ERROR 2006 (HY000) at line 1: MySQL server has gone away

Posted 2023-02-24

【中文标题】ERROR 2006 (HY000) at line 1: MySQL server has gone away

【英文标题】：

【发布时间】：2012-10-30 16:52:36

【问题描述】：

我也面临同样的问题。我正在尝试将 mysqldump 文件恢复到我的机器。该文件的大小为 2.7 MB。我在第 1 行收到“ERROR 2006 (HY000): MySQL server has gone away”错误。我增加了 max_allowed_pa​​cket 和 wait_timeout 的大小。但没有任何效果。

以下是我的文件（my-medium.ini）的内容，请建议 我哪里错了。我的安装有各种 ini 文件，我有 修改，我的大，我的中，我的小，我的巨大，我的innodb-heavy-4G。提前致谢！！

---

# Example MySQL config file for medium systems.
#
# This is for a system with little memory (32M - 64M) where MySQL plays
# an important part, or systems up to 128M where MySQL is used together with
# other programs (such as a web server)
#
# You can copy this file to
# /etc/my.cnf to set global options,
# mysql-data-dir/my.cnf to set server-specific options (in this
# installation this directory is C:\mysql\data) or
# ~/.my.cnf to set user-specific options.
#
# In this file, you can use all long options that a program supports.
# If you want to know which options a program supports, run the program
# with the "--help" option.

# The following options will be passed to all MySQL clients
[client]
#password   = your_password
port        = 3306
socket      = /tmp/mysql.sock

# Here follows entries for some specific programs

# The MySQL server
[mysqld]
port        = 3306
socket      = /tmp/mysql.sock
skip-locking
key_buffer_size = 16M
max_allowed_packet = 512M
table_open_cache = 64
sort_buffer_size = 512K
net_buffer_length = 8K
read_buffer_size = 256K
read_rnd_buffer_size = 512K
myisam_sort_buffer_size = 8M
wait_timeout = 6000

# Don't listen on a TCP/IP port at all. This can be a security enhancement,
# if all processes that need to connect to mysqld run on the same host.
# All interaction with mysqld must be made via Unix sockets or named pipes.
# Note that using this option without enabling named pipes on Windows
# (via the "enable-named-pipe" option) will render mysqld useless!
# 
#skip-networking

# Replication Master Server (default)
# binary logging is required for replication
log-bin=mysql-bin

# binary logging format - mixed recommended
binlog_format=mixed

# required unique id between 1 and 2^32 - 1
# defaults to 1 if master-host is not set
# but will not function as a master if omitted
server-id   = 1

# Replication Slave (comment out master section to use this)
#
# To configure this host as a replication slave, you can choose between
# two methods :
#
# 1) Use the CHANGE MASTER TO command (fully described in our manual) -
#    the syntax is:
#
#    CHANGE MASTER TO MASTER_HOST=<host>, MASTER_PORT=<port>,
#    MASTER_USER=<user>, MASTER_PASSWORD=<password> ;
#
#    where you replace <host>, <user>, <password> by quoted strings and
#    <port> by the master's port number (3306 by default).
#
#    Example:
#
#    CHANGE MASTER TO MASTER_HOST='125.564.12.1', MASTER_PORT=3306,
#    MASTER_USER='joe', MASTER_PASSWORD='secret';
#
# OR
#
# 2) Set the variables below. However, in case you choose this method, then
#    start replication for the first time (even unsuccessfully, for example
#    if you mistyped the password in master-password and the slave fails to
#    connect), the slave will create a master.info file, and any later
#    change in this file to the variables' values below will be ignored and
#    overridden by the content of the master.info file, unless you shutdown
#    the slave server, delete master.info and restart the slaver server.
#    For that reason, you may want to leave the lines below untouched
#    (commented) and instead use CHANGE MASTER TO (see above)
#
# required unique id between 2 and 2^32 - 1
# (and different from the master)
# defaults to 2 if master-host is set
# but will not function as a slave if omitted
#server-id       = 2
#
# The replication master for this slave - required
#master-host     =   <hostname>
#
# The username the slave will use for authentication when connecting
# to the master - required
#master-user     =   <username>
#
# The password the slave will authenticate with when connecting to
# the master - required
#master-password =   <password>
#
# The port the master is listening on.
# optional - defaults to 3306
#master-port     =  <port>
#
# binary logging - not required for slaves, but recommended
#log-bin=mysql-bin

