article Stream are not visible or available on the hub in Qlik Sense May 2022 in Official Support Articles

Stream are not visible or available on the hub in Qlik Sense May 2022

Benoit_C — Fri, 22 Sep 2023 07:26:25 GMT

After upgrading or installing Qlik Sense Enterprise on Windows May 2022, users may not see all of their streams.

The streams appear only after an interaction or a click anywhere on the Hub.

This is caused by defect QB-10693, resolved in May 2022 Patch 4.

Environment

May 2022

Workaround

To work around the issue without a patch:

Locate and open the file: C:\Program Files\Qlik\Sense\CapabilityService\capabilities.json
Modify the following line:

{"contentHash":"2ae4a99c9f17ab76e1eeb27bc4211874","originalClassName":"FeatureToggle","flag":"HUB_HIDE_EMPTY_STREAMS","enabled":true}

Set it from true to false:

{"contentHash":"2ae4a99c9f17ab76e1eeb27bc4211874","originalClassName":"FeatureToggle","flag":"HUB_HIDE_EMPTY_STREAMS","enabled":false}
Save the file.

If you have a multi node, these changes need to be applied on all nodes.

Note 2: As these are changes to a configuration file, they will be reverted to default when upgrading. The changes will need to be redone after patching or upgrading Qlik Sense.
Restart the Qlik Sense Dispatcher service AND the Qlik Sense Proxy Service

Note: If you have a multi node, all nodes need to be restarted.

Fix

A fix is available in May 2022, patch 4.

Streams will show up (after a few seconds) without the need to click or interact with the hub.

Important NOTE about feature HUB_HIDE_EMPTY_STREAMS:

When you activate HUB_HIDE_EMPTY_STREAMS, you will have an expected delay before all streams appear.

To improve this delay, from Patch 4, you can add HUB_OPTIMIZED_SEARCH (needs to be added manually as a new flag). As of now, HUB_OPTIMIZED_SEARCH tag will be available in the upcoming August 2022 release and is not planned for any patches (yet)

If this delay (seconds) is not acceptable, you will need to disable this HUB_HIDE_EMPTY_STREAMS capability.

Cause

This defect was introduced by a new capability service.

Internal Investigation ID(s)

QB-10693

Re: Stream are not visible or available on the hub in Qlik Sense May 2022

konHi — Thu, 21 Jul 2022 07:39:14 GMT

"When you activate HUB_HIDE_EMPTY_STREAMS, you will have an expected delay before all streams will appear."

What does "Expected" means? Is is technically unavoidable?

Re: Stream are not visible or available on the hub in Qlik Sense May 2022

Benoit_C — Fri, 22 Jul 2022 10:11:25 GMT

Hi @konHi,

Since you have installed patch 4. Now, the stream are loading, but it's not immediate, there is an expected delay.
Expected delay is because the way this new capability is built it can't be improve more than it is (apart of using and activating the below tag).

To improve this delay, from Patch 4, you can add HUB_OPTIMIZED_SEARCH tag.

If the delay is still not acceptable for you, there is no other way than disable HUB_HIDE_EMPTY_STREAMS.

Re: Stream are not visible or available on the hub in Qlik Sense May 2022

konHi — Fri, 22 Jul 2022 10:17:23 GMT

The feature is awesome and is something we waited for a long time. This delay just feels not right at the moment.

Re: Stream are not visible or available on the hub in Qlik Sense May 2022

uwqliker — Mon, 17 Oct 2022 16:21:39 GMT

We have QlikSense Enterprise Windows and this problem occurred with our May 2022 install patch 5, so we installed August 2022 patch 1 and the problem is still there. Will this be added to future patches or has it been fixed in patch 2?

Re: Stream are not visible or available on the hub in Qlik Sense May 2022

uwqliker — Mon, 17 Oct 2022 16:23:31 GMT

Audit of the streams in the QMC shows the user has access, but when they open the hub, some of their streams are missing

Re: Stream are not visible or available on the hub in Qlik Sense May 2022

Ken_T — Mon, 17 Oct 2022 16:44:23 GMT

A few questions:
what determines what list of streams initially shows up?

what determines what part of the list of streams shows up after the delay?

If we add HUB_OPTIMIZED_SEARCH and set it to true, as a feature toggle -- should this improve the delay for the other streams to show up? Does this have to be done in conjunction with turning off HUB_HIDE_EMPTY_STREAMS? I am unclear on what each part does.

We have turned off HUB_HIDE_EMPTY_STREAMS, and we still see the same behavior as before, where a few streams are listed fast and then some 30 - 60 seconds later, the remaining streams are shown. We expected with this turned off it should be back to pre-May 2022 behavior, but it did not.

We are going to try :
HUB_HIDE_EMPTY_STREAMS set to false and
HUB_OPTIMIZED_SEARCH set to true
to see if this helps.

we have had several users complain about this and think that the app is broken.

Could qlik consider adding some on screen indication that the page is trying to determine what streams to display to the user?

