Description

'warm_reboot_multi_sad_inboot' test is failing because "ValueError: invalid literal for int() with base 10" exception on
"verify_route_cnt" function during the test. I have recorded the values during the test of the argument need to be cast to int, sometimes values like this appear and causing the exception:

neigh_ip : -----------
rt_cnt : --------------
neigh_rt_map[neigh_ip] : ----------------

Steps to reproduce the issue:

1. Run 'warm_reboot_multi_sad_inboot'.
2. Observe the exception during the test run.

Describe the results you received:

"======================================================================",
"ERROR: advanced-reboot.ReloadTest",
"----------------------------------------------------------------------",
"Traceback (most recent call last):",
" File "ptftests/advanced-reboot.py", line 509, in setUp",
" self.init_sad_oper()",
" File "ptftests/advanced-reboot.py", line 432, in init_sad_oper",
" log_info, fails = self.sad_handle.verify()",
" File "ptftests/sad_path.py", line 35, in verify",
" self.shandle.verify_route_add(pre_check=pre_check, inboot=inboot)",
" File "ptftests/sad_path.py", line 358, in verify_route_add",
" self.verify_route_cnt(rt_incr, is_up=pre_check)",
" File "ptftests/sad_path.py", line 346, in verify_route_cnt",
" exp_cnt = int(self.neigh_rt_map[neigh_ip]) + rt_incr",
"ValueError: invalid literal for int() with base 10: '--------------'",
"",
"----------------------------------------------------------------------",
"Ran 1 test in 11.002s",
"",
"FAILED (errors=1)"

Describe the results you expected:

Test should pass with no exections.

Additional information you deem important:

**Output of `show version`:**

```

SONiC Software Version: SONiC.201911.215-bd61e381
Distribution: Debian 9.13
Kernel: 4.9.0-11-2-amd64
Build commit: bd61e38
Build date: Mon Oct 12 01:28:02 UTC 2020
Built by: johnar@jenkins-worker-8

Platform: x86_64-mlnx_msn2740-r0
HwSKU: ACS-MSN2740
ASIC: mellanox
Serial Number: MT1719X00480
Uptime: 11:40:58 up 1:44, 1 user, load average: 1.72, 2.39, 2.36

Docker images:
REPOSITORY TAG IMAGE ID SIZE
docker-syncd-mlnx 201911.215-bd61e381 6f6a5c689e07 397MB
docker-syncd-mlnx latest 6f6a5c689e07 397MB
docker-router-advertiser 201911.215-bd61e381 d3070afd0ec8 289MB
docker-router-advertiser latest d3070afd0ec8 289MB
docker-sonic-mgmt-framework 201911.215-bd61e381 e153ee452e42 431MB
docker-sonic-mgmt-framework latest e153ee452e42 431MB
docker-platform-monitor 201911.215-bd61e381 7122bb0727dd 664MB
docker-platform-monitor latest 7122bb0727dd 664MB
docker-fpm-frr 201911.215-bd61e381 11bbafd58a34 335MB
docker-fpm-frr latest 11bbafd58a34 335MB
docker-sflow 201911.215-bd61e381 dd9f81fe35c4 315MB
docker-sflow latest dd9f81fe35c4 315MB
docker-lldp-sv2 201911.215-bd61e381 fb1759df0a8e 312MB
docker-lldp-sv2 latest fb1759df0a8e 312MB
docker-dhcp-relay 201911.215-bd61e381 1e055a4d614d 299MB
docker-dhcp-relay latest 1e055a4d614d 299MB
docker-database 201911.215-bd61e381 751f726626e6 289MB
docker-database latest 751f726626e6 289MB
docker-teamd 201911.215-bd61e381 1bdfd20a4552 314MB
docker-teamd latest 1bdfd20a4552 314MB
docker-snmp-sv2 201911.215-bd61e381 f1163774dbf3 348MB
docker-snmp-sv2 latest f1163774dbf3 348MB
docker-orchagent 201911.215-bd61e381 39b2fea8025c 333MB
docker-orchagent latest 39b2fea8025c 333MB
docker-nat 201911.215-bd61e381 ec0320d1708f 316MB
docker-nat latest ec0320d1708f 316MB
docker-sonic-telemetry 201911.215-bd61e381 4946ad193683 353MB
docker-sonic-telemetry latest 4946ad193683 353MB
```

**Attach debug file `sudo generate_dump`:**

```

sonic_dump_arc-switch1041_20201015_113114.tar.gz
```