Application Objects don't update in AppEngine

Hi experts,

In one semicon project ,we met a very strange issue of system platform 2020 R2 sp1 . The value of  application object in AppEngine doesn't update .

The customer didn't find this issue until they checked the trend of one application object,the data didn't change for a long time.

But everything looks good in object viewer.

We asked help for L2 ,and they gave us a solution:

The steps are as below:

1,Undoploy the AppEngine

2,Delete the cache file in c:\program data\achestra\cache

3,Deploy the AppEngine.

It looks like the issue has been resolved for now.

But the customer raised a question :if the issue happens again ,how to generate an alarm or a prompt to notify the operator?

we can't find find a good solution so far,because the quality of the object is good ,and the status of the AppEngine is good as well.

Any suggestion about this question?

Thanks in advanced.

BR,

Zhen Shang

  • Hi, i have seen and dealt with this issue, there are couple of things to see

    1) App Engine to Historian comms ( is this domain based or local based network security ? 

    2) Redundant DI Object, is one of DI objects causing this?

    3) App Engine swap over, is this because of an App engine swap ?

    You should see the issues pop in the Historian logs or App engine operations management log 

    Lastly make sure all the systems have the same security update and there are no pending security install updates