当我向网络服务器发出请求时，所有其他响应将是500错误。
错误是：
Traceback (most recent call last): File "/var/env/argos/lib/python3.3/site-packages/sqlalchemy/engine/base.py",line 867,in _execute_context context) File "/var/env/argos/lib/python3.3/site-packages/sqlalchemy/engine/default.py",line 388,in do_execute cursor.execute(statement,parameters) psycopg2.OperationalError: SSL error: decryption Failed or bad record mac The above exception was the direct cause of the following exception: sqlalchemy.exc.OperationalError: (OperationalError) SSL error: decryption Failed or bad record mac
result = models.Event.query.get(id)
uwsgi由管理员管理，它有一个配置：
[program:my_app] command=/usr/bin/uwsgi --ini /etc/uwsgi/apps-enabled/myapp.ini --catch-exceptions directory=/path/to/my/app stopsignal=QUIT autostart=true autorestart=true
和uwsgi的配置看起来像：
[uwsgi] socket = /tmp/my_app.sock logto = /var/log/my_app.log plugins = python3 virtualenv = /path/to/my/venv pythonpath = /path/to/my/app wsgi-file = /path/to/my/app/application.py callable = app max-requests = 1000 chmod-socket = 666 chown-socket = www-data:www-data master = true processes = 2 no-orphans = true log-date = true uid = www-data gid = www-data
我可以得到的最远的是它与uwsgi的分叉有关。但除此之外，我还不清楚需要做些什么。
当使用主进程处理多个进程时，uwsgi将在主进程中初始化应用程序，然后将应用程序复制到每个工作进程。问题是如果您在初始化应用程序时打开数据库连接，则会有多个进程共享相同的连接，从而导致上述错误。
解决方案是设置懒惰configuration option for uwsgi，这迫使应用程序在每个进程中完全加载：
lazySet lazy mode (load apps in workers instead of master).
This option may have memory usage implications as Copy-on-Write semantics can not be used. When lazy is enabled,only workers will be reloaded by uWSGI’s reload signals; the master will remain alive. As such,uWSGI configuration changes are not picked up on reload by the master.
还有一个懒惰应用程序选项：
lazy-appsLoad apps in each worker instead of the master.
This option may have memory usage implications as Copy-on-Write semantics can not be used. Unlike lazy,this only affects the way applications are loaded,not master’s behavior on reload.
这个uwsgi配置最终为我工作：
[uwsgi] socket = /tmp/my_app.sock logto = /var/log/my_app.log plugins = python3 virtualenv = /path/to/my/venv pythonpath = /path/to/my/app wsgi-file = /path/to/my/app/application.py callable = app max-requests = 1000 chmod-socket = 666 chown-socket = www-data:www-data master = true processes = 2 no-orphans = true log-date = true uid = www-data gid = www-data # the fix lazy = true lazy-apps = true
