I have a Spring Boot application (version 1.5.1.RELEASE) and I am using spring-boot-starter-data-jpa as a dependency to manage my database. I am using postgres as my database and configured it using the below properties.
spring.datasource.url=${POSTGRES_URL}
spring.datasource.username=${POSTGRES_USER}
Now when I run my tests which are almost 120, I get too many client already open error for abou 10 test cases while starting the test case itself and it fails.(remaining 100 test cases pass with success as they are able to get a connection to database)
First thing I did is increased my default postgres max connections count from 100 to 200 in the postgres server config file and my tests pass successfully after this change.
Now I investigated a bit and tried setting the parameters for connection pooling properties such as :
spring.datasource.tomcat.max-active=200
spring.datasource.tomcat.test-on-borrow=true
spring.datasource.tomcat.max-wait=10000
However these properties do not work and the tests fails again giving the same error as above. I tried reading from multiple different blogs and spring documentation for setting the connection pool properties but did not find what might be going wrong with me.
I also think that if I set the above property spring.datasource.tomcat.max-active to 100 connections it should work with the help of tomcat jdbc pooling as i think in current scenario it is trying to open a new connection to database for each test case and I am in a fear that this same scenario might happen when I deploy this code to production environment and a new connection will be opened to the database for each request.
Does anyone have faced this problem before or is there something wrong I am doing.
Thanks in advance for the help.
Try upgrading Spring boot version, 1.5.10-RELEASE is the current version.
Also, I found the connection pool properties for my application were not being applied when the property prefix tomcat was included. If you are still having issues try removing that.
i.e.
spring.datasource.tomcat.max-active=200
Becomes
spring.datasource.max-active=200
See https://artofcode.wordpress.com/2017/10/19/spring-boot-configuration-for-tomcats-pooling-data-source
Related
I am learning Spring Boot using open-source projects and have stumbled upon their demo project — PetClinic. It has two possible databases configured: MySQL & HSQLDB, it uses the latter by default.
So I was able to launch the project look at it on localhost and can see that the DB (HSQLDB) is being populated but I was unable to set up a connection through the Intellij IDEA because the project does not specify the path that allows to see the contents of this in-memory DB.
Can anyone please tell me, what am I missing in the process of establishing the connection to HSQLDB here?
Thanks!
You can't connect to an in-memory instance of HSQLDB from another process.
The main drawback [of in-memory mode] is that it is not possible by default to connect to
the database from outside your application. As a result you cannot
check the contents of the database with external tools such as
Database Manager while your application is running.
If you want to do this, you need to run HSQL as a server. More details about how to run it in server mode can be found here.
I'm learning Spring boot and I'm trying to create a very simple RESTful API that access an in-memory database and perform CRUD actions.
However, everytime I try to Connect or Test Connection on http://localhost:8080/h2-console, I get this error:
"Database "C:/Users/XXX/test" not found, and IFEXISTS=true, so we cant auto-create it [90146-199] 90146/90146"
https://imgur.com/a/oYgkK1C
I followed EXACTLY the instructions from http://www.springboottutorial.com/spring-boot-crud-rest-service-with-jpa-hibernate. I have tried everything I could find online: using jdbc:h2:mem:test as JDBC URL etc, but none of them worked for me and I'm not sure what am I doing wrong.
I didn't install h2 database from the official website as I read it is not necessary to use the in-memory module (and I still don't know if I should've installed it or not, as there is not a single mention of it online, as far as I checked).
Any thoughts? I'm a beginner when it comes to Spring Boot and I'm really lost. I just want to test CRUD actions and I don't care about the persistence of the DB.
I have provided my application.properties below.
Thank you! :)
# H2
spring.h2.console.enabled=true
spring.h2.console.path=/h2
# Datasource
spring.datasource.url=jdbc:h2:mem:test
spring.datasource.username=user
spring.datasource.password=user
spring.datasource.driver-class-name=org.h2.Driver
Make sure your url in h2-console(refer screenshot below) is same as your 'spring.datasource.url=jdbc:h2:mem:test'.
