getServiceDelegate () error in WF/BG

Hi,

sometimes, i have an error on account of the init of my WF

getServiceDelegate is called before any app init:

it gives me this on console(just after running my WF) :

Error: Unhandled Exception
Exception: UnexpectedTypeException: Expected Object/Array/Dictionary/ByteArray, given null
Stack:
- launchStockRequest() at E:\...\WebRequest.mc:64 0x100009f2
- initialize() at E:\...WebRequest.mc:352 0x10001ad7
- getServiceDelegate() at E:\...CubeWatchApp.mc:182 0x100007f6

****getInitialView =****
in userSettings :
***enter onShow..
*** exit onShow..
Background: ****background Init ****true
Background: **** initialize**** TOTAL MEM28688
Background: **** initialize**** USED MEM21592
Background: **** initialize**** FREE MEM7096

Probably logical to have an error if no init is made, but how can this happen, and how can i avoid this pb?

May it be some BG process still running in mem ?

Thanks

Marco

Top Replies

jim_m_58 over 4 years ago in reply to Marco +1

initialize() can be called for things other than temporal events, so if you're doing something specific to a temporal event, do it in onTemporalEvent()

All Replies

jim_m_58 over 4 years ago

getServiceDelegate is called by the background when the background starts.

That can include when the background doesn't run due to a temporal event, and two cases are when an app is first installed or updated - onAppInstall() and onAppUpdate() would also be called, and that sounds like what you are seeing.

Sounds like you might be doing things in initialize() that you should be doing in onTemperoalEvent()

Marco over 4 years ago in reply to jim_m_58

Thanks.

Probably something like onAppInstall, since i just deleted all apps in simu and restarting my app.

But i have nothing in :

function onAppInstall() {

//       Sys.println("onAppUpdate");
//       App.onAppInstall();
    }

    function onAppUpdate() {
//       Sys.println("onAppUpdate");
//       App.onAppInstall();
    }

and in initialize() :    }

    function initialize() {
       AppBase.initialize();
    }

jim_m_58 over 4 years ago in reply to Marco

what do you have in getServiceDelegate()?

Marco over 4 years ago in reply to jim_m_58

this :

    function getServiceDelegate(){
        return [new WebRequestServiceDelegate()];
    }

jim_m_58 over 4 years ago in reply to Marco

so where is launchStockRequest() being called from?

Marco over 4 years ago in reply to jim_m_58

laucnhStockRequest is called from within WebRequestServiceDelegate,

in makeWebRequest, to test if makets are closed or not (to avoid a request for nothing) for this particular stock (can be on Nasdaq/EUR or anywhere..)

Marco over 4 years ago in reply to Marco

it should be a little memory bug in the simu,as it crashes sometimes (java error, freeze, no sync with App Settings Editor, etc).

This error does not have stop the WF, running, so BG just send some error msg .

Thanks for your help Jim.

I now have some work on onShow which seems not to recover my OS (hum, maybe not the fault of onShow!) and with Lat/long that i lost even in OS. (proably i have some job to do with OS !)

Marco over 4 years ago in reply to jim_m_58

Last question of the day :

i had an error, due to the called server.

I made as usual my request, Json format waiting, is ok 99%.

but In the console i saw this :

Error: Unexpected Type Error
Details: failed inside handle_json_callback
Stack:

in HTTP Traffic Stats :

HTTP/1.1 503 Service Unavailable\r\n
Connection: keep-alive\r\n
Server: Cowboy\r\n
Date: Thu, 05 Dec 2019 20:21:11 GMT\r\n
Content-Length: 506\r\n
Content-Type: text/html; charset=utf-8\r\n
Cache-Control: no-cache, no-store\r\n
\r\n
<!DOCTYPE html>\n\t<html>\n\t <head>\n\t\t<meta name="viewport" content="width=device-width, initial-scale=1">\n\t\t<meta charset="utf-8">\n\t\t<title>Application Error</title>\n\t\t<style media="screen">\n\t\t html,body,iframe {\n\t\t\tmargin: 0;\n\t\t\tpadding: 0;\n\t\t }\n\t\t html,body {\n\t\t\theight: 100%;\n\t\t\toverflow: hidden;\n\t\t }\n\t\t iframe {\n\t\t\twidth: 100%;\n\t\t\theight: 100%;\n\t\t\tborder: 0;\n\t\t }\n\t\t</style>\n\t </head>\n\t <body>\n\t\t<iframe src="//www.herokucdn.com/error-pages/application-error.html"></iframe>\n\t </body>\n\t</html>

Any way to provide and "catch" this system error (i manage error codes in onBGdata...) ?

Thanks !

jim_m_58 over 4 years ago in reply to Marco

but from what function in WebRequestServiceDelegate?

Marco over 4 years ago in reply to jim_m_58

function makeRequestFirstStock :

if (launchStockRequest(tStockOne) ) { Comm.makeWebRequest(w3Api, params, options, responseCallback); }

sorry, i answered "in makeWebRequest" it was a too quick answer.

But i have to change my all BG, to reduce memory usage/ BLE usage / battery usage

Now i manage (at leat enough to get my data!) BG, i understand all you adviced me and the threads about this point.