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iperf connect failed: Operation now in progress

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.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ margin-bottom:0;
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2

I have installed iperf on two computers using yum install iperf.

On server A, i ran iperf -s, on server B I ran iperf -c ipv4here

I got this error:

connect failed: Operation now in progress

I looked for this error, but I couldn't find any explanation.
What does it mean? What can be done to fix it?

I am on Centos 7. I also tried to connect to iperf predefined server with:

iperf -c bouygues.iperf.fr

And was successful on machine A and B. With that said, there must be an issue on my end.

networking

share|improve this question

edited Sep 19 '18 at 22:12

user88036

asked Sep 19 '18 at 22:08

potatopotato

1234

bumped to the homepage by Community♦ 1 hour ago

This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I can verify this on current CentOS 7
  
  – AdamKalisz
  Apr 11 at 12:05
  

  
  
  
  

add a comment | 

2

I have installed iperf on two computers using yum install iperf.

On server A, i ran iperf -s, on server B I ran iperf -c ipv4here

I got this error:

connect failed: Operation now in progress

I looked for this error, but I couldn't find any explanation.
What does it mean? What can be done to fix it?

I am on Centos 7. I also tried to connect to iperf predefined server with:

iperf -c bouygues.iperf.fr

And was successful on machine A and B. With that said, there must be an issue on my end.

networking

share|improve this question

edited Sep 19 '18 at 22:12

user88036

asked Sep 19 '18 at 22:08

potatopotato

1234

bumped to the homepage by Community♦ 1 hour ago

This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I can verify this on current CentOS 7
  
  – AdamKalisz
  Apr 11 at 12:05
  

  
  
  
  

add a comment | 

I have installed iperf on two computers using yum install iperf.

On server A, i ran iperf -s, on server B I ran iperf -c ipv4here

I got this error:

connect failed: Operation now in progress

I looked for this error, but I couldn't find any explanation.
What does it mean? What can be done to fix it?

I am on Centos 7. I also tried to connect to iperf predefined server with:

iperf -c bouygues.iperf.fr

And was successful on machine A and B. With that said, there must be an issue on my end.

networking

share|improve this question

edited Sep 19 '18 at 22:12

user88036

asked Sep 19 '18 at 22:08

potatopotato

1234

connect failed: Operation now in progress

iperf -c bouygues.iperf.fr

share|improve this question

edited Sep 19 '18 at 22:12

user88036

asked Sep 19 '18 at 22:08

potatopotato

1234

share|improve this question

edited Sep 19 '18 at 22:12

user88036

asked Sep 19 '18 at 22:08

potatopotato

1234

asked Sep 19 '18 at 22:08

potatopotato

1234

asked Sep 19 '18 at 22:08

potatopotato

1234

1 Answer
1

active

oldest

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0

According to the manual page for connect, the error EINPROGRESS ("Operation now in progress") doesn't actually refer to an error condition. Rather, it means that "The socket is nonblocking and the connection cannot be completed immediately." Any program that uses nonblocking sockets should recognize this and handle it internally (by select()ing for completion or something). As iperf is instead failing and presenting that error to you, it would appear that you have somehow found a bug in it, which you should report to the developers.

share|improve this answer

answered Sep 19 '18 at 23:22

Joseph SibleJoseph Sible

1,293313

add a comment | 

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0

According to the manual page for connect, the error EINPROGRESS ("Operation now in progress") doesn't actually refer to an error condition. Rather, it means that "The socket is nonblocking and the connection cannot be completed immediately." Any program that uses nonblocking sockets should recognize this and handle it internally (by select()ing for completion or something). As iperf is instead failing and presenting that error to you, it would appear that you have somehow found a bug in it, which you should report to the developers.

share|improve this answer

answered Sep 19 '18 at 23:22

Joseph SibleJoseph Sible

1,293313

add a comment | 

0

According to the manual page for connect, the error EINPROGRESS ("Operation now in progress") doesn't actually refer to an error condition. Rather, it means that "The socket is nonblocking and the connection cannot be completed immediately." Any program that uses nonblocking sockets should recognize this and handle it internally (by select()ing for completion or something). As iperf is instead failing and presenting that error to you, it would appear that you have somehow found a bug in it, which you should report to the developers.

share|improve this answer

answered Sep 19 '18 at 23:22

Joseph SibleJoseph Sible

1,293313

add a comment | 

According to the manual page for connect, the error EINPROGRESS ("Operation now in progress") doesn't actually refer to an error condition. Rather, it means that "The socket is nonblocking and the connection cannot be completed immediately." Any program that uses nonblocking sockets should recognize this and handle it internally (by select()ing for completion or something). As iperf is instead failing and presenting that error to you, it would appear that you have somehow found a bug in it, which you should report to the developers.

share|improve this answer

answered Sep 19 '18 at 23:22

Joseph SibleJoseph Sible

1,293313

share|improve this answer

answered Sep 19 '18 at 23:22

Joseph SibleJoseph Sible

1,293313

answered Sep 19 '18 at 23:22

Joseph SibleJoseph Sible

1,293313

answered Sep 19 '18 at 23:22

Joseph SibleJoseph Sible

1,293313