It worked for me.
UPDATE: Other alternative solution is,
you can avoid setting spring.datasource.url property. Spring will automatically set this default JDBC url for you.
happy learning.. Upvote, if it is sovled your issue.
In your spring application.properties file, set the property
spring.datasource.url=jdbc:h2:~/test
Then restart the application and open http://localhost:8080/h2-console/
Click on Test Connection button, you should see "Test successful".
I have coded a Spring Boot based web application, which is expected to be run in WildFly server. The applications runs great, but the issue is with testing.
I have the database connections, caching and transaction management dealt by the server. Now, I need to be able to test them. While I was able to get through database connection problem through a mock JNDI connection and the transaction management, I'm not sure how to deal with testing of the caching.
One solution is to use Arquillian project. But, either this project is unable to recognize Spring Boot/ I'm doing something wrong, which is causing me pain to test the application.
Can someone please suggest on solving the issue? Below are my hibernate specific properties
spring.jpa.hibernate.naming_strategy=org.hibernate.cfg.EJB3NamingStrategy
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.SQLServer2008Dialect
spring.jpa.properties.hibernate.cache.region.factory_class=org.jboss.as.jpa.hibernate4.infinispan.InfinispanRegionFactory
spring.jpa.properties.hibernate.cache.infinispan.cachemanager=java:jboss/infinispan/container/hibernate
spring.jpa.properties.hibernate.transaction.manager_lookup_class=org.hibernate.transaction.JBossTransactionManagerLookup
spring.jpa.properties.hibernate.cache.use_second_level_cache=true
spring.jpa.properties.hibernate.show_sql=false
spring.jpa.properties.hibernate.cache.use_query_cache=false
spring.jpa.properties.hibernate.hbm2ddl.auto=none
spring.jpa.properties.hibernate.generate_statistics=true
spring.jpa.properties.hibernate.cache.infinispan.statistics=true
spring.jpa.properties.hibernate.search.default.directory_provider=infinispan
spring.jpa.properties.hibernate.search.infinispan.cachemanager_jndiname=java:jboss/infinispan/container/hibernate
I would suggest creating a separate configuration for tests. This configuration would contain a definition of a TransactionManager bean - here is an example from other post. The next step is to provide your own implementation of TransactionManagerLookup and applying it to Transport configuration - as described in the manual.
I am trying to setup a struts project locally. One way I know to set up JDBC settings as to go to administrative console of websphere and create JDBC provider and JNDI and all. But is there any other way to do in the code itself?
There is some resource reference in web.xml. I am totally new to struts.Please help.
DataSourceAlias
javaxsql.Data...... etc etc
If you configured for WAS 6.1and configuration is good you need to stop and start nodeAgents for the changes to get propagated and test the jdbc connection after restarting.....if it was WAS 8 they will be propagated automatically that means you configured improperly
I am trying to create a connection pool for a db2 database in glassfish and I'm somewhat new to the entire process. I created the pool yesterday with no problems, I pinged the server successfully and all was well. The next time I start glassfish, my connection pool is gone! After recreating the connection pool with the same settings, the ping is failing with the following error in the server.log:
RAR5099 : Wrong class name or classpath for Datasource Object java.lang.ClassNotFoundException: com.ibm.db2.jcc.DB2ConnectionPoolDataSource
I've tried moving the db2 driver .jar files around to lib/ or lib/ext/ and I've played around with the classpath prefixes and suffixes, but I've had no luck. It seems like glassfish isn't finding the drivers but I can't understand why.
BTW: I'm using OS X 10.6 and I configured the connection pool in a pretty basic way. I also added driverType = 4 to the properties.
Thanks in advance for your help!
You need to have the files db2jcc.jar and db2jcc_license_cu.jar in your classpath. The mentioned lib/ext/ should probably do the trick. The correct classname is probably com.ibm.db2.jcc.DB2SimpleDataSource for use with GlassFish.