docs: protected synchronized void connectionPending()
      {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.entry(this, tc, "connectionPending");
          ++connectAttemptsPending;
          if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled())
              SibTr.debug(this, tc, connectAttemptsPending + " connection attempts now pending");
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.exit(this, tc, "connectionPending");
      }