[英]Number of CLOSE_WAIT with lsof
I 一世
lsof | grep CLOSE_WAIT | wc -l
on ubuntu 14.04 LTS 在Ubuntu 14.04 LTS上
I got the PID and TID displayed. 我得到了显示的PID和TID。 There are say 70 CLOSE_WAITs on a java proc with x number of threads.
在一个具有x个线程的java proc上有70个CLOSE_WAIT。
However, if I do 但是,如果我这样做
lsof -i | grep CLOSE_WAIT |wc -l
I got only 1, which is the java process (no TID). 我只有1,这是Java进程(没有TID)。
Does it mean that we can't reliably figure out FS leak by doing lsof -i? 这是否意味着我们无法通过执行lsof -i来可靠地确定FS泄漏? We always have to use "lsof"?
我们总是必须使用“ lsof”吗?
As a sidebar, does anyone know why ELB is not closing the connection? 作为补充,没有人知道为什么ELB没有关闭连接吗?
java 9645 9863 ubuntu 133u IPv4 19375 0t0 TCP ip-10-20-187-89:51548->ec2-100-200-86-25.compute-1.amazonaws.com:https (CLOSE_WAIT) java 9645 9864 ubuntu 133u IPv4 19375 0t0 TCP ip-10-20-187-89:51548->ec2-100-200-86-25.compute-1.amazonaws.com:https (CLOSE_WAIT) java 9645 9865 ubuntu 133u IPv4 19375 0t0 TCP ip-10-20-187-89:51548->ec2-100-200-25.compute-1.amazonaws.com:https (CLOSE_WAIT) java 9645 9902 ubuntu 133u IPv4 19375 0t0 TCP ip-10-20-187-89:51548->ec2-100-200-25.compute-1.amazonaws.com:https (CLOSE_WAIT)
Thanks, 谢谢,
I'd recommend consulting a diagram like this one . 我建议参考这样的图表 。 A TCP connection is not considered closed each side sends a FIN and gets an ACK.
TCP连接不被认为是封闭的,每一端都发送FIN并获得ACK。
As stated here . 如此处所述 。
CLOSE_WAIT
usually indicates the remote end has sent a FIN and been ACK'd by the local end, but the local end has not sent a FIN. CLOSE_WAIT
通常指示远程端已发送FIN,并已被本地端确认,但本地端尚未发送FIN。
You're likely not seeing the rest of the CLOSE_WAIT entries with lsof -i
because the remote address is not being shown. 您可能看不到
lsof -i
剩下的CLOSE_WAIT条目,因为未显示远程地址。 It likely shows as empty. 它可能显示为空。
See also: 也可以看看:
https://superuser.com/questions/173535/what-are-close-wait-and-time-wait-states https://superuser.com/questions/173535/what-are-close-wait-and-time-wait-states
https://serverfault.com/questions/450055/lot-of-fin-wait2-close-wait-last-ack-and-time-wait-in-haproxy https://serverfault.com/questions/450055/lot-of-fin-wait2-close-wait-last-ack-and-time-wait-in-haproxy
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