加大超时时间
加大超时时间
at com.mysql.jdbc.Connection.createNewIO(Connection.java:1783) at com.mysql.jdbc.Connection.<init>(Connection.java:450) at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:411) at java.sql.DriverManager.getConnection(DriverManager.java:512) ...
### 20191219 10:10:10,234 | com.alibaba.druid.filter.logging.Log4jFilter.statementLogError(Log4jFilter.java:152) | ERROR | {conn-10593, pstmt-38675} execute error. update operation_service set offlinemark = ? , resourcestatus = ? where RowGuid = ? com.mysql.jdbc.exceptions.jdbc4.MySQLTra...
"NextResult" and other methods to be treated similarly. However, in MySql.Data, it appears that the elapsed time for I/O is cumulative for all I/O performed by the MySqlCommand. Furthermore, the implementation can throw ArgumentOutOfRangeException (indicating incorrect use of the underlying ...
raise errors.OperationalError(mysql.connector.errors.OperationalError:2055:Lost connection to MySQL server at'127.0.0.1:3306',system error:The read operation timed out mysql server is offline 好现在看到报错中的 `Lost connection to MySQL server at '127.0.0.1:3306'` 了,问题完美的复现了。
update the same data [HttpGet("/demo")] public async Task<string> TestDemo() { var connStr = Consts.YourConn; using (var conn = new MySqlConnection(connStr)) { await conn.OpenAsync(); using (var transaction = await conn.BeginTransactionAsync()) { try { var command = conn....
trx_mysql_thread_id:事务线程 ID,可以和 PROCESSLIST 表JOIN。 trx_query:事务正在执行的SQL语句。 trx_operation_state:事务当前操作状态。 trx_tables_in_use:当前事务执行的SQL中使用的表的个数。 trx_tables_locked:当前执行SQL的行锁数量。 trx_lock_structs:事务保留的锁数量。
Stream读取,Stream读取是在执行SQL前设置FetchSize:statement.setFetchSize(Integer.MIN_VALUE),同时确保游标是只读、向前滚动的(为游标的默认值),MySQL JDBC内置的操作方法是将Statement强制转换为:com.mysql.jdbc.StatementImpl,调用其方法:enableStreamingResults(),这2者达到的效果是一致的,都是启动Stream流方式读取数据...
com.mysql.jdbc.CommunicationsException MESSAGE: Communications link failure due to underlying exception: ** BEGIN NESTED EXCEPTION ** java.io.EOFException STACKTRACE: java.io.EOFException at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1934)