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## How can I check if data has been loaded into MySQL properly?
Once the mysql container is up and running, you should be able to connect to it dirctly on `localhost:3306` using tools such as [MySQL Workbench](https://www.mysql.com/products/workbench/). You can also run the following command to invoke [MySQL Command-Line Client](https://dev.mysql.com/doc/refman/8.0/en/mysql.html) inside the mysql container.
```
docker exec -it mysql /usr/bin/mysql datahub --user=datahub --password=datahub
```
Inspect the content of `metadata_aspect` table, which contains the ingested aspects for all entities.
## Getting `cannot start service {X}` error while starting Docker containers.
There can be different reasons why a container fails during initialization. Below are the most common reasons:
### bind: address already in use