Thanks John! I’m going to try my hand at HikariCP. Are there any examples anywhere on how to configure Cayenne to use a third party connection pool?
Cheers, - hugi > On 7. mar. 2016, at 20:39, John Huss <[email protected]> wrote: > > EOF can do JNDI, but that's not going to do anything to fix your problem. > > The connection pool in cayenne had some changes somewhat recently so it's > entirely possible there are bugs. > > In practice it turns out many people don't use the connection pool built-in > to Cayenne at all, and rather use a third-party connection pool, of which > there are several. The cayenne one is decent, but it is very limited in > functionality and less robust due to having a smaller user base and being a > non-core feature. > > You can use another pool like: > hikari <https://github.com/brettwooldridge/HikariCP> - If I was starting a > new project I'd use this > tomcat-jdbc <https://tomcat.apache.org/tomcat-7.0-doc/jdbc-pool.html> - > This is what I currently use > commonds-dbcp <https://commons.apache.org/proper/commons-dbcp/> > c3po <http://www.mchange.com/projects/c3p0/> > > The main reason I turned to a third-party connection pool was to get > fair-scheduling which will provide connections to whoever has been waiting > the longest, which helps avoid unnecessary errors caused by serving > requests out of order. > > John > > On Mon, Mar 7, 2016 at 2:31 PM Michael Gentry <[email protected]> wrote: > >> Well, I'm not sure what you are using to run your web application, but >> Tomcat, Jetty, JBoss, etc all have mechanisms to provide JNDI lookups of DB >> connection pools. You just tell Cayenne Modeler to use JNDI lookup and >> give it the JNDI name, then configure the container to provide the DB >> connection. >> >> Is your WO application using EOF or Cayenne? Been a while since I used WO, >> but I'd be stunned if EOF cannot use a JNDI lookup as well. >> >> mrg >> >> >> On Mon, Mar 7, 2016 at 3:07 PM, Hugi Thordarson <[email protected]> wrote: >> >>> Hi Michael, >>> does using JNDI change anything about the connection itself, isn’t it >> just >>> a different method of looking up connection information? >>> >>> But I probably can’t use it anyway since one of the apps is a WebObjects >>> app and doesn’t provide a JNDI service (at least I’ve never used it). >>> >>> Thanks, >>> - hugi >>> >>> >>>> On 7. mar. 2016, at 19:13, Michael Gentry <[email protected]> >> wrote: >>>> >>>> Hi Hugi, >>>> >>>> Since this appears to be a web-based application, can you switch to >> using >>>> JNDI? >>>> >>>> mrg >>>> >>>> >>>> On Mon, Mar 7, 2016 at 5:46 AM, Hugi Thordarson <[email protected]> >>> wrote: >>>> >>>>> Hi all, >>>>> This is still happening, even after I added a validationQuery, our app >>> is >>>>> dying quite frequently :(. I’m not quite sure how to debug this, is >>> there >>>>> any way for me to catch where connections are being opened in the code >>> and >>>>> at what location they’re hanging? >>>>> >>>>> >>>>> >>> >> https://www.dropbox.com/s/8jkmh6513s6wwkn/Screenshot%202016-03-07%2010.21.53.png?dl=0 >>>>> >>>>> Cheer, >>>>> - hugi >>>>> >>>>> // Hugi Thordarson >>>>> // http://www.loftfar.is/ >>>>> // s. 895-6688 >>>>> >>>>> >>>>> >>>>>> On 29. feb. 2016, at 11:25, Andrus Adamchik <[email protected]> >>>>> wrote: >>>>>> >>>>>> >>>>>>> On Feb 29, 2016, at 2:20 PM, Hugi Thordarson <[email protected]> >>> wrote: >>>>>>> >>>>>>> What does validationQuery do? >>>>>> >>>>>> Periodically executes for each pooled connection, and kills >> connections >>>>> that throw during validation. So it ensures that all pooled >> connections >>> are >>>>> in a good state. >>>>>> >>>>>> Andrus >>>>>> >>>>> >>>>> >>> >>> >>
