Incident: Tesla App Outage Locks Drivers Out of Cars, Resolved by Musk

Published Date: 2021-11-20

Postmortem Analysis
Timeline 1. The software failure incident happened on a Friday according to the article [120909]. 2. The article was published on 2021-11-20. 3. Estimation: The software failure incident likely occurred on Friday, 2021-11-19.
System 1. Tesla app used as a key by drivers to unlock and start their cars [120909]
Responsible Organization 1. Tesla app server 2. Tesla company
Impacted Organization 1. Tesla drivers were impacted by the software failure incident as they were unable to start their cars due to the outage affecting the Tesla app [Article 120909].
Software Causes 1. The software cause of the failure incident was an outage in the Tesla app, which serves as a key for drivers to unlock and start their cars [120909].
Non-software Causes 1. The outage was caused by a disruption in the Tesla app, which serves as a key for drivers to unlock and start their cars [Article 120909].
Impacts 1. Tesla drivers were unable to start their cars and were locked out of their vehicles due to the outage affecting the Tesla app [Article 120909]. 2. About 500 users reported an error on the app initially, causing inconvenience and frustration for the affected drivers [Article 120909]. 3. The outage led to drivers being stranded away from home, unable to access their vehicles as they normally rely on the app as a key to unlock and start their cars [Article 120909]. 4. The incident highlighted the reliance on technology and the potential risks of being solely dependent on a single mechanism for accessing and operating vehicles [Article 120909].
Preventions 1. Implementing redundant or backup systems to ensure continuous access to the vehicles even in the event of app outages [120909]. 2. Conducting thorough testing and quality assurance processes to identify and address potential issues before they impact users [120909]. 3. Enhancing communication channels to promptly inform users about the outage and provide alternative methods to access their vehicles [120909].
Fixes 1. Implementing redundant or backup systems to ensure continuous access to the vehicles even in the event of app outages [120909]. 2. Conducting thorough testing and quality assurance processes to identify and address potential issues before they impact users [120909]. 3. Enhancing communication channels to promptly inform users about the outage, its resolution progress, and alternative access methods [120909].
References 1. Social media posts from Tesla drivers [Article 120909] 2. Elon Musk's Twitter responses [Article 120909] 3. Outage tracking site DownDetector [Article 120909] 4. Stuart Masson, editor of The Car Expert website [Article 120909] 5. Professor David Bailey from the Birmingham Business School [Article 120909]

