# Can't load postgresql driver

**URL:** <https://community.stardog.com/t/cant-load-postgresql-driver/1944>\
**Category:** Support\
**Created:** [September 27, 2019, 3:51pm UTC](https://community.stardog.com/t/cant-load-postgresql-driver/1944 "2019-09-27T15:51:23Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![zachary.whitley](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.stardog.com/zachary.whitley/32/94_2.png) [@zachary.whitley](https://community.stardog.com/u/zachary.whitley)\
**Post date:** [September 27, 2019, 3:51pm UTC](https://community.stardog.com/t/cant-load-postgresql-driver/1944/1 "2019-09-27T15:51:23Z")

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I'm trying to setup a virtual graph through Studio and I keep getting an exception that it's not able to load the driver. I have the driver in my STARDOG\_EXT directory. Just to check I shutdown stardog and copied it into STARDOG/server/dbms and restarted and still had the error. I didn't have any additional settings other than the minimal required in Studio.

```
SEVERE: Unable to create initial connections of pool.
java.sql.SQLException: Unable to load class: com.postgresql.Driver from ClassLoader:sun.misc.Launcher$AppClassLoader@22d8cfe0;ClassLoader:java.net.URLClassLoader@1d15ac51
	at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:283)
	at org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:203)
	at org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:738)
	at org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:670)
	at org.apache.tomcat.jdbc.pool.ConnectionPool.init(ConnectionPool.java:482)
	at org.apache.tomcat.jdbc.pool.ConnectionPool.<init>(ConnectionPool.java:154)
	at org.apache.tomcat.jdbc.pool.DataSourceProxy.pCreatePool(DataSourceProxy.java:118)
	at org.apache.tomcat.jdbc.pool.DataSourceProxy.createPool(DataSourceProxy.java:107)
	at org.apache.tomcat.jdbc.pool.DataSourceProxy.getConnection(DataSourceProxy.java:131)
	at com.complexible.stardog.virtual.vega.rdbms.RdbmsDataSource.lambda$connect$0(RdbmsDataSource.java:52)
	at com.complexible.stardog.virtual.vega.RuntimeDriverLoader.executeUnderClassLoader(RuntimeDriverLoader.java:124)
	at com.complexible.stardog.virtual.vega.rdbms.RdbmsDataSource.connect(RdbmsDataSource.java:50)
	at com.complexible.stardog.virtual.vega.rdbms.RdbmsVirtualGraphFactory.create(RdbmsVirtualGraphFactory.java:64)
	at com.complexible.stardog.virtual.vega.rdbms.RdbmsVirtualGraphFactory.create(RdbmsVirtualGraphFactory.java:48)
	at com.complexible.stardog.virtual.DefaultVirtualGraphRegistry.createVirtualGraph(DefaultVirtualGraphRegistry.java:349)
	at com.complexible.stardog.virtual.DefaultVirtualGraphRegistry.createVirtualGraph(DefaultVirtualGraphRegistry.java:335)
	at com.complexible.stardog.virtual.DefaultVirtualGraphRegistry.add(DefaultVirtualGraphRegistry.java:196)
	at com.complexible.stardog.virtual.SecuredVirtualGraphRegistry.add(SecuredVirtualGraphRegistry.java:146)
	at com.complexible.stardog.protocols.http.server.virtual.admin.VirtualGraphHttpService.addVG(VirtualGraphHttpService.java:391)
	at com.complexible.stardog.protocols.http.server.virtual.admin.VirtualGraphHttpService.add(VirtualGraphHttpService.java:193)
	at com.stardog.http.server.undertow.jaxrs.ExtractRoutes.lambda$handleIt$5(ExtractRoutes.java:192)
	at org.apache.shiro.subject.support.SubjectRunnable.doRun(SubjectRunnable.java:120)
	at org.apache.shiro.subject.support.SubjectRunnable.run(SubjectRunnable.java:108)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
```

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<div class="post-metadata">

**Author:** ![zachary.whitley](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.stardog.com/zachary.whitley/32/94_2.png) [@zachary.whitley](https://community.stardog.com/u/zachary.whitley)\
**Post date:** [September 27, 2019, 4:54pm UTC](https://community.stardog.com/t/cant-load-postgresql-driver/1944/2 "2019-09-27T16:54:06Z")

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I got it. It looks like it's a Studio problem. It defaults to com.postgresql.Driver and not the correct org.postgresql.Driver

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<div class="post-metadata">

**Author:** ![zachary.whitley](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.stardog.com/zachary.whitley/32/94_2.png) [@zachary.whitley](https://community.stardog.com/u/zachary.whitley)\
**Post date:** [October 11, 2019, 4:54pm UTC](https://community.stardog.com/t/cant-load-postgresql-driver/1944/3 "2019-10-11T16:54:07Z")

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