# Point the following paths to different dedicated disks
#tmpdir     = /tmp/     
#log-update     = /path-to-dedicated-directory/hostname

# Uncomment the following if you are using InnoDB tables
#innodb_data_home_dir = C:\mysql\data/
#innodb_data_file_path = ibdata1:10M:autoextend
#innodb_log_group_home_dir = C:\mysql\data/
# You can set .._buffer_pool_size up to 50 - 80 %
# of RAM but beware of setting memory usage too high
#innodb_buffer_pool_size = 16M
#innodb_additional_mem_pool_size = 2M
# Set .._log_file_size to 25 % of buffer pool size
#innodb_log_file_size = 5M
#innodb_log_buffer_size = 8M
#innodb_flush_log_at_trx_commit = 1
#innodb_lock_wait_timeout = 50

[mysqldump]
quick
max_allowed_packet = 512M

[mysql]
no-auto-rehash
# Remove the next comment character if you are not familiar with SQL
#safe-updates

[myisamchk]
key_buffer_size = 20M
sort_buffer_size = 20M
read_buffer = 2M
write_buffer = 2M

[mysqlhotcopy]
interactive-timeout

【问题讨论】：

任何回复！没有人知道这个的解决方案:(

我不认为有任何这样的问题，如果我要从本地机器恢复转储，那么它工作正常。仅当我从服务器上创建的 mysql 表导入转储时才会出错。

使用 --max_allowed_pa​​cket= 选项尝试 mysqldump。

我使用xampp在本地运行MySQL，它带有相同的ini文件集（小、中、大、巨大、重4G）。导入 csv 文件时，我有 #2006 - MySQL 服务器已消失 或 1153 - Got a packet greater than 'max_allowed_pa​​cket' bytes 消息。 @Sangeeta您找到解决方案了吗？谢谢

ERROR 2006 (HY000): MySQL server has gone away 的可能重复项

【参考方案1】：

更改 my.cnf 文件中的 3 个设置

在[mysqld]下

max_allowed_packet = 64M
wait_timeout = 6000

在[mysqldump]下

max_allowed_packet = 64M

应该可以解决的

【参考方案2】：

我刚刚发现这个错误发生是因为我使用的是“windows power-shell”而不是命令提示符:)) 解决了！！！

【参考方案3】：

这通常意味着您“与 MySQL 服务器的当前版本不兼容”，请参阅mysql_upgrade。我遇到了同样的问题，只需要运行：

mysql_upgrade --password

文档指出，“每次升级 MySQL 时都应执行 mysql_upgrade”。

【参考方案4】：

[mysqld]下我试过以下：

max_allowed_packet = 2096M

重新启动mysqld但它没有工作，但是对我有用的是从命令行全局设置max_allowed_packet，然后从转储运行导出，它没有任何问题。

您可以根据数据库从较小的数据包大小开始，我也确实重新导入了相同大小的数据库。

出口：-

mysqldump --opt --user=confluenceUser --password='<passwd>' --max_allowed_packet=2147483648 confluencedb | gzip > confluencedb.sql.gz

进口：-

mysql> SET GLOBAL max_allowed_packet=2147483648;

Query OK, 0 rows affected, 1 warning (0.00 sec)

zcat confluence.sql.gz | mysql -uconfluence -p<passwd> confluencedb

【参考方案5】：

上面的答案可以提供帮助，只需添加我的建议，因为您可以通过使用 source 命令直接导入来绕过限制。 作为 mysql -u username -p database_name

mysql -u username -p    
mysql> use db_name;
mysql> source path-to/file.sql;

【参考方案6】：

我在恢复更大的表时遇到了同样的问题： “SQL Fehler (2006)：MySQL 服务器已经消失”。

解决方案： 使用较小的查询。不要用逗号分隔的行导出大查询。将其更改为每行单个“INSERT”或“REPLACE”。