NSO RESTCONF API call returning incomplete response

[miguelmendesjorge]

Hi,

I have been experimenting the NSO RESTCONF API through Postman with some real devices connected and configured to it. However, I have noticed that some responses come incomplete and do not close the XML/JSON response tags.

For example, when I do a GET request to my ISR4451 device:

http://localhost:8080/restconf/data/tailf-ncs:devices/device=ISR4451?content=nonconfig

It only returns:

<device xmlns="http://tail-f.com/ns/ncs"  xmlns:ncs="http://tail-f.com/ns/ncs">
    <name>ISR4451</name>
    <commit-queue>
        <queue-length>0</queue-length>
    </commit-queue>
    <active-settings>
        <connect-timeout>20</connect-timeout>
        <read-timeout>20</read-timeout>
        <write-timeout>20</write-timeout>
        <ssh-keep-alive>
            <interval>20</interval>
            <count>3</count>
        </ssh-keep-alive>
        <ned-keep-alive>
            <count>3</count>
        </ned-keep-alive>
        <connect-retries>
            <attempts>0</attempts>
            <timeout>3</timeout>
        </connect-retries>
        <trace>false</trace>
        <trace-output>file</trace-output>
        <ned-settings>
            <use-junos-rollback>false</use-junos-rollback>
        </ned-settings>
        <commit-queue>
            <enabled-by-default>false</enabled-by-default>
        </commit-queue>
        <session-limits>
            <max-sessions>unlimited</max-sessions>
        </session-limits>
        <session-pool>
            <idle-time>30</idle-time>
        </session-pool>
        <no-overwrite>
            <enabled-by-default>false</enabled-by-default>
        </no-overwrite>
        <lsa>
            <no-overwrite>
                <enabled-by-default>false</enabled-by-default>
            </no-overwrite>
        </lsa>
        <out-of-sync-commit-behaviour>reject</out-of-sync-commit-behaviour>
    </active-settings>
    <state>
        <oper-state>unknown</oper-state>
        <transaction-mode>running-only</transaction-mode>
        <last-transaction-id>1827-381726-6237</last-transaction-id>
        <last-modules-state>
            <module xmlns="http://tail-f.com/ns/ncs/devices-yang-library">

It seems there is a lot of information missing. It just stops at the <module> tag and does not send the rest of it.

Am I missing something? Is this a bug?

Thank you.

[gmuloche]

Hello,

The truncated output indeed does not look right.

could you please indicate which NSO version you are using?

Is it happening both for XML and JSON for the same command?

Do you see any log when this occur?

I am aware of some recent corrections for instance in NSO 5.5 CHANGES file:

    167   - restconf: In certain circumstances it was possible that elements were
    168     dropped for the XML output format. Now elements are not dropped and are
    169     emitted as expected.
    170
    171     (ENG-21816, RT:38276, PS-33345, SR:687136729)