Re: Stream are not visible or available on the hub in Qlik Sense May 2022

Ken_T — Mon, 17 Oct 2022 18:05:08 GMT

we found that setting HUB_HIDE_EMPTY_STREAMS to false resolved the issue. (we did not use HUB_OPTIMIZED_SEARCH, not sure what that does) In multi-node we had to stop and start all services for this change to take effect. After setting HUB_HIDE_EMPTY_STREAMS to false we saw no mode delay for the full list of streams. They all loaded together, no delays.

restart order:
https://community.qlik.com/t5/Official-Support-Articles/Manual-Start-and-Stop-order-of-Qlik-Sense-services/ta-p/1713773

This feature needs to have some visual indication to users, otherwise folks will assume there is an issue with their access to streams, as nothing indicates the page is trying to show the full list of all streams.

Re: Stream are not visible or available on the hub in Qlik Sense May 2022

Benoit_C — Tue, 18 Oct 2022 06:48:42 GMT

Hello @Ken_T ,

With HUB_HIDE_EMPTY_STREAMS activated the delay is expected, it's how is designed the feature.

If you activate HUB_OPTIMIZED_SEARCH, delay will be better but there will still have a delay.

If delay is not acceptable the only solution would be to disable it.

To have the modification be effective, you need to restart the Dispatcher service and the Proxy service.

Re: Stream are not visible or available on the hub in Qlik Sense May 2022

uwqliker — Wed, 19 Oct 2022 19:19:44 GMT

I second Ken_T 's experience/assessment. We also disabled the HUB_HIDE_EMPTY_STREAMS and restarted all services on all nodes and things seem back to normal.

Re: Stream are not visible or available on the hub in Qlik Sense May 2022

JHuis — Wed, 04 Jan 2023 08:48:02 GMT

Dear Benoit,

we have two root admin users. One users loads streams slowly and the other one fast.

The one where is loads fast is the owner of the apps.

Is this also the same problem?

Re: Stream are not visible or available on the hub in Qlik Sense May 2022

Benoit_C — Wed, 04 Jan 2023 09:47:24 GMT

Hello JHuis,

Your issue doesn't not seem to be related, it is probably a specific issue within your configuration.

Re: Stream are not visible or available on the hub in Qlik Sense May 2022

uwqliker — Fri, 06 Jan 2023 13:29:29 GMT

We've upgraded to Enterprise on premise August 2022 Patch 5, and the problem seems to be reoccurring, although sporadic and infrequent.

do we need to set the HUB_HIDE_EMPTY_STREAMS to false every time we upgrade?

Re: Stream are not visible or available on the hub in Qlik Sense May 2022

Benoit_C — Mon, 09 Jan 2023 09:02:52 GMT

Hi @uwqliker,

Each time you'll perform a Qlik Sense upgrade/migration the config files will be overwritten. During upgrade, configuration files are overwritten with the default settings. If a configuration file was manually changed in your previous deployment, you must make sure to restore your customized settings after the upgrade.

Regards,

Benoit

Re: Stream are not visible or available on the hub in Qlik Sense May 2022

uwqliker — Mon, 09 Jan 2023 13:44:48 GMT

So there isn't there a way to change the default permanently? Does this mean we need to change it every time there is a patch as well - not just on new versions?

I'm not sure why it would be necessary to hide empty streams anyway. Having users missing streams is a far bigger problem than showing an empty stream. I can always hide a stream through a security rule or just not create it until there's content for the stream.

Do you have any more permanent fixes/workarounds that don't require manual workarounds?

Re: Stream are not visible or available on the hub in Qlik Sense May 2022

Benoit_C — Mon, 09 Jan 2023 13:48:36 GMT

There is no way to permanently change this setting as it's now the default setting.

Those steps are described in the upgrade process help page:

https://help.qlik.com/en-US/sense-admin/May2021/Subsystems/DeployAdministerQSE/Content/Sense_DeployAdminister/QSEoW/Deploy_QSEoW/Upgrading.htm

Re: Stream are not visible or available on the hub in Qlik Sense May 2022

uwqliker — Mon, 09 Jan 2023 19:59:15 GMT

Hi Benoit,

So are you saying Patches will overwrite all configuration type files the same as installing a new release would?

If I'm on August 2022 Patch 5 and run Patch 6, I have to re-create the capabilities.json file? Just like I would if I were going to a new release (for example December 2022).

Re: Stream are not visible or available on the hub in Qlik Sense May 2022

Ken_T — Mon, 09 Jan 2023 20:47:26 GMT

there are some things that get over-written by patch install, I think my team has a list of some somewhere. That would make a very good new post / new topic / new question, to see if Qlik could give some guidance about the types of workarounds and changes that are not carried forward and are overwritten by patch installs and/or upgrades.

This would be a very nice helpful add to all of the existing docs and posts, if there is a workaround /change provided, if Qlik could indicate if this is something will need to be re-done after patch/upgrade.

random totally unrelated example, I believe the setting for allow-nonselect-queries is one that we routinely have to re-do after patch installs. (in the configuration file QvOdbcConnectorPackage.exe.config).

Re: Stream are not visible or available on the hub in Qlik Sense May 2022

Benoit_C — Tue, 10 Jan 2023 08:10:20 GMT

Hi @uwqliker,

If you install August 2022 patch 6, yes capabilities.json will lose all your customizations.

Re: Stream are not visible or available on the hub in Qlik Sense May 2022

Sonja_Bauernfeind — Tue, 10 Jan 2023 08:45:48 GMT

@Ken_T Thank you for your feedback, Ken! And you are correct, these notes should be included in the articles, and, in this case, we have failed to do so.

I have added a note to the article now and will keep an eye out for other articles as they pass my review to adjust them accordingly.

All the best,
Sonja