Unusual broctl netstats reporting with pf_ring

Hi All,

Our Bro is reporting very strange netstats statistics. The drop number is more than twice the link number. Any ideas on what is happening here?

broctl netstats:

Average packet loss as percent across all Bro workers: 251.835667

worker-1-1: 1550022753.774609 recvd=35689158 dropped=86096548 link=35689158

worker-1-2: 1550022753.788585 recvd=34277909 dropped=87669653 link=34277909

worker-1-3: 1550022753.789779 recvd=34412791 dropped=87326521 link=34412791

worker-1-4: 1550022753.794761 recvd=34869235 dropped=86902007 link=34869235

worker-1-5: 1550022753.799623 recvd=34265107 dropped=87488621 link=34265107

worker-1-6: 1550022753.804947 recvd=34060558 dropped=87602513 link=34060558

worker-1-7: 1550022753.814827 recvd=34218781 dropped=87558368 link=34218781

worker-1-8: 1550022753.820166 recvd=34766455 dropped=86960847 link=34766455

worker-1-9: 1550022753.834761 recvd=34332784 dropped=87497148 link=34332784

worker-1-10: 1550022753.835729 recvd=35214323 dropped=86518901 link=35214323

capture_loss.log:

1550021287.104721 900.000010 worker-1-10 272473 425817 63.988286

1550021287.109046 900.000035 worker-1-3 270351 423410 63.850877

1550021287.107021 900.000046 worker-1-7 259620 400463 64.829959

1550021287.114122 900.000029 worker-1-6 245851 376472 65.303927

1550021287.112851 900.000041 worker-1-9 248946 382272 65.12274

1550021287.115733 900.000003 worker-1-1 282999 446957 63.316829

1550021287.234103 900.000051 worker-1-2 265041 413733 64.06088

1550021293.032640 905.925803 worker-1-4 261831 403461 64.896235

1550021296.088983 908.982076 worker-1-8 259122 398183 65.076108

1550021306.079690 918.960314 worker-1-5 251744 384902 65.4047

I have verified Bro is linked to pfring libpcap and pfringclusterid = 21 is in broctl.cfg.