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Symptoms

  • Several processes on app-server-01 are stuck in uninterruptible sleep (D state).
  • ls /mnt/shared-data hangs indefinitely and cannot be interrupted with Ctrl+C.
  • Any process that touches the /mnt/shared-data path becomes stuck.
  • df -h hangs when it tries to stat the NFS mount.
  • The NFS server nfs.internal:2049 is unreachable due to a network switch failure.
  • The mount was configured with default (hard mount) options.
  • The application deployment process is blocked because it tries to write to the NFS path.