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INFO: task <process>:<pid> blocked for more than 120 seconds メッセージが記録され、システムが反応しない

Solution Verified - Updated -

Issue

  • システムの反応がなくなる前に、/var/log/messages に以下のログが記録されます。
INFO: task <process>:<pid> blocked for more than 120 seconds
  • 上記メッセージが記録される原因は何ですか? また、トラブルシュートにはどんな情報が必要ですか?

Environment

  • Red Hat Enterprise Linux (RHEL) 5.5 (kernel-2.6.18-194) 以降
  • Red Hat Enterprise Linux (RHEL) 6
  • Red Hat Enterprise Linux (RHEL) 7
  • D 状態 (uninterruptible sleep) のプロセス

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