Retry poke function without failing current task run. There is a retry window _infra_failure_retry_window that the smart sensor will Is_infra_failure - If current exception was caused by transient infra failure. ParametersĮxception_info - Details of the exception information. There is a 6 hours windowįor retry without failing current run. Which was set at the first infra failure exception arrives. Implies an infra failure, this function will check the recorded infra failure timeout This function set the latest exception information for sensor exception. If the exception is an infra failure Typeīoolean set_latest_exception ( self, exception_info, is_infra_failure = False ) ¶ Infra failure, give the task more chance to retry before fail it. Hold sensor exception information and the type of exception. SensorExceptionInfo ( exception_info, is_infra_failure = False, infra_failure_retry_window = datetime.timedelta(minutes=130) ) ¶ The cached task object expires if there is no poke for 20 minutes. Mark this poke work to be popped from cached dict after current loop. clear_state ( self ) ¶Ĭlear state for cached poke work. To_flush: If we should flush the cached work. Last_poke_time: The latest time this cached work being called. Sensor_task: The cached object for executing the poke function. The sensor_task used to poke and recent poke result state. Wrapper class for the poke work inside smart sensor. close_sensor_logger ( self ) ¶Ĭlose log handler for a sensor work.
Return logger for a sensor instance object.
:return: log handler _get_sensor_logger ( self, si ) ¶ _eq_ ( self, other ) ¶ static create_new_task_handler ( ) ¶Ĭreate task log handler for a sensor work.
Key used to query in smart sensor for cached sensor work. Key for the task instance that maps to the sensor work. Log: The sensor work logger which will mock the corresponding task instance log. Op_classpath: The sensor operator class pathĮncoded_poke_context: The raw data from sensor_instance poke_context column. Hashcode: This is the signature of poking job. Poke_context: Decoded poke_context for the sensor task.Įxecution_context: Decoded execution_context. Create a sensor work based on sensor instance record.Ī sensor work object has the following attributes:Įxecution_date: sensor_instance execution_date. This class stores a sensor work with decoded context value. For a more long-lasting repair, have the MAF replaced. Many times, MAFs are removed, cleaned with a spray cleaner, and reinstalled.
#MAX AIRFLOW SENSOR CODE#
A trouble code will get logged in the computer, and the Check Engine Light will illuminate. If the MAF gets dirty, it becomes less accurate and a loss of performance will usually be noticed. If the PCV valve becomes restricted, it can cause crankcase vapors to back up through the engine’s breather system and leave oily deposits on the MAF. It should be replaced according to the manufacturer’s recommendations based on mileage. So replace the air filter when recommended, keep the inside of the air filter box very clean, and be sure the ducts between the air filter box and the throttle body are all securely clamped and airtight.Īnother simple maintenance item that is commonly neglected can impact the cleanliness of the MAF, the PCV valve. It is the job of the air filter to keep that all that junk off of the MAF, as well as out of your engine. Try to imagine 9,000-10,000 gallons of air flowing through your engine for every 1 gallon of gas burned! That much air carries a lot of fine dust and particulates of all types. Since the function of an MAF is to measure all the air flowing into the engine, they have a LOT of air flowing through them. A bit of basic preventative maintenance awareness can help an MAF stay alive and healthy as long as possible. They are also fairly fragile and sensitive to contamination.
However, MAF sensors are critical to engine performance, good gas mileage, and low emissions. They can remain in service indefinitely as long as they continue to function correctly. They are not included on the manufacturer’s scheduled maintenance list of things to replace based on mileage, like spark plugs or filters. Mass airflow sensors (MAF) have no expiration date. How often does the mass airflow sensor need to be replaced?
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