AccessDeniedException ☕ Java

java.nio.file.AccessDeniedException: /path

The OS denied a file operation to the Java process.

Seen on: Java

Meaning

The JVM user lacks permission, the target is read-only, or (on Windows) another process has the file locked.

Common causes

  • Process user lacks permissions
  • Writing into a read-only mount (containers)
  • File locked on Windows

⚡ Quick fix

  1. Fix ownership/permissions
  2. Write to a writable volume
  3. Close other programs holding the file

Detailed fix by platform

Linux

  1. ls -l /path && id

How to diagnose

  1. User — Which user runs the JVM?
  2. Mount — Read-only filesystem?

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