Hi Shawn,

I think you’re missing initialSize

initialSize
(int)The initial number of connections that are created when the pool is 
started. Default value is 10

maxActive
(int) The maximum number of active connections that can be allocated from this 
pool at the same time. The default value is 100

It would make sense that 8 connections would be 80% utilized.

I would try replacing maxActive with initialSize and seeing how that works for 
you.

Good luck!

- Jim

From: Beard, Shawn <sbe...@wrberkley.com.INVALID>
Sent: Tuesday, December 15, 2020 2:12 PM
To: Tomcat Users List <users@tomcat.apache.org>
Subject: jdbc connction pool issues

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We have this jdbc connection pool set up:

<Resource name="jdbc/DataSource" auth="Container" type="javax.sql.DataSource"
driverClassName="com.microsoft.sqlserver.jdbc.SQLServerDriver"
url="jdbc:sqlserver://hostname:1433;selectMethod=direct;databaseName=databasename;sendStringParametersAsUnicode=false"
username="XXX" password="XXXXXX" maxIdle="20" minIdle="10" maxActive="50"
maxWait="30000" testWhileIdle="true" testOnBorrow="true" 
validationQuery="SELECT 1"/>

However we are getting this error:
Resource Pool Limit Reached
Time     12/15/20 11:48:00 AM
Summary
JDBC Connection Pool 
Catalina:class=javax.sql.DataSource,context=/XX,host=XXXXXXXXX,name="jdbc/DataSource",type=DataSource
 has reached 80% limit. Current pool size [8, Max pool size [8]

Shouldn’t the max connections of the connection pool be 50 since maxActive is 
50?



Shawn Beard • Sr. Systems Engineer
Middleware Engineering

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Beard
Sr. Systems Engineer
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BTS
Middleware Engineering
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+1-515-564-2528<tel:+1-515-564-2528>
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