Incident: Twitter Inc Resolves Software Glitch Causing Service Disruption.

Published Date: 2022-02-11

Postmortem Analysis
Timeline 1. The software failure incident happened on February 11, 2022, as reported in Article 124692.
System 1. Twitter Inc's micro-blogging website [Article 124692]
Responsible Organization 1. Twitter Inc - Twitter acknowledged and fixed the software glitch that disrupted services for thousands of users [124692].
Impacted Organization 1. Twitter Inc (TWTR.N) [Article 124692]
Software Causes 1. The software glitch in Twitter's micro-blogging website that prevented timelines from loading and Tweets from posting was a key software cause of the failure incident [124692].
Non-software Causes 1. The disruption in services was caused by a technical bug that prevented timelines from loading and Tweets from posting on Twitter's micro-blogging website [124692].
Impacts 1. Users experienced disruptions in accessing timelines and posting tweets on Twitter due to the software glitch [Article 124692]. 2. Over 40,000 users reported the outage on Downdetector, indicating a widespread impact on the service's availability [Article 124692]. 3. Some users complained of being logged out of their Twitter accounts, while others were unable to send or retrieve tweets, showcasing the varied impacts on user experience [Article 124692].
Preventions 1. Implementing thorough testing procedures before deploying updates or changes to the Twitter platform could have potentially prevented the software glitch [124692]. 2. Conducting regular monitoring and maintenance of the application programming interfaces (APIs) to ensure their stability and functionality could have helped in identifying and addressing any issues before they escalated [124692]. 3. Enhancing user feedback mechanisms to quickly identify and address user-reported errors or issues could have aided in resolving the problem before it affected a larger number of users [124692].
Fixes 1. Twitter Inc fixed the software glitch that was preventing timelines from loading and Tweets from posting [124692].
References 1. Twitter Inc (TWTR.N) statement on the software glitch [Article 124692] 2. Twitter's status page [Article 124692] 3. Downdetector website [Article 124692] 4. Reddit users' complaints [Article 124692]

Software Taxonomy of Faults

Category Option Rationale
Recurring one_organization (a) The software failure incident related to Twitter experiencing disruptions due to a software glitch has happened again within the same organization. Twitter mentioned that they had fixed a technical bug that was preventing timelines from loading and tweets from posting, indicating a recurring issue within their platform [124692].
Phase (Design/Operation) design, operation (a) The software failure incident in the Twitter case was related to a technical bug that was preventing timelines from loading and tweets from posting, indicating a failure in the design phase where a glitch was introduced during the development of the system [124692]. (b) Users reported being logged out of their Twitter accounts and facing issues with sending or retrieving tweets, suggesting a failure in the operation phase where users were experiencing disruptions in using the system [124692].
Boundary (Internal/External) within_system (a) within_system: The software failure incident reported in the article was due to a technical bug within Twitter's micro-blogging website that prevented timelines from loading and tweets from posting. Twitter mentioned that they had fixed the bug causing the disruption [Article 124692]. (b) outside_system: The article does not provide information indicating that the software failure incident was caused by contributing factors originating from outside the system.
Nature (Human/Non-human) non-human_actions (a) The software failure incident on Twitter was attributed to a software glitch, which is a non-human action. Twitter mentioned that a technical bug was the cause of disrupted services for several thousand users [124692]. (b) Human actions were not explicitly mentioned as contributing factors to the software failure incident on Twitter. The focus was on fixing the technical bug that caused the disruption in services [124692].
Dimension (Hardware/Software) software (a) The software failure incident reported in Article 124692 was due to a software glitch in Twitter's micro-blogging website. Twitter mentioned that they had fixed a technical bug that was preventing timelines from loading and Tweets from posting, indicating that the issue originated in the software [124692].
Objective (Malicious/Non-malicious) non-malicious (a) The software failure incident reported in Article 124692 was non-malicious. Twitter Inc. mentioned that the disruption was caused by a technical bug that prevented timelines from loading and tweets from posting. The company stated that they had fixed the bug, indicating that the issue was not caused by malicious intent [124692].
Intent (Poor/Accidental Decisions) accidental_decisions (a) The software failure incident reported in Article 124692 was not explicitly attributed to poor decisions. The incident was described as a software glitch that disrupted services for several thousand Twitter users. The company mentioned fixing a technical bug that prevented timelines from loading and tweets from posting. The root cause of the glitch was not specified as being due to poor decisions. (b) The software failure incident in Article 124692 was characterized by a software glitch that affected the functionality of Twitter for thousands of users. The glitch led to issues such as timelines not loading and tweets not posting. This incident appears to be more aligned with accidental decisions or mistakes rather than intentional poor decisions.
Capability (Incompetence/Accidental) accidental (a) The software failure incident reported in Article 124692 was not explicitly attributed to development incompetence. The issue was described as a software glitch that disrupted services for several thousand Twitter users. The company mentioned fixing a technical bug that prevented timelines from loading and tweets from posting. This indicates a technical issue rather than a failure due to development incompetence. (b) The software failure incident in Article 124692 was attributed to a software glitch, indicating a failure introduced accidentally rather than intentionally. The glitch caused disruptions in services for thousands of Twitter users, leading to issues such as timelines not loading and tweets not posting. The company acknowledged the bug and stated that things should be back to normal after fixing it.
Duration temporary The software failure incident reported in Article 124692 was temporary. Twitter Inc mentioned that they had fixed a software glitch that was causing disruptions for several thousand users. The company stated that timelines were not loading and tweets were not posting due to a technical bug, but after fixing it, things were back to normal. This indicates that the failure was temporary and not permanent [124692].
Behaviour omission, value, other (a) crash: The software failure incident in the article was not described as a crash where the system loses state and does not perform any of its intended functions. [124692] (b) omission: The software glitch mentioned in the article caused disruptions in services for several thousand users, preventing timelines from loading and tweets from posting. This indicates an omission of performing the intended functions at that instance. [124692] (c) timing: The article does not mention the software failure incident being related to timing issues where the system performs its intended functions but too late or too early. [124692] (d) value: The software glitch mentioned in the article resulted in timelines not loading and tweets not posting, indicating a failure in performing the intended functions correctly. This aligns with the value type of failure. [124692] (e) byzantine: The software failure incident in the article does not exhibit behaviors of inconsistent responses or interactions, which would align with a byzantine type of failure. [124692] (f) other: The behavior of the software failure incident in the article can be categorized as a glitch that disrupted services, leading to users being unable to load timelines or post tweets. This behavior could be classified as a temporary malfunction or disruption in the system's normal functioning.

IoT System Layer

Layer Option Rationale
Perception None None
Communication None None
Application None None

Other Details

Category Option Rationale
Consequence delay The consequence of the software failure incident reported in the article was mainly related to user inconvenience and disruption of service. Twitter users experienced issues such as timelines not loading, inability to post tweets, being logged out of their accounts, and difficulty sending or retrieving tweets. The incident affected over 40,000 users, as reported on Downdetector. There were no reports of any severe consequences such as death, physical harm, impact on basic needs, property loss, or non-human entities being affected. The primary impact was on the functionality and usability of the Twitter platform for its users [124692].
Domain information (a) The software failure incident reported in the article is related to the information industry, specifically affecting Twitter's micro-blogging website [Article 124692].

Sources

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