[BUG] Failed to fetch error on Discover page

[saketmht]

Describe the bug

We have OS and OSD setup on k8s with Keycloak. The OSD Discover page seems to work fine for around 30 mins before it starts giving failed to fetch error when using the search. We have to refresh the page everytime to get it back to normal and after a while again the same issue happens.

TypeError: Failed to fetch
    at Fetch._callee3$ (https://osd.vmi.system.shoe.v8o.com/34/bundles/core/core.entry.js:15:583674)
    at tryCatch (https://osd.vmi.system.shoe.v8o.com/34/bundles/plugin/indexManagementDashboards/indexManagementDashboards.plugin.js:1:138399)
    at Generator.invoke [as _invoke] (https://osd.vmi.system.shoe.v8o.com/34/bundles/plugin/indexManagementDashboards/indexManagementDashboards.plugin.js:1:142350)
    at Generator.throw (https://osd.vmi.system.shoe.v8o.com/34/bundles/plugin/indexManagementDashboards/indexManagementDashboards.plugin.js:1:139538)
    at fetch_asyncGeneratorStep (https://osd.vmi.system.shoe.v8o.com/34/bundles/core/core.entry.js:15:577704)
    at _throw (https://osd.vmi.system.shoe.v8o.com/34/bundles/core/core.entry.js:15:578112)

This issue is mostly seen with larger indices.

To Reproduce
Steps to reproduce the behavior:

1. Go to Discover page
2. Perform some searches
3. After 30-60mins
4. See error

Expected behavior
A clear and concise description of what you expected to happen.

OpenSearch Version
2.3.0

Dashboards Version
2.3.0

Plugins

Please list all plugins currently enabled.

Screenshots

Host/Environment (please complete the following information):

• OS: [e.g. iOS]
• Browser and version [e.g. 22]

Additional context

Add any other context about the problem here.

[huyaboo]

So after the 30 minutes, if you refreshed the page, are you forced to reauthenticate? If yes, its likely that your session has timed out.