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Gaurav.Soni
Architect

While using a Javascript Agent (with adrum.js) to report custom JS error events via the Agent's API, some users find that their error messages are not being reported.

 

This is usually caused by a missing message or line within the beacon.

 

Example:

 

var errorT = new ADRUM.events.Error();

errorT.url('http://localhost:8080/error');          // Optional
errorT.msg('I am a custom error at line 100');  // Mandatory
errorT.line(100);                                             // Mandatory
errorT.stack('some call stack here');                // Optional
ADRUM.report(errorT);

 

Both the message and the line are required. If either is missing, the Collector will reject the beacon.

Comments
Roel.Beun
AppDynamics Team

Where would the error end up? In a snapshot for a transaction where the given URL is related to?

Nina.Wolinsky
AppDynamics Team

@Roel.Beun Custom error events can be viewed in your Browser Snapshots. In your Controller, go to User Experience --> Select the application --> Browser Snapshots. You can also see them in Session Summaries by going to User Experience --> Select the application -> Sessions --> Select a session. Here's a example:

 

 

 

Custom error event.png

Robert.Desjarlais
New Poster

I am seeing the same problem.  I want my Javascript errors to participate in a health rule, and throw an alert when the javascript errors.  Has anyone gotten this to work?

Abel.Beyene
Explorer

Using the Sessions view is painful and doesn't give you a high level view of all your custom errors. You will need to click on each URL and it may or may not be your error.

 

A better approach I have come across with some help from AppD support team is to use the analytics view and I think that will give you what you want here.

 

  1. In the controller go to Analytics
  2. Click on searches on the left
  3. Add a new search
  4. Write your SQL query to target error messages that you are interested in. E.g. SELECT scripterrordata.message, * FROM browser_records WHERE errortype IS NOT NULL AND scripterrordata.message REGEXP 'SOME_ERROR_MESSAGE.*'
  5.  Change the time range on top right to be whatever you need (1day, 2days etc)

Hope this helps someone as it took a while to get this answer!

 

Kishore.Polsani
New Poster

Where can I see the stack trace added in the script. I don't see it in browser snapshot or ADQL query.

errorT.stack('some call stack here');     

 

Gaurav.Soni
Architect

Hi Kishore,

 

In 4.4 the errorT.stack present but it was not written to show up anywhere in the controller UI. In 4.5 AppDynamics have decided to drop it. 

See, https://docs.appdynamics.com/display/PRO45/Report+Events+with+the+JavaScript+API

 

So as a workaround, try using errorT.msg to push in any error details.

 

Regards,

Gaurav

Hello there ,

With Adrum.js, can an alarm or error code be generated for forwarding a request to a url to a different url?
example malware detection?

Gaurav.Soni
Architect

Hi Halik

 

JS agent can only report error events.

Can you please elaborate on the problem?

 

Regards,

Gaurav

Hi Gaurav ,


it's not a problem, we just want to generate an alarm when a different url is redirected in the malware detection structure.

 

I want to capture the redirected url in adrum.js.

Gaurav.Soni
Architect

Hi Haluk,

 

If you have a BRUM analytics license, then try,

- Create analytics metrics from browser requests events with ADQL filtering such events.

- You can later use the above-defined metric in your Health rule and 

- Define alerts for the Health rule.

 

Regards,

Gaurav

Version history
Last update:
‎10-12-2018 02:33 PM
Updated by: