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0
votes
1answer
36 views

my website can get ping but status always “Waiting” when visiting via browser

When i tried to use CMD.exe and then typed : ping fgroupindonesia.com it returns a true respond such as : C:\Users\admin>ping fgroupindonesia.com Pinging fgroupindonesia.com [219.83.68.83] ...
0
votes
0answers
12 views

Windows/IIS7.5 half-closing connections resulting in sockets in TIME_WAIT

I'm seeing scenarios where the client side initiates the TCP close but the webserver (IIS 7.5) simply responds with an ACK and the connection ends up in TIME_WAIT. Why would it do that? Typical HTTP ...
0
votes
1answer
35 views

Netcat - socket in time_wait when echoing and piping, but not when invoked directly

I'm testing an application using netcat (nc) and I'm getting very low throughput on network connections. When I ran netstat -tnpo I see numerous TCP sessions in TIME_WAIT. I'm sending data to my ...
1
vote
0answers
28 views

Why might a connection stay in TIME_WAIT for hours or even days?

Our environment is ubuntu 12.04 on EC2. I know TIME_WAIT is a good thing, and I know generally it's OK to see connections remain in TIME_WAIT for up to 2 minutes according to all the reading I've ...
-5
votes
1answer
43 views

Why is the same socket in TIME_WAIT many times?

I have read other threads regarding sockets in TIME_WAIT, but I am clearly still missing something. Below is a few lines from a "netstat -an". How could it get into this situation? If I understood ...
2
votes
0answers
145 views

Why is SQL Server using all ephemeral ports connecting to itself and causing TIME_WAITs?

I've got an AWS server with Windows 2008 R2, SQL Server 2012, and Tomcat 7. When I run netstat -ano the screen is flooded with TIME_WAIT. I posted the output in a Gist. When I run CurrPorts, filter ...
0
votes
1answer
398 views

How to trace TIME_WAIT sessions using tcpdump (or similar tool)

I have a server with large number of TIME_WAIT sessions. These are sessions that the server closed, but the client didn't close. I want to analyze a sample session, to understand what happens there. ...
3
votes
1answer
2k views

High # of sockets in TIME-WAIT state, server unresponsive at load

Our app became unresponsive at high loads, with longer wait times. Process usage was abnormally low (~15% CPU utilisation per process, our app runs on 8 processes). Nginx error log output showed a ...
2
votes
1answer
1k views

Relationship between tcp state TIME_WAIT & HTTP keep-alive

What is the relationship between keep-alive on a HTTP request and a tcp socket in TIME_WAIT - should they be correlated? Furthermore, should system and web server settings be aligned e.g. server.max-...
1
vote
0answers
67 views

periodic connection timeouts to nginx server

We have the following setup: One nginx server as a loadbalancer in front of four worker application servers. The nginx server get about 100 requests per second, sometimes more that that, active ...
6
votes
1answer
1k views

Redis connection issue

We are currently experiencing a lot of Redis errors with the message Unable to connect: read error on connection, trying next server We run Redis on FreeBSD using PHP Redis and we have a hard ...
1
vote
1answer
1k views

Lots of TIME_WAIT from same IP address

I've seen a lot of questions with people concerned about lots of TIME_WAITs in netstat. I'm having a similar problem but all the TIME_WAITs are coming from the same IP address. I get over 200 of the ...
0
votes
1answer
286 views

Limiting outgoing connections by port to control nf_conntrack usage

I would like to make my system more resilient against certain failure. When the system makes rapid outbound TCP connections fail, the nf_conntrack table fills up with TIME_WAIT entries. This ...
1
vote
1answer
990 views

How to reduce the timeout for TIME_WAIT connections on OpenBSD?

I'm running http_load on OpenBSD 5.2, to test how good my nginx setup is, and I've noticed that cold runs are much faster than warm runs, and with every run the performance goes down very dramatically ...
6
votes
1answer
2k views

https lingering TIME_WAIT connections

From my client PC I'm connecting to a webserver, it uses HTTPS only. When I connect I see in TCPView (sysinternals tool alternative to netstat) a lot of TIME_WAIT connections to the https endpoint. ...
1
vote
2answers
553 views

How to diagnose large number of TIME_WAIT connections

We have a production issue with only one of our servers and have correlated slow performance to an abundance of sockets in the TIME_WAIT state. Without drawing this question into a huge backstory, we ...
-1
votes
2answers
34k views

Avoid TIME_WAIT connections [duplicate]

When I use netstat command it shows.. tcp 0 0 localhost:18056 localhost:mysql TIME_WAIT tcp 0 0 localhost:16683 localhost:mysql ...
0
votes
1answer
218 views

PHP Adodb many sleeping connections

Already asked the question on stackoverflow but i guess this might be a better place for it. I'm currently struggeling with a strange problem: while using adodb as connection layer for php, it leaves ...
0
votes
1answer
423 views

Debian/Apache Server waiting time very slow only with Chrome

I have a website running on a Linux Debian Squeeze server with Apache 2. The website is the only one on the server and the traffic to the website is very low (800-1000 connection per day). The ...
1
vote
0answers
421 views

Does TIME_WAIT affect dynamic ports?

I've read a bit about TIME_WAIT connections, and know they should be harmless to my server (connection closed, so no resource connected with this socket). Recently, my server reached the magic ...
1
vote
1answer
484 views

Connection between nginx and Varnish

I am using nginx as reverse proxy with varnish in the background. I have LAMP fueling varnish. The problem I am seeing on Varnish server is that the connection from nginx is getting established ...
1
vote
0answers
964 views

Lots of TIME_WAIT connections with nginx reverse-proxy

I'm using nginx as reverse proxy to redirect some traffic to openfire XMPP server. Here's what I see in netstat: 972 connections to port 80 from outside (includes website and redirected XMPP over ...
4
votes
1answer
137 views

Can a TIME_WAIT connection be restored?

Is it possible to restore a connection that is in state TIME_WAIT? If not, I use raw packets (forgering the source), is it possible? (Please understand that I do not intend to do bad things, it's ...
5
votes
2answers
985 views

Network error with 65k of TIME_WAIT connections

We had some trouble with one of our image servers last week and need some help. See our munin monitoring graph: We are runing debian squeeze and we have lots of requests because this is one of our ...
0
votes
2answers
1k views

Newly configured MSSQL2008, TIME_WAIT but no ESTABLISHED?

Windows 2008 R2, standard. No firewall locally on it. Newly setup because an old SQL2000 had two disks die (or could it be the raid controller?) at the same time. Luckily, I had fresh backups. The ...
2
votes
2answers
713 views

TIME_WAIT Info (reduce)

I have a ajax application that makes a request every 3 seconds, the requested page sets the header to (header("Connection: Keep-Alive, close");) then performs a database query and returns the latest ...