what is semaphores error and how to fix that error

[shabbir5]

Hi All,

while running health report , we are getting below error 

semaphores default available[2]

semaphores default available[0]

how to fix this error?

Thank you,

Shabbir

[Mike_R]

Can you post screenshot of where you are seeing this error?

[Community Alums]

Hi @shabbir5 ,

A semaphore is used on the platform to limit the number of transactions that can occur on a node at one time in order to protect resources on the node. When a user submits a request, it is routed through a semaphore pool where it basically joins a queue. If there is a free semaphore in that pool, then the request will grab it and process. When the transaction is complete, the semaphore is released and is free to process other requests that are in the queue.

Learn more from here : https://www.servicenow.com/community/now-platform-blog/troubleshooting-stuck-default-semaphores/ba-p...

https://www.servicenow.com/community/developer-forum/semaphore-what-is-it/m-p/1792091