When the webhook fired, I could see in the other end, that the body of the request was empty.
I then enabled WP_DEBUG, shot another API-call and checked the log-files ( WooCommerce >> Status >> Logs >> Log-file for the given day ), and could see that it indeed was empty. So it wasn't data 'falling off the truck' on the way to the destination.
I found where the shot was done in the code, and it looked like this:
do_action( 'my_custom_webhook', $order->id, [], $order );
So I changed that to:
error_log( $order );
do_action( 'my_custom_webhook', $order->id, [], $order );
And could see that the $order wasn't empty.
WIERD!
Debugging steps taken
1. Webhooks defined properly
I spent quite a bit of time, diving down into the webhooks, seeing if it was something there, that was setup incorrectly. Or some legacy-code that had been deprecated.
2. Error logs
I dug through the error-logs several time. Assuming that it was some bad code, that encountered an error, before the API-call was sent. But it didn't make any sense, since that most likely would stop the API-call from firing entirely. Hmm!
3. Webhooks deactivating automatically
The API I was hitting, also returned and error 500, when the body was empty. So the webhooks deactivated themselves. Whenever I tried to reactivate them, I still got an error (either of these two):
Error: Delivery URL returned response code: 500
Error: Delivery URL cannot be reached: cURL error 28: Operation tiemd out after 5001 milliseconds with 0 bytes received.
I thought for a long time, that that was centralt to the problem.
But I couldn't get the API changed. So there was no good way around this.
I eventually realized, that even though that I got that error, the the webhook was still activated... And worked!
So I simply ignored that error entirely and moved on.
4. Permissions
I thought that maybe it was something about permissions, since I would see that I got a woocommerce_rest_cannot_view-error.
System details
WordPress-version 5.8.1
WooCommerce-version: 4.9.3
The site is a custom site, that has been built on Trellis, Bedrock and Sage.
The solution was found here: https://github.com/woocommerce/woocommerce/issues/24533#issuecomment-551148570
Simply delete the webhook(s) and create it/them again with the exact same contents.
¯\_(ツ)_/¯
I am trying to make a test transaction using my Laravel 7 app and Authorize.net.
After submitting the sample data, I'm getting:
The element 'createTransactionRequest' in namespace 'AnetApi/xml/v1/schema/AnetApiSchema.xsd' has invalid child element 'clientId' in namespace 'AnetApi/xml/v1/schema/AnetApiSchema.xsd'. List of possible elements expected: 'merchantAuthentication' in namespace 'AnetApi/xml/v1/schema/AnetApiSchema.xsd'.
Anyone know what's causing this error or how to fix it?
Well, I'll answer my own question since it might help others. The problem is the error message in the Authorize.net response is really vague.
Kurt Friars' comment was helpful, since it pointed me in the right direction. As for Mansour Hamcherif's suggestion, the merchantAuthentication object was set in my app, it just didn't have the right values, so it wasn't that.
The solution for me was setting the proper values to setName() and setTransactionKey(). The previous developer who had worked on this project had left values and the credentials had expired. I did a Linux text search for "setTransactionKey", which lead me to the correct PHP file where I need to set:
$merchantAuthentication = new AnetAPI\MerchantAuthenticationType();
$merchantAuthentication->setName('EnterYourLoginNameHere');
$merchantAuthentication->setTransactionKey('EnterYourTransactionKey');
After that, I cleared all of my Laravel app's caches as well as my browser's caches, did a hard reload, tried a transaction again and it worked! I got:
This transaction has been approved., Transaction ID: **********.
You may want to check the log for the raw request, it's likely the merchantAuthentication object has not been set, if you are using the PHP SDK I recommend checking the SimpleCodeConstants.php file and make sure your merchant credentials constants are set.
For example, if I set my merchant credentials to NULL, I get the same E00003 error as a result of sending the following raw request:
{"createTransactionRequest":{"merchantAuthentication":[],"clientId":"sdk-php-2.0.0-ALPHA", ...}
Currently I'm working with the yodlee API. As specified in the documentation the url response may throw InvalidCredentails or UserAccountLocked. I'm using PHP and I get the following response when the username or password is incorrect.
