Available in VPC
Learn how to resolve issues with Database Migration Service. Click any error for detailed troubleshooting steps.
Troubleshoot common issues
The following are examples of common errors you might encounter:
Migration error
Migration was not performed.
Migration incomplete
All migration steps, including replication, have been completed, but the status is displayed as "migration" in the Cloud DB for MySQL console.
Migration error on definer account set in source DB
The definer account that is set in the source DB was not automatically created during migration.
DB Config settings not migrated
DB Config settings were not migrated.
Test Connection delay
Test connection takes too much time.
["Killed
Permission error
An insufficient privileges message is displayed.
DB access setting problem
The following are examples of DB access errors you might encounter:
Source DB and Target DB server communication error
Source DB and Target DB servers are not communicating.
Source DB access error
Attempted Test Connection but cannot access Source DB.
Display DB ACL check message
When trying Test Connection, DB ACL check message displays.
BACKUP_ADMIN/RELOAD permission
I want to use mydumper method, but I recieved the message BACKUP_ADMIN/RELOAD permissions.
Migration between DBs of different versions
The following are examples of migration errors you might encounter:
Compatibility issue
When migrating from the lower version of MySQL to the higher version, a compatibility issue occurs.
Error when migrating from Source DB MySQL version 5.7 and MariaDB version 10.1 or later to Target DB MySQL version 8.0
Error occurs when migrating from Source DB MySQL version 5.7 and MariaDB version 10.1 or later to Target DB MySQL version 8.0.
Replication consistency issues with MySQL 5.7.40
Replication consistency issues occur in MySQL version 5.7.40.
"Collations unsupported in Target DB are included." Troubleshoot error messages
"Collations unsupported in Target DB are included." The error message appears.
Learning resources
We offer various materials for you to explore. To learn more about Database Migration Service, check out these helpful links:
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FAQs: Get answers to common Database Migration Service questions
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\NAVER Cloud Platform blog: [Easily migrate DB to Cloud with Database Migration Service!
](https://blog.naver.com/n_cloudplatform/222934126770?trackingCode=blog_bloghome_searchlist){target="_blank"}
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