Apache Spark公式のofficial product documentation page ('Cluster Mode Overview')(https://spark.apache.org/docs/latest/cluster-overview.html)は、Apache Sparkの導入形態に関する一次情報である。None of the existing References describe how/where Spark actually runs in production (deployment/cluster-manager options); existing content stays at the level of processing paradigms (batch/streaming/ML) and organizational history, so this is a genuinely new deployment-focused fact.具体的には「Apache Spark currently officially supports three cluster managers for deployment: its own built-in Standalone cluster manager, Hadoop YARN, and Kubernetes; Apache Mesos, which was historically supported, is not listed among the currently supported cluster managers on this documentation page.」といった記載がある。ただし、提供形態の詳細(対応地域・対応バージョン等)はこのSourceからは確認できません。 This reflects the current ('latest') version of the documentation; it does not state exactly when Mesos support was removed, and does not cover cloud-vendor-managed Spark offerings (e.g. Databricks, AWS EMR, Google Dataproc) which layer on top of these underlying cluster managers.2026年08月23日に同Sourceを取得し、この内容を確認した。検証待ちApache Spark導入形態に関する公開情報