Software Taxonomy of Faults

Category Option Rationale
Recurring one_organization (a) The software failure incident having happened again at one_organization: The article reports that Tesla drivers were locked out of their cars due to an outage in the Tesla app. This incident is not the first time such an issue has occurred with Tesla's software. Elon Musk, the CEO of Tesla, acknowledged the problem and mentioned taking measures to prevent it from happening again in the future [120909]. (b) The software failure incident having happened again at multiple_organization: There is no information in the provided article about similar incidents happening at other organizations or with their products and services.
Phase (Design/Operation) design, operation (a) The software failure incident in the article can be attributed to the design phase. The outage that left Tesla drivers unable to start their cars was caused by an error in the Tesla app, which serves as a key for the vehicles. This error prevented users from connecting to their vehicles, indicating a failure introduced by the system development or updates [120909]. (b) Additionally, the article mentions that the Tesla app is not the only way to access the cars, indicating that there is a secondary mechanism to get in or out of the car beyond the app. The difficulty for drivers would arise if they are not carrying this secondary mechanism, suggesting that failures due to operation or misuse of the system could also play a role in such incidents [120909].
Boundary (Internal/External) within_system (a) within_system: The software failure incident with Tesla's app that left drivers unable to start their cars was due to factors originating from within the system. The outage struck the carmaker's app, causing dozens of owners to be locked out of their cars and unable to connect to their vehicles [Article 120909]. Elon Musk, the CEO of Tesla, personally responded to complaints and mentioned that the app was coming back online. The issue was related to the functionality and reliability of the Tesla app itself, which serves as a key for drivers to unlock and start their cars. The reliance on the app as a primary mechanism for accessing the vehicles highlights the internal nature of the software failure incident.
Nature (Human/Non-human) non-human_actions (a) The software failure incident in the Tesla app outage was primarily due to non-human actions. The outage struck the app, preventing Tesla drivers from connecting to their vehicles. Elon Musk personally responded to complaints and mentioned that the app was coming back online, indicating a technical issue rather than human error [Article 120909].
Dimension (Hardware/Software) software (a) The software failure incident reported in Article 120909 was not attributed to hardware issues. The incident was specifically related to an outage that struck Tesla's app, which serves as a key for drivers to unlock and start their cars. The error message preventing drivers from connecting to their vehicles was a result of issues with the app itself, rather than any hardware-related problems. (b) The software failure incident in Article 120909 was primarily caused by issues originating in the software, specifically the Tesla app. The outage that left Tesla drivers unable to start their cars was a result of a malfunction in the app, which serves as a crucial component for accessing and operating the vehicles. Elon Musk acknowledged the issue and mentioned that the app was coming back online, indicating that the root cause of the failure was related to software issues rather than hardware problems.
Objective (Malicious/Non-malicious) non-malicious (a) The software failure incident reported in Article 120909 was non-malicious. The incident was caused by an outage that struck Tesla's app, leading to Tesla drivers being locked out of their cars. Elon Musk personally responded to complaints and mentioned that the app was coming back online. There was no indication in the article that the outage was caused by malicious intent; rather, it seemed to be a technical issue affecting the app's functionality [120909].
Intent (Poor/Accidental Decisions) accidental_decisions (a) The software failure incident related to Tesla drivers being locked out of their cars due to an outage of the Tesla app does not seem to be directly linked to poor decisions. The incident appears to be more of a technical issue or glitch rather than a result of poor decisions made by the company or individuals involved [120909]. (b) The software failure incident can be attributed to accidental decisions or unintended consequences rather than poor decisions. The outage that left Tesla drivers unable to start their cars was likely a result of a technical glitch or error in the app rather than a deliberate poor decision made by the company or its employees [120909].
Capability (Incompetence/Accidental) accidental (a) The software failure incident related to development incompetence is not explicitly mentioned in the provided article [120909]. (b) The software failure incident related to accidental factors is evident in the article as Tesla drivers were locked out of their cars due to an outage that struck the carmaker's app. This outage was not intentional but occurred accidentally, leading to users being unable to connect to their vehicles [120909].
Duration temporary The software failure incident reported in Article 120909 was temporary. The Tesla app outage prevented drivers from connecting to their vehicles for a certain period. Elon Musk responded to complaints and mentioned that the app was coming back online. The number of error reports decreased over time, indicating that the issue was resolved within a few hours [120909].
Behaviour crash, omission, value, other (a) crash: The software failure incident in the article can be categorized as a crash as Tesla drivers were unable to start their cars after an outage struck the carmaker's app. The app was not functioning as intended, leading to users being locked out of their vehicles and unable to connect to them [Article 120909]. (b) omission: The software failure incident can also be categorized as an omission as the Tesla app, which serves as a key for drivers to unlock and start their cars, omitted to perform its intended function during the outage. This omission resulted in owners being unable to use their vehicles as they normally would [Article 120909]. (c) timing: The timing of the software failure incident can be considered as a factor in the outage. The error on the Tesla app was reported by about 500 users at a specific time, and the number of reports decreased over time. The outage occurred at a particular time, impacting users' ability to access their vehicles [Article 120909]. (d) value: The software failure incident can also be attributed to a value-related failure as the Tesla app was not performing its intended function correctly during the outage. Users were unable to use the app as a key to unlock and start their cars, leading to inconvenience and frustration for many owners [Article 120909]. (e) byzantine: There is no indication in the article that the software failure incident exhibited byzantine behavior, which involves inconsistent responses and interactions. The focus of the incident was on users being locked out of their cars due to the app outage, rather than erratic or inconsistent behavior of the app itself [Article 120909]. (f) other: The other behavior exhibited by the software failure incident could be described as a system failure due to reliance on a single mechanism. The incident highlighted the risk of relying solely on technology like the Tesla app to access vehicles, as it can lead to users being caught out if the system fails. This emphasizes the importance of having backup mechanisms in place to prevent such failures [Article 120909].

IoT System Layer

Layer Option Rationale
Perception processing_unit, network_communication (a) sensor: The article does not mention any sensor-related issues that contributed to the software failure incident. (b) actuator: The article does not mention any actuator-related issues that contributed to the software failure incident. (c) processing_unit: The software failure incident affecting Tesla drivers was related to the Tesla app, which serves as a key for drivers to unlock and start their cars. The issue was with the app itself, indicating a processing error within the software system [Article 120909]. (d) network_communication: The software failure incident was triggered by an outage that struck the Tesla app, preventing users from connecting to their vehicles. This outage suggests a network communication error that disrupted the connection between the app and the cars [Article 120909]. (e) embedded_software: The article does not explicitly mention any issues related to embedded software that contributed to the software failure incident.
Communication connectivity_level The software failure incident reported in Article 120909 was related to the connectivity level of the cyber physical system. Tesla drivers were unable to start their cars due to an outage that struck the carmaker's app, which serves as a key for drivers to unlock and start their vehicles. The failure was specifically related to the mobile app's connectivity to the Tesla vehicles, indicating issues at the network or transport layer of the system [120909].
Application TRUE The software failure incident reported in Article 120909 was related to the application layer of the cyber physical system. This is evident from the fact that Tesla drivers were unable to start their cars due to an outage that struck the carmaker's app. The article mentions that dozens of owners experienced an error message on the mobile app preventing them from connecting to their vehicles, indicating a failure at the application layer [120909].

Other Details

Category Option Rationale
Consequence property, delay (d) property: People's material goods, money, or data was impacted due to the software failure The software failure incident involving Tesla's app outage left Tesla drivers unable to start their cars, as the app serves as a key for unlocking and starting the vehicles. This resulted in owners being locked out of their cars, with dozens of them posting on social media about the error message preventing them from connecting to their vehicles [120909]. Additionally, one owner mentioned being stuck an hour away from home because they normally use their phone to start their car, highlighting the inconvenience caused by the software failure [120909].
Domain transportation (a) The software failure incident reported in the article is related to the transportation industry. Tesla drivers were unable to start their cars due to an outage that affected the Tesla app, which serves as a key for drivers to unlock and start their vehicles [Article 120909].

Sources

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