CDN:EdgeScript monitoring

Monitoring item

Description

Status

The status of each script. If you configure a script for an accelerated domain name, the script can be in one of the following states after a client request arrives at a POP:

• NonExecution

  The script is not executed. For example, the script is set to be executed at the foot of the pipeline. This indicates that the script is executed only after all other scripts are executed. However, a request may be completed before it reaches the foot of the pipeline. For example, the request may be redirected or blocked by hotlink protection. In this case, the script at the foot of the pipeline is not executed.

• ExecutedAndHit

  The script is executed and the execution result is return true. This indicates that the request matches the logic in the script.

• ExecutedButNotHit

  The script is executed but the execution result is not return true. This indicates that the request does not match the logic in the script. For example, the script does not contain a return true statement or the script automatically returns a return false result.

• Exception

  An error occurred during script execution. In most cases, the error is caused by logical errors in the script or timeouts of script execution. For example, a parameter that is passed to the request is set to an invalid value or the script is executed for more than 50 milliseconds. You can add the _es_dbg extension to the script and use the debugging tool in the upper-right corner of the EdgeScript page to debug the code. Then, you can use the debugging information to fix the error. For information about how to add the _es_dbg extension, see Use the console to configure scripts.

  Note

  You can set _es_dbg to any value. Make sure that the same value is included in client requests. For example, if you set _es_dbg to 123 in the Alibaba Cloud CDN console, client requests must also contain _es_dbg=123.

Exception

An error occurred during script execution. In this case, an error code is returned. Error codes and descriptions:

• 400: The script contains an unsupported function.

• 401: The number of parameters that are expected by the function is invalid.

• 402: The string type does not match the type that is specified in the function.

• 403: The digit type does not match the type that is specified in the function.

• 404: The dictionary type does not match the type that is specified in the function.

• 405: The Boolean type does not match the type that is specified in the function.

• 406: The function type does not match the type that is specified in the function.

• 407: The script timed out.

• 408: The script has been executed the maximum number of times allowed.

• 409: The script has looped the maximum number of times allowed.

• 410: The script has looped the maximum number of times allowed.

• 499: An unknown error occurred.