MySQL · December 20, 2023

How to Fix MySQL Error - ER_SYNC_NO_PARALLEL_THREADS

How to Fix MySQL Error - ER_SYNC_NO_PARALLEL_THREADS

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 can disrupt its normal operation. One such error is the ER_SYNC_NO_PARALLEL_THREADS error. In this article, we will explore what this error means and how to fix it.

Understanding the ER_SYNC_NO_PARALLEL_THREADS Error

The ER_SYNC_NO_PARALLEL_THREADS error is a MySQL error that occurs when attempting to start the MySQL server with the --sync-binlog=1 option. This option is used to enable binary logging, which is essential for replication and point-in-time recovery.

When this error occurs, it means that the MySQL server is unable to start because the --sync-binlog=1 option requires the --innodb-thread-concurrency option to be set to 0. However, if the --innodb-thread-concurrency option is set to a value other than 0, the ER_SYNC_NO_PARALLEL_THREADS error is triggered.

Fixing the ER_SYNC_NO_PARALLEL_THREADS Error

To fix the ER_SYNC_NO_PARALLEL_THREADS error, you need to modify the MySQL configuration file and set the --innodb-thread-concurrency option to 0. Here are the steps to do so:

  1. Locate the MySQL configuration file. The location of this file may vary depending on your operating system and MySQL installation. Common locations include /etc/my.cnf, /etc/mysql/my.cnf, or C:Program FilesMySQLMySQL Server X.Xmy.ini.
  2. Open the MySQL configuration file in a text editor.
  3. Search for the [mysqld] section in the configuration file.
  4. Add or modify the following line within the [mysqld] section:
    innodb_thread_concurrency = 0
  5. Save the changes to the MySQL configuration file.
  6. Restart the MySQL server for the changes to take effect.

After following these steps, the ER_SYNC_NO_PARALLEL_THREADS error should no longer occur, and the MySQL server should start successfully with the --sync-binlog=1 option enabled.

Summary

In conclusion, the ER_SYNC_NO_PARALLEL_THREADS error is a MySQL error that occurs when starting the MySQL server with the --sync-binlog=1 option. To fix this error, you need to set the --innodb-thread-concurrency option to 0 in the MySQL configuration file. By doing so, the MySQL server will start successfully without triggering the ER_SYNC_NO_PARALLEL_THREADS error.

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