On 12/15/20 1:35 PM, Beard, Shawn wrote:
No intitialSize is not defined.
Im getting the data to verify from JMX, however we also have an APM called
appdynamics loaded. Both verified the 8 max connections.
Other tomcat servers with exact same jdbc connection pool config(only
difference is servername, databasename, user and pass) show 50 max connections,
which is what maxActive is set to.
Are the other tomcat servers running the same tomcat version? Since TC8,
the default connection pool is DBCP2 which uses maxTotal in place of
maxActive. See [1]. If you are running 8+, s/maxActive/maxTotal in the
config should work.
Phil
[1] https://tomcat.apache.org/migration-8.html#Database_Connection_Pooling
Shawn Beard
Sr. Systems Engineer |
BTS
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-----Original Message-----
From: Johnson, Jim <[email protected]>
Sent: Tuesday, December 15, 2020 2:22 PM
To: Tomcat Users List <[email protected]>
Subject: RE: jdbc connction pool issues [EXTERNAL]
** CAUTION: External message
Hi Shawn,
No, I don't think that maxActive means that it's defining the maximum number of
connections for the pool, I think it's strictly referring to the "[ .. ] maximum
number of *active connections* that can be allocated from this pool at the same time. [
.. ]" (emphasis mine on active connections)
Here is the doc that I've been referring to - sorry for not linking it earlier:
https://urldefense.com/v3/__https://tomcat.apache.org/tomcat-9.0-doc/jdbc-pool.html__;!!Li8W9_Um1Taa!vJGrxr7yc86joO5r6QoNstpipfempGFqrYRe3_NyAIGNs-LenmBWhtjn1fRiAOex$
On those other Tomcat servers is there a initialSize defined?
Jim
-----Original Message-----
From: Beard, Shawn <[email protected]>
Sent: Tuesday, December 15, 2020 2:49 PM
To: Tomcat Users List <[email protected]>
Subject: RE: jdbc connction pool issues [EXTERNAL]
But wouldn’t maxActive mean the connection pool has a max of 50 conenctions? On
other tomcat servers I have, maxActive is set to 50 and I verified im jmx that
there are 50 max connections on the connection pool.
Here though I checked jmx, sure enough, its max connections is 8.
Shawn Beard
Sr. Systems Engineer |
BTS
Middleware Engineering | +1-515-564-2528<tel:+1-515-564-2528> |
[email protected]<mailto:[email protected]>
-----Original Message-----
From: Johnson, Jim <[email protected]>
Sent: Tuesday, December 15, 2020 1:35 PM
To: Tomcat Users List <[email protected]>
Subject: RE: jdbc connction pool issues [EXTERNAL]
** CAUTION: External message
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 <[email protected]>
Sent: Tuesday, December 15, 2020 2:12 PM
To: Tomcat Users List <[email protected]>
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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Phone: +1-515-564-2528
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Beard
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