{
Error: [
{
errorDetail: "Invalid Cobrand Credentials"
}
]
}
So to check if the error occurs I want to write some code that checks if errorDetail has a value of Invalid Cobrand Credentials.
So far ok.
But the there may be so many types of errors, and each error name is different. My question is: Can I get the list of these errorDetail values
so that I can make it work without checking if the code is forcebly throwing the errors.
You can just check for the Error index and access it's value for throwing the errors. Something like this should work for you (not tested). From the repo page:
yodleeAPI.getAccounts(accessToken)
.then(function(response) {})
.catch(function(error) {});
Edit:
As far as I could tell there wasn't any exception list. So you're either going to have to go through all the exceptions manually or create a generic error message for users. I would just advice to catch the exception message and use that for the user view(if there isn't any security information in there). You can accomplish that by following the above code.
If you do feel the need to go through every exception yourself I managed to at least get the list of all methods that throw exceptions (search: exception). You'll have to go through it yourself, and parse the error message yourself. But you can find that here
While I am testing my application, I find out every time I after update the data to the database. A annoying fault message is popup.
Which is said
Channel disconnected before an acknowledgement was received
I check the database, test the php script, check the network monitor, even rewrite the service caller (dont know what its name)
<dataservice:DataService id="dataservice2" fault="Alert.show(event.fault.faultString + '\n' + event.fault.faultDetail + '\n' + 'dataservice')" showBusyCursor="true"/>
And even create a new application just to test that component. But, every things are working and the database had received correct data set and I still cannot Identity where that message is come form.
How can I find the source of this message???
I found out the error cause by the PHP script. While I look at the PHP error log file, I found out Flex is not displaying the variable reference error which is like this
PHP Strict Standards: Only variables should be passed by reference in C:\xampp\htdocs\fypweee_admin\FYPadminSideV3-debug\services\StockproductService.php on line 238
If you are using XAMPP, the error log file will be at [your hard disk name]:\xampp\php\logs1.
Since the php script still mysteriously dispatch the data set to the database and I think I will leave that error (for now).
1.put the folders inside your project
(i).flex-spreadsheet(folder)
(ii).amfphp-spreadsheet(folder)
2.Then open the file
for xamp=> \htdocs\projectname\flex-spreadsheet\properties\ApplicationSettings.properties
for wamp=> \www\projectname\flex-spreadsheet\properties\ApplicationSettings.properties
3.Make the first line as
serverpath=http://192.xxx.x.xxx/projectname/amfphp-spreadsheet/gateway.php
**or**
serverpath=localhost/projectname/amfphp-spreadsheet/gateway.php
This works for me.
I have found that one common reason for the error is an exception being thrown from within an exception handler. I'm quite sure this doesn't happen in the application I'm trying to debug... But I've put all the initialization processing lines at the top of index.php in a try/catch.*
It can apparently also happen because some things cannot be serialized to be stored in a session. At most this application stores arrays into the session (quite a bit), but I'm confident that it doesn't store anything too out of the ordinary in it.
Someone commented that it happened to them because their primary key needed to be CHAR(32) instead of INT(11). The PK's in this app are all INTs.
Other suggestions are that it could be a problem with PHP 5.3.3 fixed in 5.3.6, full disk, and a need to typecast a SimpleXML value. We do happen to be running PHP 5.3.3, but upgrading would have to be a last resort in this case. It hasn't always been doing this.
UPDATE/NOTE: I actually can't reproduce the error myself, only see it happening in the logs, see below paragraph for where I believe the error is happening...
* From the error logs, it seems likely that at least one place it is happening is index.php. I am deducing this only because it is indicated in some entries by a referring URL. The try/catch code is currently only around the "top" initialization portion of the script, below that is mostly the HTML output. There is some PHP code in the output (pretty straightforward stuff though), so I may need to test that. Here is the catch part, which is not producing any output in the logs:
} catch (Exception $e) {
error_log(get_class($e)." thrown. Message: ".$e->getMessage(). " in " . $e->getFile() . " on line ".$e->getLine());
error_log('Exception trace stack: ' . print_r($e->getTrace(),1));
}
Would really appreciate any tips on this!
EDIT: PHP is running as an Apache module (Server API: Apache 2.0 Handler). I don't think there are any PHP accelerators in use, but it could just be that I don't know how to tell. None of the ones listed on Wikipedia are in phpinfo().
As far as I can tell the MPM is prefork. This is the first I'd ever looked into the MPM:
# ./httpd -l
Compiled in modules:
core.c
prefork.c
http_core.c
mod_so.c
The problem
In short you have a exception thrown somewhere, you have no idea where and up until now you could not reproduce the error: It only happens for some people, but not for you. You know that it happens for other people, because you see that in the error logs.
Reproduce the problem
Since you have already eliminated the common reasons you will need to reproduce the error. If you know which parameter will cause the error it should be easy to locate the error.
Most likely it is enough if you know all the POST/GET parameters.
If you can't reproduce with just these, you need to know additional request headers. Such as user agent, accept-encoding,...
If you still can't reproduce, then it becomes very difficult: The error may depend on a state (a session), the current time, the source ip address or the like.
The custom log method
Let's start simple: To get all parameters you can write in the very beginning of the affected php file something like:
file_put_contents("/path/to/some/custom_error_log", date()."\n".print_r(get_defined_vars(), true), FILE_APPEND | LOCK_EX);
Don't forget that the custom_error_log file must be writable to your php application. Then, when the error occurs in the error log, find the corresponding lines in your custom_error_log file. Hopefully there are not to many requests per second so that you can still identify the request. Maybe some additional parameters in the error log like source ip can help you identify the request (if your error log shows that).
From that data, reconstruct a request with the same POST/GET parameters.
The tcpdump method
The next option that is very simple as well, but requires you to have root-access on your target machine is to install tcpflow. Then create a folder, cd into that folder and simply execute (as root) tcpflow "port 80". The option (port 80) is a pcap filter expression. To see all you can do with that, see man pcap-filter. There is a lot what these filter expressions can do.
Now tcpflow will record all tcp connections on port 80, reconstruct the full data exchange by combining the packages belonging to one connection and dump this data to a file, creating two new files per connection, one for incoming data and one for outgoing data. Now find the files for a connection that caused an error, again based on the timestamp in your error log and by the last modified timestamp of the files. Then you get the full http request headers. You can now reconstruct the HTTP request completely, including setting the same accept-encoding, user-agent, etc. You can even pipe the request directly into netcat, replaying the exact request. Beware though that some arguments like a sessionid might be in your way. If php discovers that a session is expired you may just get a redirect to a login or something else that is unexpected. You may need to exchange things like the session id.
Mocking more things
If none of this helps and you can't reproduce the error on your machine, then you can try to mock everything that is hard to mock. For example the source ip adress. This might make some stunts necessary, but it is possible: You can connect to your server using ssh with the "-w" option, creating a tunnel interface. Then assign the offending ip adress to your own machine and set routes (route add host ) rules to use the tunnel for the specific ip. If you can cable the two computers directly together then you can even do it without the tunnel.
Don't foget to mock the session which should be esiest. You can read all session variables using the method with print_r(get_defined_vars()). Then you need to create a session with exactly the same variables.
Ask the user
Another option would be actually ask the user what he was doing. Maybe you can follow the same steps as he and can reproduce.
If none of this helps
If none of that helps... well... Then it gets seriously difficult. The IP-thing is already highly unlikely. It could be a GEO-IP library that causes the error on IPs from a specific region, but these are all rather unlikely things. If none of the above helped you to reproduce the problem, then you probably just did not find the correct request in all the data generated by the custom_log_file-call / tcpflow. Try to increase your chances by getting a more accurate timestamp. You can use microtime() in php as a replacement for date(). Check your webserver, if you can get something more accurate than seconds in your error log. Write your own implementation of "tail", that gives you a more accurate timestamp,... Reduce the load on the system, so that you don't have to choose from that much data (try another time of day, load of users to different servers,...)
circle the problem once you can reproduce
Now once you can reproduce it should be a walk in the park to find the actual cause. You can find the parameter that causes the error by trial and error or by comparing it to other requests that caused an error, too, looking for similarities. And then you can see what this parameter does, which libraries access it, etc. You can disable every component one by one that uses the parameter until you can't reproduce anymore. Then you got your component and can dive into the problem deeper.
Tell us what you found. I am curious ;-).
