My startup.conf :

unix

{     interactive         nodaemon         cli-listen  /run/vpp/cli.sock         cli-no-pager         poll-sleep-usec 100 }

api-trace

{         on }

api-segment

{         gid vpp }

socksvr

{         default }

cpu

{     main-core 1     corelist-workers 2,3 }

dpdk

{         uio-driver vfio-pci     vdev crypto_aesni_mb0,max_nb_queue_pairs=2,socket_id=0         dev 0000:02:05.0 \{ name G0}

}

plugins

{         plugin ikev2_plugin.so \{ disable }

}

nat

{         endpoint-dependent }

My config is shown below:

set int state G0 up
set dhcp client intfc G0
set interface nat44 out G0 output-feature
nat44 add interface address G0
nat44 forwarding enable

assertion error is below:

DBGvpp# 1: /root/work/vpp-master/src/plugins/nat/out2in_ed.c:451 (create_bypass_for_fwd) assertion `thread_index == ed_value_get_thread_index (&value)' fails

 

Program received signal SIGABRT, Aborted.

[Switching to Thread 0x7fff3bfff700 (LWP 51834)]

0x00007ffff546c387 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:55

55        return INLINE_SYSCALL (tgkill, 3, pid, selftid, sig);

Missing separate debuginfos, use: debuginfo-install krb5-libs-1.15.1-37.el7_7.2.x86_64 libcom_err-1.42.9-16.el7.x86_64 mbedtls-2.7.16-2.el7.x86_64 pkcs11-helper-1.11-3.el7.x86_64

(gdb) bt

#0  0x00007ffff546c387 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:55

#1  0x00007ffff546da78 in __GI_abort () at abort.c:90

#2  0x000000000040858e in os_panic () at /root/work/vpp-master/src/vpp/vnet/main.c:371

#3  0x00007ffff620daa6 in debugger () at /root/work/vpp-master/src/vppinfra/error.c:84

#4  0x00007ffff620de91 in _clib_error (how_to_die=2, function_name=0x0, line_number=0, 

    fmt=0x7fffaff07040 "%s:%d (%s) assertion `%s' fails") at /root/work/vpp-master/src/vppinfra/error.c:143

#5  0x00007fffafdb058d in create_bypass_for_fwd (sm=0x7fffaff68ec0 <snat_main>, b=0x10026d68c0, 

    ip=0x10026d69ce, rx_fib_index=0, thread_index=1) at /root/work/vpp-master/src/plugins/nat/out2in_ed.c:451

#6  0x00007fffafdb0a54 in create_bypass_for_fwd_worker (sm=0x7fffaff68ec0 <snat_main>, b=0x10026d68c0, 

    ip=0x10026d69ce, rx_fib_index=0) at /root/work/vpp-master/src/plugins/nat/out2in_ed.c:521

#7  0x00007fffafdb2ca2 in nat44_ed_out2in_slow_path_node_fn_inline (vm=0x7fffb7312cc0, node=0x7fffb76618c0, 

    frame=0x7fffb75a07c0) at /root/work/vpp-master/src/plugins/nat/out2in_ed.c:1205

#8  0x00007fffafdb36c1 in nat44_ed_out2in_slowpath_node_fn_hsw (vm=0x7fffb7312cc0, node=0x7fffb76618c0, 

    frame=0x7fffb75a07c0) at /root/work/vpp-master/src/plugins/nat/out2in_ed.c:1407

#9  0x00007ffff7edec68 in dispatch_node (vm=0x7fffb7312cc0, node=0x7fffb76618c0, type=VLIB_NODE_TYPE_INTERNAL, 

    dispatch_state=VLIB_NODE_STATE_POLLING, frame=0x7fffb75a07c0, last_time_stamp=2247957037122854)

    at /root/work/vpp-master/src/vlib/main.c:1194

#10 0x00007ffff7edf372 in dispatch_pending_node (vm=0x7fffb7312cc0, pending_frame_index=1, 

    last_time_stamp=2247957037122854) at /root/work/vpp-master/src/vlib/main.c:1353

#11 0x00007ffff7ee13be in vlib_main_or_worker_loop (vm=0x7fffb7312cc0, is_main=0)

    at /root/work/vpp-master/src/vlib/main.c:1848

#12 0x00007ffff7ee1e40 in vlib_worker_loop (vm=0x7fffb7312cc0) at /root/work/vpp-master/src/vlib/main.c:1982

#13 0x00007ffff7f22e62 in vlib_worker_thread_fn (arg=0x7fffb4124e00)

    at /root/work/vpp-master/src/vlib/threads.c:1861

#14 0x00007ffff622c870 in clib_calljmp () at /root/work/vpp-master/src/vppinfra/longjmp.S:123

#15 0x00007fff3bffebb0 in ?? ()

#16 0x00007ffff7f1ca52 in vlib_worker_thread_bootstrap_fn (arg=0x7fffb4124e00)

    at /root/work/vpp-master/src/vlib/threads.c:585

Backtrace stopped: previous frame inner to this frame (corrupt stack?)

(gdb) 

without "nat44 forwarding enable", no above assertion failed.
or 
without  "corelist-workers 2,3" in startup.conf, no above assertion failed