mysql - 通信链路故障时 Grails 重新连接到 mysql
问题描述
我有一个困扰了很长一段时间的错误,仍然没有解决方案
每当我收到:
2018-07-16 11:21:27,815 [Thread-4] WARN spi.SqlExceptionHelper - SQL 错误:0,SQLState:08S01 2018-07-16 11:21:27,815 [Thread-4] 错误 spi.SqlExceptionHelper - 通信链接失败
从服务器成功接收到的最后一个数据包是 197,301 毫秒前。最后一个成功发送到服务器的数据包是在 197,301 毫秒前。
该应用程序似乎永远不会重新连接。即使这是我的数据源配置(它是外部配置):
dataSource.dbCreate=none
dataSource.driverClassName=com.mysql.jdbc.Driver
dataSource.url=jdbc:mysql://****/*****?autoReconnect=true&failOverReadOnly=false&maxReconnects=10
dataSource.username=***
dataSource.password=******
dataSource.properties.maxActive = 50
dataSource.properties.maxIdle = 25
dataSource.properties.minIdle = 1
dataSource.properties.initialSize = 1
dataSource.properties.numTestsPerEvictionRun = 3
dataSource.properties.maxWait = 10000
dataSource.properties.testOnBorrow = true
dataSource.properties.testWhileIdle = true
dataSource.properties.testOnReturn = true
dataSource.properties.validationQuery = "select now()"
dataSource.properties.minEvictableIdleTimeMillis = 300000
dataSource.properties.timeBetweenEvictionRunsMillis = 300000
我在这个问题上看到了几个问题,但没有什么能真正为我解决这个问题。
注意:我只是想强调这种情况很少发生,所以我不是要解决链接连接失败的问题,我只是希望在重试后重新连接时系统不会挂起(另一个 C 进程处理这足够了,所以我怀疑问题出在 Hibernate 或 Grails 上)
这些是我的mysql配置
[client]
port=3306
socket=/data/db/mysql/mysql.sock
[mysqld]
port=3306
datadir=/data/db/mysql
socket=/data/db/mysql/mysql.sock
log-bin=/data/db/mysql/mysql-bin
binlog_format=row
user=mysql
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
server-id=1
max_connections=250
[mysqld_safe]
log-bin=/data/db/mysql/mysql-bin
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
server-id=1
max_connections=250
其他一些信息
| wait_timeout | 28800
| tx_isolation | REPEATABLE-READ
| thread_handling | one-thread-per-connection
| Table_locks_immediate | 15090998 |
| Table_locks_waited | 7453 |
| table_definition_cache | 256
| table_lock_wait_timeout | 50
| table_open_cache | 64
| table_type | MyISAM
|Bytes_received | 2844964922 |
| Bytes_sent | 5623597485 |
| Com_select | 15003437 |
| Com_set_option | 35905 |
| Handler_commit | 10842183 |
| Handler_delete | 76 |
| Handler_discover | 0 |
| Handler_prepare | 410224 |
| Handler_read_first | 90118 |
| Handler_read_key | 47411397 |
| Handler_read_next | 6354573941 |
| Handler_read_prev | 2900331388 |
| Handler_read_rnd | 449 |
| Handler_read_rnd_next | 2183682054024 |
| Handler_rollback | 44 | |
解决方案
这可能是由于初始数据源池大小和您的 mysql 超时配置造成的。我使用以下配置:
dataSource {
pooled = true
jmxExport = true
dbCreate = 'validate'
driverClassName = 'com.mysql.jdbc.Driver'
dialect = 'org.hibernate.dialect.MySQL5InnoDBDialect'
properties {
jmxEnabled = true
maxActive = 50
maxIdle = 25
minIdle = 5
initialSize = 5
minEvictableIdleTimeMillis = 60000
timeBetweenEvictionRunsMillis = 5000
maxWait = 10000
maxAge = 10 * 60000
numTestsPerEvictionRun = 3
testOnBorrow = true
testWhileIdle = true
testOnReturn = false
ignoreExceptionOnPreLoad = true
validationQuery = "SELECT 1"
validationQueryTimeout = 3
jdbcInterceptors = "ConnectionState;StatementCache(max=200)"
defaultTransactionIsolation = java.sql.Connection.TRANSACTION_READ_COMMITTED
abandonWhenPercentageFull = 100
removeAbandonedTimeout = 120
removeAbandoned = true
logAbandoned = false
dbProperties {
autoReconnect = true
jdbcCompliantTruncation = false
zeroDateTimeBehavior = 'convertToNull'
}
}
}
随着:
dataSource {
url = "jdbc:mysql://localhost:3306/dbname?useSSL=false&useUnicode=yes&characterEncoding=UTF-8&autoReconnect=true"
username = "user"
password = "xxxxx"
logSql = true
}
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