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SSH 로그인 중 "bash fork Cannot allocate memory" 메시지가 발생하는 이유는 무엇인가요?

Solution Verified - Updated -

Issue

  • 시스템이 아래 오류 메시지와 함께 재부팅됩니다:
-bash: fork: Cannot allocate memory
  • 콘솔에서 다음 오류와 함께 user 계정으로 로그인할 수 없습니다.
System error for create: "Cannot allocate memory"
  • 시스템이 응답하지 않으며 로그인 시 또는 명령 실행 중 아래 오류가 발생합니다.
-bash: fork: Cannot allocate memory
  • 커널이 아래와 같이 다양한 시스템 데몬 및 서비스에 대한 메시지를 로깅합니다:
Feb 27 16:30:01 uklvapapp577 crond: /usr/sbin/sendmail: Cannot allocate memory
Feb 27 16:30:01 uklvapapp577 crond: /usr/sbin/sendmail: Cannot allocate memory
Feb 27 18:02:05 uklvapapp577 puppet-agent[4848]: Could not run: Cannot allocate memory - fork(2)
Feb 27 18:02:05 uklvapapp577 puppet-agent[4848]: Could not run: Cannot allocate memory - fork(2)
Feb 27 18:29:33 uklvapapp577 systemd: Failed to fork: Cannot allocate memory
Feb 27 18:29:33 uklvapapp577 systemd: Failed to fork: Cannot allocate memory
Feb 27 18:29:33 uklvapapp577 systemd: systemd-tmpfiles-clean.service failed to run 'start' task: Cannot allocate memory
Feb 27 18:29:33 uklvapapp577 systemd: systemd-tmpfiles-clean.service failed to run 'start' task: Cannot allocate memory
Feb 28 04:20:06 uklvapapp577 systemd: Failed to fork: Cannot allocate memory
Feb 28 04:20:06 uklvapapp577 systemd: Failed to fork: Cannot allocate memory
Feb 28 04:20:06 uklvapapp577 systemd: getty@tty1.service failed to run 'start' task: Cannot allocate memory
Feb 28 04:20:06 uklvapapp577 systemd: getty@tty1.service failed to run 'start' task: Cannot allocate memory

Environment

  • Red Hat Enterprise Linux (RHEL)

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