ORDS, SODA & JSON in the Database

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ORDS - Borrowed Connections, Available Connections, Maximum Connections

AndyPolNov 2 2018 — edited Nov 2 2018

I'm a bit confused... my APEX application (APEX 5.1, ORDS on Tomcat, ORACLE 11.2) time to time returns 503. IN catalina.out I found this error:
*** Error: Could not obtain a database connection because all connections in the pool: |apex|| were in use. Borrowed Connections: 44 Available Connections: 56 Maximum Connections: 100 ***

I can't understand this error, available is 56 so why it can't obtains connection ?

Regards

Andrzej

Added on Nov 2 2018

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