@HemantM31  please can you check previous forum questions for solutions?

Queue processor issue- items are stuck at schedule task list

Agile Studio queue processor pyFTSIncrementalIndexer is not processing scheduled processes

Please could you go through the following support document?

pyFTSIncrementalIndexer not running or turning off automatically

The main documentation can be found here:

Managing queue processors

Queue processor FAQ

From the FAQ:

Why is my new queue processor not working?

If your queue processor does not work, consider the following:

• Queue processor rules rely on the DSM service. In Pega Cloud services and client-managed cloud environments, a stream node is automatically configured and ready to use. For on-premises environments, ensure that you define at least one node in a cluster to be a Stream node using the setting: -DNodeType=Stream. For more information, see Stream node configurations for a queue processor rule.
• One problem may be that Pega Platform is not be able to properly resolve your queue processor rule. For more information on how queue processor rules work, see System Runtime Context and General system settings.
• If further troubleshooting is necessary, see Troubleshooting background processing.

There is also a good Pega Academy course: Background process management