Jenkins is reserved for jobs with matching label expression

jenkins

Solution 1:

I could prevent this error and continue the build by assigning a slave node with a label. I have done this by editing the pipeline and assigning label for agent option.

EDIT

When I further checked settings section, I could notice that, Amazon EC2 Plugin is installed in this Jenkins instance and all the clouds available are using this configuration.

Usage : Only build jobs with label expressions matching this node

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