# Do not know how to run the 5-stats example under examples.confd **URL:** \ **Category:** General\ **Created:** [July 13, 2022, 7:30am UTC](https://dmap-community.ductus.global/t/do-not-know-how-to-run-the-5-stats-example-under-examples-confd/4140 "2022-07-13T07:30:52Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![fourwillings](https://avatars.discourse-cdn.com/v4/letter/f/e9c0ed/32.png) [@fourwillings](https://dmap-community.ductus.global/u/fourwillings)\ **Post date:** [July 13, 2022, 7:30am UTC](https://dmap-community.ductus.global/t/do-not-know-how-to-run-the-5-stats-example-under-examples-confd/4140/1 "2022-07-13T07:30:52Z")
Hi all, I am wondering how to run the **5-stats** example (Example #5: Read-only Instrumentation) under confd-7.8.2/examples.confd/intro/python/5-stats. I followed the instruction in the README file, and below is what I got: **First I built necessary files and started confD** ```auto [user@machine 5-stats]$ make all start /home/user/confd-7.8.2/bin/confdc --fail-on-warnings -c -o arpe.fxs arpe.yang /home/user/confd-7.8.2/bin/confdc --emit-python arpe_ns.py arpe.fxs mkdir -p ./confd-cdb cp /home/user/confd-7.8.2/var/confd/cdb/aaa_init.xml ./confd-cdb ln -s /home/user/confd-7.8.2/etc/confd/ssh ssh-keydir Build complete ### Killing any confd daemon and ARP confd agents /home/user/confd-7.8.2/bin/confd --stop || true killall `pgrep -f "python3 ./arpstat.py"` || true 84412: no process found 84413: no process found /home/user/confd-7.8.2/bin/confd -c confd.conf --addloadpath /home/user/confd-7.8.2/etc/confd ### * In one terminal window, run: tail -f ./confd.log ### * In another terminal window, run queries ### (try 'make query' for an example) ### * In this window, the arpstat confd daemon now starts: ### (hit Ctrl-c to exit) python3 ./arpstat.py _confd.TRACE 2 TRACE Connected (maapi) to ConfD TRACE Connected (dp) to ConfD TRACE Received daemon id 0 TRACE Connected (dp) to ConfD TRACE MAAPI_LOAD_ALL_NS TRACE MAAPI_LOAD_MNS_MAPS TRACE MAAPI_LOAD_HASH_DB TRACE Picked up old user session: 12 for user:system ctx:system TRACE Picked up old user session: 11 for user:system ctx:system TRACE Picked up old user session: 5 for user:system ctx:system TRACE Picked up old user session: 1 for user:system ctx:system ``` **Then I started JunOS-style CLI in another terminal, and typed _show status arpentries_, but got an error** ```auto [user@rtxdoclp121 5-stats]$ make cli /home/user/confd-7.8.2/bin/confd_cli --user=admin --groups=admin \ --interactive || echo Exit admin connected from 168.127.214.38 using ssh on rtxdoclp121 admin@rtxdoclp121> show status arpentries Error: application protocol error [error][2022-07-13 02:30:44] admin@rtxdoclp121> System message at 2022-07-13 02:30:44... Subsystem stopped: arpe_daemon ``` And below is the error message I saw in the terminal I started confD ```auto TRACE New user session: 14 for user:admin ctx:cli --> CONFD_OK TRACE CALL trans init(thandle=12,mode="r",db=running)Traceback (most recent call last): File "./arpstat.py", line 117, in cb_init arp.collect_arp_data() # get self.arpdata File "./arpstat.py", line 69, in collect_arp_data iface = arp_line[i+1].strip() IndexError: list index out of range --> CONFD_OK DEBUG No descriptor set for trans Traceback (most recent call last): File "./arpstat.py", line 259, in run() File "./arpstat.py", line 241, in run raise e File "./arpstat.py", line 238, in run dp.fd_ready(ctx, ctlsock) # _confd.error.Error: Bad protocol usage or unexpected retval (21): No descriptor set for trans make: *** [start] Error 1 ``` Does anyone know how to resolve this? ---
**Author:** ![josephm](https://avatars.discourse-cdn.com/v4/letter/j/a88e57/32.png) [@josephm](https://dmap-community.ductus.global/u/josephm)\ **Post date:** [July 13, 2022, 8:41am UTC](https://dmap-community.ductus.global/t/do-not-know-how-to-run-the-5-stats-example-under-examples-confd/4140/2 "2022-07-13T08:41:23Z")
It looks like the example’s Python code does not correctly handle the output of `arp` command on your system for whatever reason → could be missing arp command, different than assumed textual output etc. As you refer to Python example that is part of ConfD Premium, my guess is most straightforward & effective way will be to open a ticket via your support channel… ---
**Author:** ![cohult](https://yyz2.discourse-cdn.com/flex010/user_avatar/dmap-community.ductus.global/cohult/32/221_2.png) [@cohult](https://dmap-community.ductus.global/u/cohult)\ **Post date:** [July 13, 2022, 3:07pm UTC](https://dmap-community.ductus.global/t/do-not-know-how-to-run-the-5-stats-example-under-examples-confd/4140/3 "2022-07-13T15:07:22Z")
> [@fourwillings](#): > > Does anyone know how to resolve this? As you can see in the `arpstat.py` example, it uses the arp command to get the existing arp entries: ```python self.fp = subprocess.Popen(["arp", "-an"], stdout=subprocess.PIPE, universal_newlines=True) ``` What output do you get if you run ```plaintext $ arp -an ``` …on your system? And what OS, distribution, and version are you using? ---
**Author:** ![fourwillings](https://avatars.discourse-cdn.com/v4/letter/f/e9c0ed/32.png) [@fourwillings](https://dmap-community.ductus.global/u/fourwillings)\ **Post date:** [July 14, 2022, 1:46pm UTC](https://dmap-community.ductus.global/t/do-not-know-how-to-run-the-5-stats-example-under-examples-confd/4140/4 "2022-07-14T13:46:48Z")
Hi, I think it is solved now. Need to change ```auto if arp_line[1] == "incomplete": for elem in arp_line[1:]: i += 1 if elem == "on": break ``` to ```auto if arp_line[1] == "incomplete": for elem in arp_line[1:]: if elem == "on": break i += 1 ```