MySQL Replication 遇到 error 1236错误的修复方法
MySQL Replication 遇到 error 1236 就有点麻烦了~ 通常都是 binlog 出问题造成的~ (Master 或 Slave 的 binlog 坏掉都有可能造成此错误) 通常遇到这个状况, 都是 Slave 的 binlog 坏掉, 就 Slave DB 的资料重倒来解决, 但是此次遇到是 Master 的 binlog 坏
MySQL Replication 遇到 error 1236 就有点麻烦了~ 通常都是 binlog 出问题造成的~ (Master 或 Slave 的 binlog 坏掉都有可能造成此错误)
通常遇到这个状况, 都是 Slave 的 binlog 坏掉, 就 Slave DB 的资料重倒来解决, 但是此次遇到是 Master 的 binlog 坏掉, 就有点苦了~
错误讯息如下:
Last_IO_Errno: 1236
Last_IO_Error: Got fatal error 1236 from master when reading data from binary log: 1Client requested master to start replication from impossible position2 the first event 1mysql-bin.0035831 at 45997491, the last event read from 1./mysql-bin.0035831 at 4, the last byte read from 1./mysql-bin.0035831 at 4.1
MySQL Replication 遇到 Got fatal error 1236 from master 修復
mysql> SHOW SLAVE STATUSG
错误讯息如下: (已经把不必要得删除)
Master_Log_File: mysql-bin.003583
Read_Master_Log_Pos: 45997491
Relay_Log_File: mysqld-relay-bin.006789
Relay_Log_Pos: 103569723
Relay_Master_Log_File: mysql-bin.003361
Slave_IO_Running: No
Slave_SQL_Running: Yes
Last_Errno: 0
Skip_Counter: 0
Last_IO_Errno: 1236 Last_IO_Error: Got fatal error 1236 from master when reading data from binary log: 1Client requested master to start replication from impossible position2 the first event 1mysql-bin.0035831 at 45997491, the last event read from 1./mysql-bin.0035831 at 4, the last byte read from 1./mysql-bin.0035831 at 4.1
註: Debian / Ubuntu Linux 预设 MySQL data path: /var/lib/mysql, 所以下述 binlog 可於此路径寻找.
Slave binlog 坏掉的解法
一般常见是 Slave binlog 坏掉, 所以都会先去 Slave 找 mysql-bin.003583 档案.
再把 mysql-bin.003583 的资料用 mysqlbinlog dump 出来, 指到下一个 position 即可.
Slave: ls /var/lib/mysql/mysql-bin.003583 # not found.
Slave 不存在档案, 才发现到坏的是 Master.
Master binlog 坏掉的解法
Master: # mysqlbinlog /var/lib/mysql/mysql-bin.003583 > ~/3583
ERROR: Error in Log_event::read_log_event(): 1read error1, data_len: 27, event_type: 16
最苦的状况是 Master 的 binlog 坏掉了, 所以所有 Slave 都死光光. XD
此时可以考虑几种作法:
全部 Slave 重倒 (最保险, no data lost)
先让 Replication 可以啟动, 再来 重倒 / sync 一定需要同步的资料即可. (Cache … 那种就可以不用理他)
下面是採用第二种作法:
mysql> STOP SLAVE2
mysql> CHANGE MASTER TO master_log_file = 1mysql-bin.0035841, master_log_pos = 02 # 先指到下一个 binlog 档, pos 指 0 或 4, 都是一样意思.
mysql> START SLAVE2
mysql> SHOW SLAVE STATUS G # 於此应该就恢復了.
然后在对重要的 Table 用 pt-table-sync 来补一补即可. (apt-get install percona-toolkit)
,
Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics











Laravel is a PHP framework for easy building of web applications. It provides a range of powerful features including: Installation: Install the Laravel CLI globally with Composer and create applications in the project directory. Routing: Define the relationship between the URL and the handler in routes/web.php. View: Create a view in resources/views to render the application's interface. Database Integration: Provides out-of-the-box integration with databases such as MySQL and uses migration to create and modify tables. Model and Controller: The model represents the database entity and the controller processes HTTP requests.

MySQL and phpMyAdmin are powerful database management tools. 1) MySQL is used to create databases and tables, and to execute DML and SQL queries. 2) phpMyAdmin provides an intuitive interface for database management, table structure management, data operations and user permission management.

Compared with other programming languages, MySQL is mainly used to store and manage data, while other languages such as Python, Java, and C are used for logical processing and application development. MySQL is known for its high performance, scalability and cross-platform support, suitable for data management needs, while other languages have advantages in their respective fields such as data analytics, enterprise applications, and system programming.

Article summary: This article provides detailed step-by-step instructions to guide readers on how to easily install the Laravel framework. Laravel is a powerful PHP framework that speeds up the development process of web applications. This tutorial covers the installation process from system requirements to configuring databases and setting up routing. By following these steps, readers can quickly and efficiently lay a solid foundation for their Laravel project.

In MySQL, the function of foreign keys is to establish the relationship between tables and ensure the consistency and integrity of the data. Foreign keys maintain the effectiveness of data through reference integrity checks and cascading operations. Pay attention to performance optimization and avoid common errors when using them.

The main difference between MySQL and MariaDB is performance, functionality and license: 1. MySQL is developed by Oracle, and MariaDB is its fork. 2. MariaDB may perform better in high load environments. 3.MariaDB provides more storage engines and functions. 4.MySQL adopts a dual license, and MariaDB is completely open source. The existing infrastructure, performance requirements, functional requirements and license costs should be taken into account when choosing.

SQL is a standard language for managing relational databases, while MySQL is a database management system that uses SQL. SQL defines ways to interact with a database, including CRUD operations, while MySQL implements the SQL standard and provides additional features such as stored procedures and triggers.

MySQL and phpMyAdmin can be effectively managed through the following steps: 1. Create and delete database: Just click in phpMyAdmin to complete. 2. Manage tables: You can create tables, modify structures, and add indexes. 3. Data operation: Supports inserting, updating, deleting data and executing SQL queries. 4. Import and export data: Supports SQL, CSV, XML and other formats. 5. Optimization and monitoring: Use the OPTIMIZETABLE command to optimize tables and use query analyzers and monitoring tools to solve performance problems.
