Return on failure to acquire a semaphore

CHANGELOG.md

@@ -1,3 +1,6 @@
+Development
+  - do not continue if attempt to acquire a semaphore fails
+
 0.6.1
   - update documentation for account managers, explaining the difference between Dirk and wallet
   - add submitter configuration to documentation

services/beaconcommitteesubscriber/standard/service.go

@@ -181,6 +181,7 @@ func (s *Service) calculateSubscriptionInfo(ctx context.Context,
 					defer wg.Done()
 					if err := sem.Acquire(ctx, 1); err != nil {
 						log.Error().Err(err).Msg("Failed to obtain semaphore")
+						return
 					}
 					defer sem.Release(1)
 					subscriptionInfoMutex.RLock()