[GitHub] [dolphinscheduler] jonwjh94 opened a new issue #7671: [Bug] [task-plugin-sql] hive/impala datasource can not get connection, throw NullpointerException

Mon, 27 Dec 2021 23:03:29 -0800 


jonwjh94 opened a new issue #7671:
URL: https://github.com/apache/dolphinscheduler/issues/7671


   ### Search before asking
   
   - [X] I had searched in the 
[issues](https://github.com/apache/dolphinscheduler/issues?q=is%3Aissue) and 
found no similar issues.
   
   
   ### What happened
   
   
![image](https://user-images.githubusercontent.com/38685000/147537710-ecea98b0-25d4-468f-958b-5d298c1f5241.png)
   
![image](https://user-images.githubusercontent.com/38685000/147537750-9a017819-d590-430d-b8f9-9c5d0fc47f6c.png)
   
使用JdbcDataSourceProvider.createOneSessionJdbcDataSource()方法hive/impala创建连接池设置了MaximumPoolSize=1，但是调度任务是，一般hive/impala都是多任务同时跑的话，会出现getConnection=null的情况，因此SqlTask.prepareStatementAndBind()方法会抛出空指针异常。
   
   
   
   
   ### What you expected to happen
   
   为什么hive/impala连接池需要创建容量为1的连接池？
   
   ### How to reproduce
   
   see what happened
   
   ### Anything else
   
   _No response_
   
   ### Version
   
   2.0.1
   
   ### Are you willing to submit PR?
   
   - [ ] Yes I am willing to submit a PR!
   
   ### Code of Conduct
   
   - [X] I agree to follow this project's [Code of 
Conduct](https://www.apache.org/foundation/policies/conduct)
   


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