TCP 7077
Synopsis
- Apache Spark Standalone uses TCP 7077 for the Spark master service; workers and clients (spark-submit) connect to spark://host:7077.
- This is the default in upstream Apache Spark (e.g., Spark 2.x/3.x), and commonly seen in on-prem or Docker deployments (e.g., Bitnami/official Spark images exposing 7077).
- Managed or packaged distributions that support Spark Standalone (e.g., vanilla Spark on VM clusters) also rely on 7077 unless reconfigured.
- Security note: Exposed, unsecured Spark masters on 7077 have been widely abused for unauthenticated job submission leading to remote code execution and cryptomining.
Observed activity
Last 30 days
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