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httpd が "apr_thread_create: unable to create worker thread" エラーメッセージを表示します

Solution Unverified - Updated -

Issue

  • /var/log/httpd/error.log に以下のエラーメッセージが表示されます。
[alert] (11)Resource temporarily unavailable: apr_thread_create: unable to create worker thread
[error] (11)Resource temporarily unavailable: fork:Unable to fork new process
[alert] (11)Resource temporarily unavailable: apr_thread_create: unable to create worker thread

Environment

  • Red Hat Enterprise Linux
    • 5.x
    • 6.x
  • Red Hat JBoss Enterprise Web Server
    • 1.x
    • 2.x
  • Apache httpd

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