Connection Pool - FbConnectionInternal.Database.BrokenConnection
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Key: DNET-917
URL: http://tracker.firebirdsql.org/browse/DNET-917
Project: .NET Data provider
Issue Type: Bug
Components: ADO.NET Provider
Affects Versions: 7.1.1.0
Reporter: Patrick Frießnegg
Assignee: Jiri Cincura
Priority: Minor
When a network issue leads to a broken connection (like you kill fbinet.exe in
classic mode) you get following exception:
Message "Unable to complete network request to host \"\r\nNo message for error
code 335544721 found." string
at FirebirdSql.Data.FirebirdClient.FbCommand.ExecuteScalar()
in
C:\Synesc.GmbH\source\git\synesc.FirebirdClient\Provider\src\FirebirdSql.Data.FirebirdClient\FirebirdClient\FbCommand.cs:line
528
+ ex.GetType() {Name = "FbException" FullName =
"FirebirdSql.Data.FirebirdClient.FbException"} System.Type {System.RuntimeType}
This does set FbConnectionInternal.Database.BrokenConnection to true, so the
connection is not put back into the connectionpool.
But if you simulate the same issue with "delete from mon$attachments" you get:
Message "connection shutdown" string
at FirebirdSql.Data.FirebirdClient.FbCommand.ExecuteScalar()
in
C:\Synesc.GmbH\source\git\synesc.FirebirdClient\Provider\src\FirebirdSql.Data.FirebirdClient\FirebirdClient\FbCommand.cs:line
528
+ ex.GetType() {Name = "FbException" FullName =
"FirebirdSql.Data.FirebirdClient.FbException"} System.Type {System.RuntimeType}
In this case, FbConnectionInternal.Database.BrokenConnection is not set and
therefore the connection IS put back into the connectionpool.
But this connection is still permanently broken. The next time it's used, it's
100% going to fail.
It is a minor issue tho, because in the second attempt it will throw the
exception #1, and therefore clean itself after.
But still the software will always require a second attempt to request the
database.
related to
http://tracker.firebirdsql.org/browse/DNET-668
http://tracker.firebirdsql.org/browse/DNET-818
http://tracker.firebirdsql.org/browse/DNET-916
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