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

AI Hentai Generator
Generate AI Hentai for free.

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

Big data structure processing skills: Chunking: Break down the data set and process it in chunks to reduce memory consumption. Generator: Generate data items one by one without loading the entire data set, suitable for unlimited data sets. Streaming: Read files or query results line by line, suitable for large files or remote data. External storage: For very large data sets, store the data in a database or NoSQL.

MySQL query performance can be optimized by building indexes that reduce lookup time from linear complexity to logarithmic complexity. Use PreparedStatements to prevent SQL injection and improve query performance. Limit query results and reduce the amount of data processed by the server. Optimize join queries, including using appropriate join types, creating indexes, and considering using subqueries. Analyze queries to identify bottlenecks; use caching to reduce database load; optimize PHP code to minimize overhead.

Backing up and restoring a MySQL database in PHP can be achieved by following these steps: Back up the database: Use the mysqldump command to dump the database into a SQL file. Restore database: Use the mysql command to restore the database from SQL files.

How to insert data into MySQL table? Connect to the database: Use mysqli to establish a connection to the database. Prepare the SQL query: Write an INSERT statement to specify the columns and values to be inserted. Execute query: Use the query() method to execute the insertion query. If successful, a confirmation message will be output.

One of the major changes introduced in MySQL 8.4 (the latest LTS release as of 2024) is that the "MySQL Native Password" plugin is no longer enabled by default. Further, MySQL 9.0 removes this plugin completely. This change affects PHP and other app

To use MySQL stored procedures in PHP: Use PDO or the MySQLi extension to connect to a MySQL database. Prepare the statement to call the stored procedure. Execute the stored procedure. Process the result set (if the stored procedure returns results). Close the database connection.

Creating a MySQL table using PHP requires the following steps: Connect to the database. Create the database if it does not exist. Select a database. Create table. Execute the query. Close the connection.

Oracle database and MySQL are both databases based on the relational model, but Oracle is superior in terms of compatibility, scalability, data types and security; while MySQL focuses on speed and flexibility and is more suitable for small to medium-sized data sets. . ① Oracle provides a wide range of data types, ② provides advanced security features, ③ is suitable for enterprise-level applications; ① MySQL supports NoSQL data types, ② has fewer security measures, and ③ is suitable for small to medium-sized applications.
