应用程序池回收时与Oracle数据库的C＃连接超时

Question

We have a web page which uses ODP.Net to connect to oracle database from ASP MVC page. During the heavy user load if application pool recycles for any reason, than we get few connection timeout errors from internal oracle class.

Inner Exception: StackTrace: at OracleInternal.ConnectionPool.PoolManager`3.Get(ConnectionString csWithDiffOrNewPwd, Boolean bGetForApp, String affinityInstanceName, Boolean bForceMatch)

How can we handle this scenario ? what could be the reason for this error ?

Answer 1

If you are using a new connection string that differs per user or with some other variable parameter you can exceed your max connections. Pooling only works if you use the exact same string. Under the covers your "close" is ignored and the connection manager keeps the connection open. In SQL Server you can see a connection reset in the trace console every time an existing connection is reused.

Oracle probably has something similar.

Tracing your connections and possibly connection resets will most likely shed some light on what is creating so many connections.