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Question: In YARN scheduler, even if no apps running, it shows some no. in Num Schedulable Applications as 356 or 354 or 50 (varies)

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Question: In YARN scheduler, even if no apps running, it shows some no. in Num Schedulable Applications as 356 or 354 or 50 (varies)

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Even if no apps running in YARN, it shows some no. in Num Schedulable Applications as 356 or 354

Amabri Version 2.5.2.0 HDP 2.3.4.0

Queue State:RUNNING
Used Capacity:0.0%
Configured Capacity:25.0%
Configured Max Capacity:100.0%
Absolute Used Capacity:0.0%
Absolute Configured Capacity:25.0%
Absolute Configured Max Capacity:100.0%
Used Resources:<memory:0, vCores:0>
Num Schedulable Applications:356
Num Non-Schedulable Applications:0
Num Containers:0
Max Applications:500
Max Applications Per User:2000
Max Application Master Resources:<memory:344064, vCores:1>
Used Application Master Resources:<memory:98304, vCores:24>
Max Application Master Resources Per User:<memory:348160, vCores:1>
Configured Minimum User Limit Percent:100%
Configured User Limit Factor:4.0
Accessible Node Labels:*
Ordering Policy:FairOrderingPolicy with sizeBasedWeight
Preemption:enabled
<br>
Num Schedulable Applications:? 
How this value is calculated ?

Any pointers will be helpful.