Close epoller on task stop

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

linux/shim/service.go

@@ -62,6 +62,7 @@ func NewService(config Config, publisher events.Publisher) (*Service, error) {
 type platform interface {
 	copyConsole(ctx context.Context, console console.Console, stdin, stdout, stderr string, wg, cwg *sync.WaitGroup) (console.Console, error)
 	shutdownConsole(ctx context.Context, console console.Console) error
+	close() error
 }
 
 type Service struct {
@@ -146,6 +147,7 @@ func (s *Service) Delete(ctx context.Context, r *google_protobuf.Empty) (*shimap
 		return nil, err
 	}
 	s.deleteProcess(p.ID())
+	s.platform.close()
 	s.events <- &eventsapi.TaskDelete{
 		ContainerID: s.id,
 		ExitStatus:  uint32(p.ExitStatus()),

linux/shim/service_linux.go

@@ -69,6 +69,10 @@ func (p *linuxPlatform) shutdownConsole(ctx context.Context, cons console.Consol
 	return epollConsole.Shutdown(p.epoller.CloseConsole)
 }
 
+func (p *linuxPlatform) close() error {
+	return p.epoller.Close()
+}
+
 // initialize a single epoll fd to manage our consoles. `initPlatform` should
 // only be called once.
 func (s *Service) initPlatform() error {

linux/shim/service_unix.go

@@ -52,6 +52,10 @@ func (p *unixPlatform) shutdownConsole(ctx context.Context, cons console.Console
 	return nil
 }
 
+func (p *unixPlatform) close() error {
+	return nil
+}
+
 func (s *Service) initPlatform() error {
 	s.platform = &unixPlatform{}
 	return nil