Execute database scripts on disk - Error at longer queries

Good morning,

We have had a strange problem lately with the execute database scripts on disk step in BuildMaster. We had some scripts that took 45+ minutes and when the script finished BuildMaster gave an error.

The message shown in the log is as follows:

An unhandled exception occurred while executing this action: System.NullReferenceException: Object reference not set to an instance of an object.
   at Inedo.BuildMaster.Extensibility.Agents.Tcp.TcpAgent.Inedo.BuildMaster.Extensibility.Agents.IRemoteCommandExecuter.ExecuteCommand(RemoteActionBase action, String commandName, String[] commandArgs)
   at Inedo.BuildMaster.Extensibility.Actions.RemoteActionBase.ExecuteRemoteCommand(String name, String[] args)
   at Inedo.BuildMaster.Extensibility.Actions.ProviderBasedAction`1.Execute()
   at Inedo.BuildMaster.Extensibility.Actions.ActionBase.ExecuteInternal(IActionExecutionContext context, ExtensionConfigurerBase extensionConfigurer, Boolean resumeNextOnError, Boolean logErrorsAsWarnings)

When we go look in the global error logs of BuildMaster we can however find another error log:

Logged:
14/09/2016 11:43:07
Level:
Error Error
Category:
Agent Updates
Message:
Error scanning agent for DKVACCSRVM003 (9)
Details:
at Inedo.BuildMaster.Extensibility.Agents.Tcp.TcpAgent.GetAgentStatusInternal(IHostedAgentContext context)
at Inedo.BuildMaster.Windows.ServiceApplication.AgentUpdater.CheckServer(Servers server)

Does anybody have a clue of how we can fix or prevent this?

Thank you in advance and have a nice day!

Kind regards,

Nick

Product: BuildMaster
Version: 4.9.10

I suspect the two messages are unrelated... but unfortunately it's really hard to know what would cause the first problem. 99% of the time, especially over long-running things like this, it's a result of problematic network connections.

The new Inedo Agents (available in v5) are a bit more resilient to this.