![]() ![]() Please let me know if I am wrong with anything.This method calls close() and start() in sequence within synchronized scope so anyĬonnection requests that come in while the datasource is shutting down will be served by the new pool. These have to be considered if you want to use Tomcat JDBC Pool. It is now very simple!įYI, below are the examples of validation parameters. There is no need to add factory attribute in the context.xml, or complex validation parameters. Pega 8.4 installation guide fixed these issues and now it is based on DBCP 2 (2.x). Tomcat JDBC Pool uses "maxActive" and "maxWait". Also, "maxTotal" and "maxWaitMillis" were mistakenly used. If Tomcat JDBC Pool is used, which is okay, but then you always need to consider adding a set of validation parameters, which were not included in the guide. Only Pega 8.3 installation guide instructs to use Tomcat JDBC Pool and it caused confusion. ![]() "maxActive", and "maxWait" can't be used. New parameter, "maxTotal" and "maxWaitMillis" are used. This is the default from Tomcat 8, so it is available without adding factory attribute or anything as long as you install Tomcat 8. Commons DBCP 2 (2.x) is upgraded from Commons DBCP (1.x). To avoid this, you'll have to add a set of validation parameters such as "testOnBorrow" or "validationQuery" (see the end of this post).ģ. That means if the connection is already stale and invalid, it fails. What is problematic in Tomcat JDBC Pool is, it does NOT validate the connection in the pool by default. As for parameter, "maxActive", "maxIdle", and "maxWait" are used just like old DBCP. "maxTotal" and "maxWaitMillis" can't be used. This has been included in its binary since Tomcat 7.0.19 but never be used unless you add factory=“.pool.DataSourceFactory” in the context.xml. Tomcat JDBC Pool is developed by Tomcat project and meant to be an alternative for Commons DBCP. "maxTotal" and "maxWaitMillis" can't be used.Ģ. As for parameter, "maxActive", "maxIdle", and "maxWait" are used. It is single threaded and performance is slow. Commons DBCP (1.x) is developed by Apache Commons project. Included from 7.0.19 but not used unless you explicitly specify it Once again, let me summarize to the best of my knowledge: JDBC Connection Pool No Tomcat JDBC Pool still uses "maxActive" and "maxWait" just like old DBCP (1.x). "maxTotal" and "maxWaitMillis" are meant for DBCP 2. "Tomcat JDBC Pool uses "maxTotal" instead of "maxActive" to limit the number of connections." Tomcat 8+ uses DBCP2 ( (DBCP_2)_Configurations)Ģ. "Tomcat has updated its default connection pooling library to Tomcat JDBC Pool ("tomcat-jdbc-pool") in Tomcat 8." ***Edited by Moderator: Lochan to update SR details*** Let me know if my suggestion makes sense or not. It will be better to write some explanation of the importance of factory attribute in Tomcat 8x or people may just copy old settings from prior version environment and forget it. I am suspecting that this confusion may even cause another severe error ( ). Currently 7.4 installation guide talks about only maxActive instead of maxTotal, and 8.3 guide does not state the importance of factory attribute - I have already seen a couple of customers misusing incorrect parameters. The guide should state above as a note because it is pretty important (if you misuse wrong parameters, for example misusing maxActive in Tomcat 8, then your setting will be ignored). Is my understanding above correct? If yes, here is my proposal to installation guide creation team:
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