[GitHub] xiongshiyan opened a new issue #6079: multi datasource occurs 'connection holder is null'

[GitBox <gi...@apache.org>]

xiongshiyan opened a new issue #6079: multi datasource occurs 'connection holder is null'
URL: https://github.com/apache/incubator-druid/issues/6079
 
 
   it occurs a error 'connection holder is null' after waiting a lot of time, but it wouldn't occur in single datasource with the same configration.
   
   with the config:
   ````
   spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
   spring.datasource.initialSize=10
   spring.datasource.minIdle=20
   spring.datasource.maxActive=300
   spring.datasource.maxWait=30000
   spring.datasource.timeBetweenEvictionRunsMillis=30000
   spring.datasource.minEvictableIdleTimeMillis=30000
   spring.datasource.validationQuery=SELECT 1 FROM DUAL
   spring.datasource.testWhileIdle=true
   spring.datasource.testOnBorrow=true
   spring.datasource.testOnReturn=false
   spring.datasource.poolPreparedStatements=true
   spring.datasource.maxPoolPreparedStatementPerConnectionSize=20
   ```

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