failed to get fqdn, code:-11, reason:system error

[Amethyst-w]

Bug Description failed to get fqdn, code:-11, reason:system error. 单线程实时写入股票行情，出现上述报错，检查发现行情缺失。

To Reproduce `int to_tick_db_async(const instr_price& data) { std::string tags_instr_id; std::string c_tab_sql; std::string ins_sql;

    get_tags_instr_id(data.instr_id, tags_instr_id);
    
    get_insert_sql(tags_instr_id, data, ins_sql);
    taos_query_a(db_conn_async_, ins_sql.c_str(), taos_insert_call_back, (void *)(common::date_util::get_nanosecs_since_epoch()));

    return 0;
}

void taos_insert_call_back(void* param, TAOS_RES* tres, int code) { unsigned long long* insert_time = (unsigned long long *)param; struct timeval systemTime; char sql[128];

    if (code < 0) 
    {
    }
    else if (code == 0) 
    {
    }
    else
    {
    }

    taos_free_result(tres);
}`

Expected Behavior 写入的行情，确保完整性。

Screenshots If applicable, add screenshots to help explain your problem.

Environment (please complete the following information):

• OS : Ubuntu 22.04.1
• Memory : 128G, CPU : 32, current Disk Space : 系统盘 1T，TDengine data存储是挂载的nas 49T
• TDengine Version : 3.0.1.2

Additional Context Add any other context about the problem here.

[yu285]

请问是单机还是集群

[Amethyst-w]

请问是单机还是集群

单机

[yu285]

可以在 服务端 ulimit -n 600000 ,然后再试下。

应该是异步API导致的，服务端打开句柄遭到瓶颈。