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How to Fix MySQL Error – ER_SYNC_MASTER_IGNORED_TABLE

How to Fix MySQL Error – ER_SYNC_MASTER_IGNORED_TABLE

MySQL is a popular open-source relational database management system used by many websites and applications. However, like any software, it can encounter errors that need to be resolved. One such error is the ER_SYNC_MASTER_IGNORED_TABLE error. In this article, we will explore what this error means and how to fix it.

Understanding the ER_SYNC_MASTER_IGNORED_TABLE Error

The ER_SYNC_MASTER_IGNORED_TABLE error occurs when a table is ignored during replication synchronization between the master and slave servers in a MySQL replication setup. This error typically happens when a table is created or altered on the master server, but the slave server fails to replicate the changes due to various reasons.

When this error occurs, it is important to identify the root cause and resolve it to ensure data consistency between the master and slave servers.

Fixing the ER_SYNC_MASTER_IGNORED_TABLE Error

Here are some steps you can take to fix the ER_SYNC_MASTER_IGNORED_TABLE error:

1. Check MySQL Replication Status

First, verify the replication status between the master and slave servers. You can use the following command on the slave server:

SHOW SLAVE STATUSG

Look for the “Slave_IO_Running” and “Slave_SQL_Running” fields. If either of them is set to “No,” it indicates that the replication process is not running correctly.

2. Identify the Ignored Table

Next, identify the table that is being ignored during replication. You can find this information in the “Last_Error” field of the “SHOW SLAVE STATUS” output. The error message will provide details about the ignored table.

3. Check Replication Filters

Review the replication filters on the slave server to ensure that the ignored table is not explicitly excluded from replication. Look for any “replicate-ignore-table” or “replicate-do-table” statements in the MySQL configuration file (my.cnf) or the runtime configuration (SET GLOBAL or SET SESSION).

4. Resolve the Issue

Once you have identified the ignored table and checked the replication filters, you can take appropriate actions to resolve the issue. Here are some possible solutions:

  • Check if the table exists on the master server. If not, create the table on the master server and restart the replication process.
  • If the table exists on the master server but not on the slave server, you can manually create the table on the slave server using the same schema as the master.
  • If the table exists on both the master and slave servers but has different schemas, you need to synchronize the table structure between the two servers.

5. Restart Replication

After resolving the issue, restart the replication process on the slave server using the following command:

START SLAVE;

Monitor the replication status again using “SHOW SLAVE STATUSG” to ensure that the error is resolved and the replication is running smoothly.

Summary

The ER_SYNC_MASTER_IGNORED_TABLE error in MySQL can be resolved by following a few steps. First, check the replication status between the master and slave servers. Identify the ignored table and review the replication filters. Then, take appropriate actions to resolve the issue, such as creating the table or synchronizing the table structure. Finally, restart the replication process and monitor the status to ensure the error is fixed.

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