DPDK: Some flows stuck indefinitely

[Vinod Nair]

After running traffic see that a few flows are stuck for ever,,
Don't know what led to this

flow -l
Flow table(size 68157440, entries 532480)

Entries: Created 3240990966 Added 3206278886 Processed 3240990966 Used Overflow entries 0
(Created Flows/CPU: 0 0 0 0 0 0 0 0 0 0 0 1239366055 1237319978 764304933)(oflows 0)

Action:F=Forward, D=Drop N=NAT(S=SNAT, D=DNAT, Ps=SPAT, Pd=DPAT, L=Link Local Port)
 Other:K(nh)=Key_Nexthop, S(nh)=RPF_Nexthop
 Flags:E=Evicted, Ec=Evict Candidate, N=New Flow, M=Modified Dm=Delete Marked
TCP(r=reverse):S=SYN, F=FIN, R=RST, C=HalfClose, E=Established, D=Dead

    Index Source:Port/Destination:Port Proto(V)
-----------------------------------------------------------------------------------
      517<=>517503 192.169.195.218:42796 6 (1)
                         145.11.0.13:80
(Gen: 124, K(nh):25, Action:F, Flags:EcM, TCP:SSrEErFFrCD, QOS:-1, S(nh):29, Stats:5/453, SPort 55955)

    11536<=>484556 192.169.171.221:55480 6 (1)
                         145.11.0.13:80
(Gen: 32, K(nh):25, Action:F, Flags:EcM, TCP:SSrEErFFrCD, QOS:-1, S(nh):29, Stats:5/453, SPort 62162)

    33466<=>164983 192.169.81.27:48104 6 (1)
                         145.11.0.14:80
(Gen: 89, K(nh):13, Action:F, Flags:EcM, TCP:SSrEErFFrCD, QOS:-1, S(nh):29, Stats:5/453, SPort 50034)

   187857<=>169286 192.169.61.204:36590 6 (1)
                         145.11.0.13:80
(Gen: 238, K(nh):25, Action:F, Flags:EcM, TCP:SSrEErFFrCD, QOS:-1, S(nh):29, Stats:5/453, SPort 53803)

   304237<=>54430 192.169.98.251:62567 6 (1)
                         145.11.0.14:80
(Gen: 199, K(nh):13, Action:F, Flags:EcM, TCP:SSrEErFFrCD, QOS:-1, S(nh):29, Stats:5/453, SPort 54535)

GCORE in : /cs-shared/bugs/1604112
version: 3.1.0.0-2~mitaka

[Hari Prasad Killi (haripk)]

Issue not seen after the R3.0 flow fixes.