I had such an error, too. Found out that I returned a sql object in my session class (that was used by the session_handler) instead of returning nothing or at least not the sql object. First look into your _write and _read methods, if you too return some incorrect stuff.
Notice: ... Unknown on line 0 - How to find correct line, it's NOT "line 0"
I realize this question has already been answered, but I'll add this since it may help someone:
I managed to (unintentionally) produce errors without a stack frame from a function which used its own error handler to maintain control of execution while calling a potentially "dangerous" function, like this:
// Assume the function my_error_handler() has been defined to convert any
// PHP Errors, Warnings, or Notices into Exceptions.
function foo() {
// maintain control if danger() crashes outright:
set_error_handler('my_error_handler');
try {
// Do some stuff.
$r = danger();
} catch (Exception $e) {
$r = 'Bad Stuff, Man!';
}
restore error_handler();
return $r;
}
The "untraceable failure" would happen at the end of the program execution if the logic in "Do some stuff" returned from foo() directly, bypassing the call to restore_error_handler(). What I took away from the experience is this:
PHP maintains a stack of error handlers which gets deeper/taller with each call to set_error_handler().
Bad Stuff can happen if you push error handlers onto the stack and don't clean up after yourself before the program exits "normally".
This was a tough bug to isolate - I basically narrowed the problem down to the above function and then stared at it until my eyes bled.
So how would I have tracked this down, knowing what I know now? Since I don't know of any way to inspect the PHP error handler "stack" directly, I'm thinking it might make sense to use a Singleton object to encapsulate all set/restore operations for PHP error handlers. At least then it would be possible to inspect the state of the Singleton before exiting the program normally, and if "dangling" error handlers are detected to generate a sensible failure/warning message before PHP freaks out.
Instead of wrapping code in a try/catch block, what happens when you register an exception handler? Clearly your try/catch block is not catching the exception, thus resulting in the errors logged to Apache. By registering a handler, you can be sure any uncaught exception is handled.
Also, if you're using namespaces in your application, make sure you write \Exception in your catch block (or include the Exception class via a use statement).
This may be a little late but one issue I discovered when moving a site from a local to a remote server. I was using Concrete5 cms had developed my site locally(windows 8 in xampp) and then uploaded to a remote server running Cent 0S
Windows mysql by default is case insensitive and created a lower case database. Once this was uploaded to the remote server I received the "Exception thrown without a stack frame in Unknown on line 0?"
I then corrected the database tables case and my site started working again.
For us, this error was due to inadvertently serializing SimpleXML objects.
If you are using SimpleXML objects with 5.3.3, make sure you are are casting the node values to whatever you need (e.g. string) if you are serializing the values in the session.
Before:
$token = $response->Token->Value;
/* token saved in session, results in line 0 error */
After:
$token = (string) $response->Token->Value;
/* token saved in session, no error */
I had completely the same error. A very spacial case: if you connect an unnamed function (closure) hook to an object instance's hook point. After that you try to serialize this object.
I had the same error after filling the Illuminate Eloquent model's Fillable property incorrectly. Note the last 3 elements of the array, one is missing a coma.
protected $fillable = [
'budget',
'routestatus' ,
'userroutenumber'
'totalmovingseconds',
'totalidleseconds'
];
I had the same error, it appeared upgrading server from centos 5 to centos 6 and downgrading PHP from 5.4 to 5.3. Actual issue was PHP apc, not configured properly. Check your APC. I was using Symfony2, so you might find some help at Symfony Unable to allocate memory for pool
one simple way to produce this error is an old server with register_globals = On. then you only need two lines of code:
<?php
$_SESSION["my_var"] = "string";
$my_var = new MyClass(); //could be any class, i guess
?>
as soon as you reload this page once, you'll get the Exception thrown without a stack frame in Unknown on line 0 - error. seems like there is a conflict between the instance of the class and the (session) variable.
at least this is how i got this annoying error which is so hard to debug.
This problem occurred for me when I changed the namespace on a few Symfony bundles. Deleting the files in the the symfony cache directory fixed the issue.
Likely you have a corrupt/inconsistent table in the database. Try dumping the database. If you get a error that's the time. Repair that table and the issue should go away.
It is for this reason why clean install works. The clean install is just that clean.
mysqlcheck should work but if it does not show and issue still do above.