A "Tail" logging terminal session may occasionally hang and cannot be exited

技術的な記事 ID: KB84480
最終更新: 5/21/2020

環境

McAfee VirusScan Enterprise for Linux (VSEL) 2.0, 2.0.1, 2.0.2

All supported Linux operating systems

問題

A terminal session to "Tail" a live log file generated by an application occasionally stops working and cannot be exited using CTRL+C. When this occurs, that particular session can be exited only after you disable the VSEL On-Access Scanner, or stop the nails service (with the command /etc/init.d/nails stop).

原因

McAfee has determined that the issue is actually in the Fanotify feature of Linux Kernels when multiple threads iterate to the same directory or files. This can result in some threads hanging.

McAfee has opened the following Bug Report with Kernel.org: https://bugzilla.kernel.org/show_bug.cgi?id=95131.

解決策

This issue is not directly related to or caused by VSEL. Any future solution must come from the Kernel and development teams for the Linux operating systems involved. If you experience this issue, McAfee recommends that you contact support for the operating system manufacturer.

Until the manufacturers resolve the issue, you can use the following workaround.

回避策

Use the following commands to run tail or tailf with output buffering disabled:

#unbuffer tail –f /dir/logfile

#unbuffer tailf –n /dir/logfile

影響を受ける製品

Known Issue/Product Defect
VirusScan Enterprise for Linux 2.0.x

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A "Tail" logging terminal session may occasionally hang and cannot be exited

環境

問題

原因

解決策

回避策

関連情報

影響を受ける製品

言語:

技術用語集

Title

Title

Knowledge Center

A "Tail" logging terminal session may occasionally hang and cannot be exited

環境

問題

原因

解決策

回避策

関連情報

影響を受ける製品

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