once the delegation token has been renewed. Is there a way to let Yarn push new information to the running tasks right after renewing the token? Thanks, Julien
