Timeout: Pool empty. Unable to fetch a connection in 10 seconds, none available - madhusudana30/AlternativeJPAForWebSphere GitHub Wiki

org.apache.tomcat.jdbc.pool.PoolExhaustedException: [http-nio-9898-exec-1] Timeout: Pool empty. Unable to fetch a connection in 10 seconds, none available[size:5; busy:5; idle:0; lastwait:10000].

This exception occurs when the pool of connections are lesser than requested.

Solution: Increase the pool size, or increase the wait time.

Do not make many ajax calls at a time, if the pool connections are lesser and can't be changed.