Subject Re: [firebird-support] FBServer.exe terminates unexpectedly Code: 335544741, Error: connection lost to database
Author Helen Borrie
At 09:55 a.m. 16/09/2015, Saravana Pitchaimuthu saravana.pitchaimuthu@... [firebir wrote:

> FBServer.exe terminates unexpectedly after few hours of operation with the error mentioned above. Any idea on how to proceed with debugging the issue or any resolutions available?
>Version: Firebird 2.5.3 Security Update 1
>Model: SuperServer
>OS: Windows Server 2008 R2
>Language and data caccess interface: C++, fbclient.dll

The first step would be to inspect the firebird.log and see whether anything was going on prior to the crash. Of course you won't see anything if this "crash" wasn't a crash but someone rebooting the server or stopping the service. (Cleaning staff coming in at roughly the same time every day and pulling out the server plug so they can plug in their vacuum cleaner? Not a joke - it really happens!)

Another thing that can cause Firebird to crash is a bad UDF. That won't usually cause a log message because it may have crashed the server before it had a chance to generate one.

You might like to have a look at the Bug Fixes section of the Firebird 2.5.4 release notes, under "Server crashes" in case something there rings a bell. You can read them on-line:

Or you might simply want to do the easy thing and replace your installation with v.2.5.4.