CDN:EdgeScript monitoring

Monitoring item

Description

Status

The execution status indicates what happens when a client request reaches a point of presence (POP) for a domain name where EdgeScript is configured. Each request results in one of the following four statuses:

• NonExecution

  The script was not executed. For example, if your script is configured to run at the foot stage, which is after other CDN configurations are processed, a request might be terminated by another feature such as anti-hotlinking or a redirect. In this case, the script at the foot stage does not run.

• ExecutedAndHit

  The script was executed, matched the code logic, and terminated normally by returning return true.

• ExecutedButNotHit

  The script was executed but did not match the code logic. This means the script did not terminate by returning return true. For example, your code may not have a return true statement, or it may explicitly return return false.

• Exception

  Indicates that an exception, such as a logic error or a timeout, occurred during script execution. Common causes include incorrect parameters or an execution time that exceeds 50 ms. You can add the _es_dbg configuration in the Extensions section of your EdgeScript configuration and use the debugging tool in the upper-right corner of the EdgeScript page to view debugging information and locate the error. For information about how to add the _es_dbg configuration, see Use the console to configure EdgeScript.

  Note

  If you set _es_dbg to a specific value in the Alibaba Cloud CDN console, client requests must include the _es_dbg parameter with the matching value to enable debugging.

Exception

Indicates that an exception occurred during script execution, returning one of the following error codes:

• 400: The script contains an unsupported function.

• 401: Incorrect number of arguments for a function.

• 402: An argument is not of the expected string type.

• 403: An argument is not of the expected numeric type.

• 404: An argument is not of the expected dictionary type.

• 405: An argument is not of the expected boolean type.

• 406: An argument is not of the expected function type.

• 407: Rule execution timed out.

• 408: Maximum number of calls exceeded.

• 409: Maximum number of loops exceeded.

• 410: Maximum number of loops exceeded.

• 499: Unknown type error.