Tomcat docs for minIdle reads this: https://tomcat.apache.org/tomcat-8.5-doc/jdbc-pool.html
minIdle (int) The minimum number of established connections that should be kept in the pool at all times. The connection pool can shrink below this number if validation queries fail. Default value is derived from initialSize:10 (also see testWhileIdle) Setting this to a DS an starting the pool: ds.setInitialSize(1); ds.setMaxIdle(1) ds.setMaxActive(10); results in: WARN org.apache.tomcat.jdbc.pool.ConnectionPool [JuliLog.java:137] - maxIdle is smaller than minIdle, setting maxIdle to: 10 If minIdle would be retrieved from initialSize it is not smaller - seems like a Bug. Do you agree? Should i open a bug report for that?
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