Conquering SeaTunnel Challenges: Your Go-To Solutions Revealed

Do I need to install engines like Spark or Flink to use SeaTunnel?

No, SeaTunnel supports Zeta, Spark, and Flink as options for the integration engine. You can choose one of them. The community especially recommends using Zeta, a new-generation high-performance engine specifically built for integration scenarios.

The community provides the most support for Zeta, which also has richer features.

What data sources and destinations does SeaTunnel support?

SeaTunnel supports a variety of data sources and destinations. You can find the detailed list on the official website:

• Supported data sources (Source):
  

Which data sources currently support CDC (Change Data Capture)?

Currently, CDC is supported for MongoDB CDC, MySQL CDC, OpenGauss CDC, Oracle CDC, PostgreSQL CDC, SQL Server CDC, TiDB CDC, etc. For more details, refer to the .

Open "SQL Server Configuration Manager" from the Start menu, navigate to "SQL Server Services," right-click the "SQL Server Agent" instance, and start it.

1. Firstly, enable CDC at the database level:
   

USE TestDB; -- Replace with your actual database name

EXEC sys.sp_cdc_enable_db;



-- Check if the database has CDC enabled

SELECT name, is_cdc_enabled

FROM sys.databases

WHERE name = 'database'; -- Replace with the name of your database

1. Secondly, enable CDC at the table level:
   

USE TestDB; -- Replace with your actual database name

EXEC sys.sp_cdc_enable_table

@source_schema = 'dbo',

@source_name = 'table', -- Replace with the table name

@role_name = NULL,

@capture_instance = 'table'; -- Replace with a unique capture instance name



-- Check if the table has CDC enabled

SELECT name, is_tracked_by_cdc

FROM sys.tables

WHERE name = 'table'; -- Replace with the table name

Does SeaTunnel support CDC synchronization for tables without primary keys?

No, CDC synchronization is not supported for tables without primary keys. This is because, if there are two identical rows upstream and one is deleted or modified, it would be impossible to distinguish which row should be deleted or modified downstream, potentially resulting in both rows being affected.

Error during PostgreSQL task execution: Caused by: org.postgresql.util.PSQLException: ERROR: all replication slots are in use

This error occurs when the replication slots in PostgreSQL are full and need to be released. Modify the postgresql.conf file to increase max_wal_senders and max_replication_slots, then restart the PostgreSQL service using the command:

systemctl restart postgresql

Example configuration:

max_wal_senders = 1000      # max number of walsender processes

max_replication_slots = 1000     # max number of replication slots

What should I do if I have a problem that I can't solve on my own?

If you encounter an issue while using SeaTunnel that you cannot resolve, you can:

1. Search the to see if someone else has asked the same question and received an answer.


2. If you can't find an answer, reach out to the community for help using
   
   
   

   
   
   
   How do I write a multi-line text configuration in the configuration file?
   

   
   
   

   To break a long text into multiple lines, use triple double quotes to indicate the start and end:
   
   

   
   
   
   
   

   CODE Kopieren

   var = """
   
   Apache SeaTunnel is a
   
   next-generation high-performance,
   
   distributed, massive data integration tool.
   
   """
   
   

   
   
   
   
   
   
   
   

   
   
   
   How can I perform variable substitution in multi-line text?
   

   
   
   

   Variable substitution in multi-line text is tricky, as variables cannot be enclosed within triple double quotes:
   
   

   
   
   
   
   

   CODE Kopieren

   var = """
   
   your string 1
   
   """${you_var}""" your string 2"""
   
   

   
   
   
   
   
   
   
   

   See the issue for more information:

   
   
   

   
   
   
   If I want to develop my own source, sink or transform program, do I need to understand all of SeaTunnel's source code?
   

   
   
   

   No, you only need to focus on the interfaces related to source, sink, and transform. If you'd like to develop your own connector using SeaTunnel's API (Connector V2), refer to Connector Development Guide.

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