[ZEPPELIN-3688] Cannot inject a customized JDBC interpreter in ZEPPELIN

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 0.8.0
• Fix Version/s: 0.9.0
• Component/s: Interpreters
• Assignee: Unassigned
• Reporter: zhaoxianwei
• Created: 07/Aug/18 15:43
• Updated: 23/Jan/19 02:39

Description

when I try to register a customized JDBC interpreter whose jdbc driver comes from Huawei Data Lake Insight (DLI) service , and add all the connection configurations it needed, it seems that it doesn't work. The  connection configurations cannot be passed to the DLI driver.

I did it according to the instructions of the official website(http://zeppelin.apache.org/docs/0.8.0/interpreter/jdbc.html)，the only difference is that  i copied the jdbc jar to the interpreter classpath instead of using a public maven coordinate when did Dependency Setting . 

The appendix is the specific message of error 

I just compared the error message between DLI driver and postgresql driver, and read the jdbc interpreter source code from zeppelin, it seems that the right process is to load a dbcp pool driver first, and then the dbcp pool driver is delegated to load the real jdbc driver （the postgresql's call stack can explain this）, however , when using DLI driver, zeppelin directly loaded the DLI driver instead of loading dbcp pool first resulting in the connection configurations not being passed to the DLI driver.