[GitHub] [shardingsphere] chenqin091017 opened a new issue #11024: Springboot service can not start when the datatype of column is json

Sat, 26 Jun 2021 02:20:57 -0700 


chenqin091017 opened a new issue #11024:
URL: https://github.com/apache/shardingsphere/issues/11024


   
   ### Which version of ShardingSphere did you use?
   
   shardingsphere-jdbc-core 5.0.0-beta
   
   ### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
   
   ShardingSphere-JDBC
   
   ### Expected behavior
   
   springboot service can start
   
   ### Actual behavior
   
   springboot service can not start
   
   ### Reason analyze (If you can)
   When service start ,ShardingSphere will load some informations from mysql.
   Because the datatype of column is json and dataTypeMap don't have this 
key，throw NullPointerException.
   By the way，why does ShardingSphere load the information of other tables, 
don't use ShardingSphere ?
   ```java
   Caused by: java.lang.NullPointerException: null
        at 
org.apache.shardingsphere.infra.metadata.schema.builder.loader.dialect.MySQLTableMetaDataLoader.loadColumnMetaData(MySQLTableMetaDataLoader.java:95)
        at 
org.apache.shardingsphere.infra.metadata.schema.builder.loader.dialect.MySQLTableMetaDataLoader.loadColumnMetaDataMap(MySQLTableMetaDataLoader.java:77)
        at 
org.apache.shardingsphere.infra.metadata.schema.builder.loader.dialect.MySQLTableMetaDataLoader.loadTableMetaDataMap(MySQLTableMetaDataLoader.java:59)
        at 
org.apache.shardingsphere.infra.metadata.schema.builder.loader.dialect.MySQLTableMetaDataLoader.load(MySQLTableMetaDataLoader.java:54)
        at 
org.apache.shardingsphere.infra.metadata.schema.builder.SchemaBuilder.lambda$appendDialectRemainTables$1(SchemaBuilder.java:116)
   ```
   
![QQ20210626-165352](https://user-images.githubusercontent.com/17311435/123508528-8804e400-d6a2-11eb-9226-f0bba70f8b95.png)
   
   ### Steps to reproduce the behavior, such as: SQL to execute, sharding rule 
configuration, when exception occur etc.
   
   ### Example codes for reproduce this issue (such as a github link).
   


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