I am using the databricks JDBC driver (https://databricks.com/spark/jdbc-drivers-download) to connect to Azure databricks.

The connection needs to be routed through a HTTP proxy. I found parameters that can be configured for using the HTTP proxy:By passing invalid parameters I found that the parameters are parsed by the driver.

Still I see the error:

java.sql.SQLException: [Databricks][DatabricksJDBCDriver](700120) Host ....azuredatabricks.net cannot be resolved through DnsResolver com.databricks.client.jdbc.rpc.InternalDnsResolver. Error Message: No such host is known (....azuredatabricks.net)
       at com.databricks.client.jdbc.rpc.CustomDnsResolverLoader.getResolvedHost(Unknown Source)
       at com.databricks.client.hivecommon.api.HiveServer2ClientFactory.createTransport(Unknown Source)
       at com.databricks.client.spark.jdbc.DownloadableFetchClientFactory.createClient(Unknown Source)
       at com.databricks.client.hivecommon.core.HiveJDBCCommonConnection.connectToServer(Unknown Source)
       at com.databricks.client.spark.core.SparkJDBCConnection.connectToServer(Unknown Source)
       at com.databricks.client.hivecommon.core.HiveJDBCCommonConnection.establishConnection(Unknown Source)
       at com.databricks.client.spark.core.SparkJDBCConnection.establishConnection(Unknown Source)
       at com.databricks.client.jdbc.core.LoginTimeoutConnection.connect(Unknown Source)
       at com.databricks.client.jdbc.common.BaseConnectionFactory.doConnect(Unknown Source)
       at com.databricks.client.jdbc.common.AbstractDriver.connect(Unknown Source)
       at org.apache.commons.dbcp2.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:55)
       at org.apache.commons.dbcp2.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:355)
       at org.apache.commons.dbcp2.BasicDataSource.validateConnectionFactory(BasicDataSource.java:115)
       at org.apache.commons.dbcp2.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:665)
       at org.apache.commons.dbcp2.BasicDataSource.createDataSource(BasicDataSource.java:544)
       at org.apache.commons.dbcp2.BasicDataSource.getConnection(BasicDataSource.java:753)
       at cloud.celonis.connector.jdbc.services.DatabaseConnectionService.lambda$getConnection$0(DatabaseConnectionService.java:47)
       at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
       at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
       at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)

So, it seems that the proxy is not used after all.

Do you have any suggestions, what to check and how to make the driver use the proxy? Thank you!