Why suddenly increase vsftpd root process ? (Doc ID 2269531.1)

Last updated on MAY 24, 2017

Applies to:

Linux OS - Version Oracle Linux 5.10 with Unbreakable Enterprise Kernel [2.6.39] and later
Information in this document applies to any platform.

Symptoms

1. During the vsftpd service in Oracle Linux, vsftpd process is also a sudden increase in created as the root user.

2. It was the entirety of the system I/O delay occurs, and can not connected new ssh client

3. However, CPU and memory, Disk utilization was not high.

 

When the vsftpd process created by the root user suddenly increases, it increases to until 3000 vsftpd process

---

egrep "vsftp|zzz" ps.dat | egrep "root|zzz"

5 S root 14743 1 0 80 0 - 11088 inet_c 21:12 ? 00:00:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
1 S root 15020 14743 0 80 0 - 11088 unix_s 21:12 ? 00:00:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
1 S root 15356 14743 0 80 0 - 11088 unix_s 21:12 ? 00:00:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
1 S root 15588 14743 0 80 0 - 20361 unix_w 21:12 ? 00:00:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
1 S root 15592 14743 0 80 0 - 20361 unix_w 21:12 ? 00:00:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
1 S root 15594 14743 0 80 0 - 20361 unix_w 21:12 ? 00:00:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
1 S root 15599 14743 0 80 0 - 20361 unix_w 21:12 ? 00:00:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
1 S root 15601 14743 0 80 0 - 11088 unix_s 21:12 ? 00:00:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
1 S root 15606 14743 0 80 0 - 20361 unix_w 21:12 ? 00:00:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
1 S root 15608 14743 0 80 0 - 20361 unix_w 21:12 ? 00:00:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
1 S root 15612 14743 0 80 0 - 20361 unix_w 21:12 ? 00:00:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
1 S root 15616 14743 0 80 0 - 20361 unix_w 21:12 ? 00:00:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
1 S root 15618 14743 0 80 0 - 20361 unix_w 21:12 ? 00:00:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
1 S root 15620 14743 0 80 0 - 20361 unix_w 21:12 ? 00:00:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
1 S root 15635 14743 0 80 0 - 20265 unix_w 21:12 ? 00:00:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
1 S root 15637 14743 0 80 0 - 20362 unix_w 21:12 ? 00:00:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
1 S root 15639 14743 0 80 0 - 17685 unix_w 21:12 ? 00:00:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
1 S root 15641 14743 0 80 0 - 20265 unix_w 21:12 ? 00:00:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
1 S root 15644 14743 0 80 0 - 20362 unix_w 21:12 ? 00:00:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf

 

Cause

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