Good day fellow Apache Tomcat users I have recently had reason to set a Postgres DataSource via the Tomcat JNDI api. My experiments have been largely unsuccessful, unfortunately I hope you are able to help me. I thank you in advance for taking the time to read this.
I am coming to this problem in a rather backward way. I am not familiar with deploying web applications through Tomcat, this is something that was done in a semi-automated way and replicated so that a close look has not really been necessary for me until now. To provide a bit of context, the web server where I am trying to set up a Postgres JNDI globally shared connection is running running several DSpace webapps. I have been largely assisted by the official documentation here [0] and here [1] as well as DSpace documentation here [2] and discussion on a user mailing list for DSpace here [3]. I am running: CentOS Linux release 7.8.2003 Tomcat 9.0.12 PostgreSQL 9.5.23 openjdk version "1.8.0_262" OpenJDK Runtime Environment (build 1.8.0_262-b10) 1. I downloaded postgresql-42.2.18.jar from https://jdbc.postgresql.org/download/postgresql-42.2.18.jar and placed it in /home/lib/dspace/apache-tomcat-9.0.12/lib 2. In /home/lib/dspace/apache-tomcat-9.0.12/conf/server.xml I added the following Resource <Resource name="jdbc/dspaceWeb" factory="org.apache.tomcat.jdbc.pool.DataSourceFactory" type="javax.sql.DataSource" auth="Container" username="*****" password="******" driverClassName="org.postgresql.Driver" url="jdbc:postgresql://localhost:5432/dspace" initialSize="5" maxTotal="50" maxIdle="15" minIdle="5" /> There are a couple of issues that confuse me: a) the official documentation about JNDI datasource examples [0] says "*This author has not had success here, although others have reported so. Clarification would be appreciated here." *in the section about Postgres. In other words, we can't be sure this works? b) in the official documtation about JDBC connection pool it says that if you want to define a JDBC connection pool in the Apache Container (which I understand to be trying to do) you have to specify the factory attribute and set the value to org.apache.tomcat.jdbc.pool.DataSourceFactory [1] This is not done in the example (that the author hasn't had success with?) in a) 3. Created a context.xml in /dspace/webapps/xmlui/META-INF/ <Context docBase="/dspace/webapps/xmlui"> <ResourceLink name="jdbc/dspace" global="jdbc/dspaceWeb" type="javax.sql.DataSource" /> </Context> When I start up Tomcat howere. I get this in the log: INFO [org.springframework.jndi.JndiObjectFactoryBean] JNDI lookup failed - returning specified default object instead: javax.naming.NameNotFoundException: Name [jdbc/dspace] is not bound in this Context. Unable to find [jdbc]. My understanding is that the webapp, DSpace, tried to look for a JNDI object in the namespace "jdbc/dspace" and barring that, falls back to instantiating it's own DataSource as a bean. See [4] But I don't understand why the above doesn't work. Thanks for your time Sources: [0] : https://tomcat.apache.org/tomcat-9.0-doc/jndi-datasource-examples-howto.html#PostgreSQL [1] : https://tomcat.apache.org/tomcat-9.0-doc/jdbc-pool.html#Inside_the_Apache_Tomcat_Container [2] : https://wiki.lyrasis.org/display/DSDOC6x/Installing+DSpace#InstallingDSpace-Externaldatabaseconnectionpool [3] : http://dspace.2283337.n4.nabble.com/Notes-on-PostgreSQL-connection-pooling-with-a-Tomcat-JNDI-resource-td4687149.html [4]: https://github.com/DSpace/DSpace/blob/dspace-6_x/dspace/config/spring/api/core-hibernate.xml
