private async Task <bool> TryRecycle([NotNull] IManagedProcess managedProcess,
[CanBeNull] ServiceRegistrar serviceRegistrar)
{
_logger.LogInformation("The process {process} is due for recycling.", managedProcess);
int?ongoingRequests = await managedProcess.GetOngoingRequestCountAsync();
if (ongoingRequests > 0)
{
_logger.LogWarning(
"Process recycling is delayed due to one or more ongoing requests being processed.");
return(false);
}
// TODO: Send shutdown signal (that sets unhealthy = true and then waits another few seconds before shutting down to avoid races)
await ManagedProcessUtils.ShutDownAsync(managedProcess, serviceRegistrar,
TimeSpan.Zero);
// However, the advantage of killing is that we can re-start it straight away:
bool success = await managedProcess.StartAsync();
if (success &&
managedProcess is IServerProcess serverProcess)
{
serviceRegistrar?.Ensure(serverProcess);
}
return(success);
}
private async Task <bool> CareForUnhealthy(IManagedProcess process)
{
// TODO: Consider adding a new process while still shutting down, but only if ephemeral ports are used
_logger.LogInformation("(Re-)starting process with status 'not serving': {process}",
process);
string message =
await ManagedProcessUtils.ShutDownAsync(process, ServiceRegistrar,
MemberMaxShutdownTime);
if (!string.IsNullOrEmpty(message))
{
_logger.LogDebug(message);
}
if (process.StartupFailureCount > MemberMaxStartupRetries)
{
_logger.LogWarning("Startup retries have been exceeded. Not starting {process}",
process);
return(false);
}
return(await TryStart(process));
}