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Description

This error indicates that MySQL could not establish an SSL connection because of an underlying issue with the SSL/TLS library it uses (e.g., OpenSSL, LibreSSL). This typically happens during server startup, client connection attempts, or when configuring replication, preventing secure communication.

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Error Message

Failed to set up SSL because of the following SSL library error: %s

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Known Causes

4 known causes

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Missing or Corrupted SSL Libraries

The necessary SSL/TLS libraries required by MySQL are either not installed, are incomplete, or have become corrupted on the server system.

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Invalid SSL Configuration Files

The paths to SSL certificate, key, or CA files specified in the MySQL configuration (my.cnf/my.ini) are incorrect, or the files themselves are malformed or inaccessible.

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Incorrect File Permissions

The MySQL server process lacks the necessary read permissions for the SSL certificate, key, or CA files, preventing it from accessing them during setup.

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Incompatible SSL Library Version

The version of the SSL/TLS library installed on the system is incompatible with the version of MySQL, leading to library function call failures.

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Solutions

3 solutions available

1. Verify SSL Certificate and Key Permissions easy

Ensure the MySQL server process has read access to SSL certificate and key files.

1

Identify the location of your SSL certificate (`ssl_cert`) and private key (`ssl_key`) files. These are typically configured in your `my.cnf` or `my.ini` file.

# Example my.cnf configuration
[mysqld]
ssl_cert = /etc/mysql/ssl/server-cert.pem
ssl_key = /etc/mysql/ssl/server-key.pem

2

Determine the user that the MySQL server runs as. On most Linux systems, this is `mysql`.

ps aux | grep mysqld

3

Use `ls -l` to check the permissions of the certificate and key files. Ensure the MySQL user has read access.

ls -l /etc/mysql/ssl/server-cert.pem
ls -l /etc/mysql/ssl/server-key.pem

4

If permissions are too restrictive, use `chmod` to grant read permissions to the owner or group that the MySQL user belongs to. It's also good practice to ensure the key file is only readable by the owner.

sudo chmod 644 /etc/mysql/ssl/server-cert.pem
sudo chmod 600 /etc/mysql/ssl/server-key.pem

5

Restart the MySQL server to apply the permission changes.

sudo systemctl restart mysql

2. Check for Invalid or Corrupted SSL Files medium

Replace or regenerate SSL certificate and key files if they are invalid or corrupted.

1

Verify the integrity of your SSL certificate and private key files. You can use `openssl` to check for basic validity.

openssl x509 -in /path/to/your/server-cert.pem -noout -text
openssl rsa -in /path/to/your/server-key.pem -check

2

If the `openssl` commands show errors or warnings, your certificate or key might be corrupted or invalid. Consider regenerating your SSL certificates and keys.

# Example of generating a self-signed certificate and key (for testing purposes)
sudo openssl req -newkey rsa:2048 -nodes -keyout server-key.pem -x509 -days 365 -out server-cert.pem

3

Update the `ssl_cert` and `ssl_key` paths in your MySQL configuration file (`my.cnf` or `my.ini`) to point to the newly generated or verified files.

# Example my.cnf configuration
[mysqld]
ssl_cert = /path/to/new/server-cert.pem
ssl_key = /path/to/new/server-key.pem

4

Restart the MySQL server.

sudo systemctl restart mysql

3. Ensure Correct SSL Library and OpenSSL Version Compatibility advanced

Confirm that the installed OpenSSL libraries are compatible with your MySQL version and that they are correctly linked.

1

Determine the OpenSSL version that your MySQL server was compiled against. You can often find this in the MySQL error logs or by checking the output of `mysqld --version`.

mysqld --version

2

Check the installed OpenSSL libraries on your system. Ensure that the versions are compatible. Incompatible versions can lead to linking issues.

openssl version

3

If you suspect a library issue, consider reinstalling or updating your OpenSSL development libraries and then recompiling MySQL from source if necessary. Alternatively, if you installed MySQL via a package manager, try reinstalling MySQL itself, which might pull in compatible library versions.

# Example for Debian/Ubuntu
sudo apt-get update
sudo apt-get install --reinstall libssl-dev mysql-server

4

Verify that the MySQL server is dynamically linking against the correct OpenSSL libraries. You can use `ldd` for this.

ldd $(which mysqld) | grep ssl

5

Restart the MySQL server after any library or package updates.

sudo systemctl restart mysql

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Related Errors

5 related errors

MySQL Error 3888: SSL Library Setup Failure