Python sqlite3.0错误数据库被锁定，然后计划程序崩溃

我在linux服务器上运行airflow，它可以正常运行几个小时，而airflow Scheduler却无法正常运行

这是日志的输出：

OperationalError: (sqlite3.OperationalError) database is locked [SQL: u'SELECT connection.conn_id AS connection_conn_id \nFROM connection GROUP BY connection.conn_id'] (Background on this error at: http://sqlalche.me/e/e3q8)
[2019-08-14 11:20:20 +0000] [14173] [INFO] Worker exiting (pid: 14173)
[2019-08-14 11:20:20 +0000] [14011] [INFO] Worker exiting (pid: 14011)
[2019-08-14 11:20:20 +0000] [14068] [INFO] Worker exiting (pid: 14068)
[2019-08-14 11:20:20 +0000] [14150] [INFO] Worker exiting (pid: 14150)
[2019-08-14 11:20:20 +0000] [13955] [INFO] Worker exiting (pid: 13955)
[2019-08-14 11:20:20 +0000] [32013] [INFO] Shutting down: Master
[2019-08-14 11:20:20 +0000] [32013] [INFO] Reason: Worker failed to boot.
[2019-08-14 11:20:21,813] {cli.py:808} ERROR - [0 / 0] some workers seem to have died and gunicorndid not restart them as expected
[2019-08-14 11:22:31,885] {cli.py:815} ERROR - No response from gunicorn master within 120 seconds
[2019-08-14 11:22:31,886] {cli.py:816} ERROR - Shutting down webserver

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我如何才能阻止这种情况发生？

当您向sqlite发出请求，而它仍在处理另一个请求时，可能会发生这种错误。这件事发生在我身上，我只是等了一会儿才提出另一个请求。

对于“数据库已锁定”错误，您尝试了什么回应？