SQLAlchemy error MySQL server has gone away

Question

Error OperationalError: (OperationalError) (2006, \'MySQL server has gone away\') i\'m already received this error when i coded project on Flask, but i cant underst

Answer 1

https://docs.sqlalchemy.org/en/latest/core/pooling.html#disconnect-handling-optimistic

 def sql_read(cls, sql, connection):
    """sql for read action like select
    """
    LOG.debug(sql)
    try:
        result = connection.engine.execute(sql)
        header = result.keys()
        for row in result:
            yield dict(zip(header, row))
    except OperationalError as e:
        LOG.info("recreate pool duo to %s" % e)
        connection.engine.pool.recreate()
        result = connection.engine.execute(sql)
        header = result.keys()
        for row in result:
            yield dict(zip(header, row))
    except Exception as ee:
        LOG.error(ee)
        raise SqlExecuteError()