Hey @Kirankumarbs , I did some quick research and found some helpful information. 

The -1 in the Executors tab is a Spark sentinel for "unknown / not available." The executor itself is active — that "Active(1)" label is accurate — but Spark doesn't have a current value for the active tasks metric, so it falls back to -1. The UI renders that directly, hence the flat line.

Nothing is wrong with the job. Check the Jobs and Stages tabs for real task activity.

Hope this helps, Louis.