topic Re: No buffer space available: accept: (client socket) in Operating System - HP-UX

No buffer space available: accept: (client socket)

deepak_9 — Fri, 17 May 2002 08:53:09 GMT

Hi,

I am getting the following error repeatedly in my error_log file under Apache Home. Due to this error I am unable to open few html pages. Please revert back if anyone has a solution . I have apache1.3 on hpux11.11.

No buffer space available: accept: (client socket)

Re: No buffer space available: accept: (client socket)

Steve Steel — Fri, 17 May 2002 09:08:49 GMT

Hi

This is happening:

Client initiates a server connection but the
Server is busy and , the request goes to the accept queue
Client times out at about the same time that the Server starts to respond to the request
Server tries to accept , but the client has already sent a CONNRESET signal, the server connection buffers are freed.
Server sees that there's no connection buffer, it gets back ENOBUFS from the TCP stack, and complains..

This is a problem in the Apache handling of the ENOBUFS . The problem
can be reduced by raising the value of:

tcp_conn_request_max

use Apache 2.0. This issue has been resolved )

Steve steel

Re: No buffer space available: accept: (client socket)

U.SivaKumar_2 — Fri, 17 May 2002 09:13:59 GMT

hi,
Can you access the loopback interface of your
server ?.
#ping 127.0.0.1
otherwise your kernel tables will be full with
TCP connections and this error may come.
Also please attach the output of netstat -rn

regards,
U.SivaKumar

Re: No buffer space available: accept: (client socket)

deepak_9 — Fri, 17 May 2002 09:19:21 GMT

Hi ,

Attached is are the results requested by you :-

apps1:toor-/d04/oracle/etcsora/iAS/Apache/Apache/logs>ping 127.0.0.1
PING 127.0.0.1: 64 byte packets
64 bytes from 127.0.0.1: icmp_seq=0. time=0. ms
64 bytes from 127.0.0.1: icmp_seq=1. time=0. ms
64 bytes from 127.0.0.1: icmp_seq=2. time=0. ms
64 bytes from 127.0.0.1: icmp_seq=3. time=0. ms
64 bytes from 127.0.0.1: icmp_seq=4. time=0. ms

----127.0.0.1 PING Statistics----
5 packets transmitted, 5 packets received, 0% packet loss
round-trip (ms) min/avg/max = 0/0/0
apps1:toor-/d04/oracle/etcsora/iAS/Apache/Apache/logs>netstat -rn
Routing tables
Destination Gateway Flags Refs Interface Pmtu
127.0.0.1 127.0.0.1 UH 0 lo0 4136
172.17.112.1 172.17.112.1 UH 0 lan0 4136
172.17.113.1 172.17.113.1 UH 0 lan1 4136
172.17.114.1 172.17.114.1 UH 0 lan4 4136
172.17.112.10 172.17.112.10 UH 0 lan0:1 4136
172.17.112.19 172.17.112.19 UH 0 lo0:1 4136
172.17.14.43 172.17.112.251 UGH 0 lan0 0
172.20.21.68 172.17.112.251 UGH 0 lan0 0
172.17.90.18 172.17.112.251 UGH 0 lan0 0
172.19.41.179 172.17.112.251 UGH 0 lan0 0
172.20.138.58 172.17.112.251 UGH 0 lan0 0
10.10.10.221 172.17.112.251 UGH 0 lan0 0
172.17.10.239 172.17.112.251 UGH 0 lan0 0
172.17.112.0 172.17.112.1 U 3 lan0 1500
172.17.112.0 172.17.112.10 U 3 lan0:1 1500
172.17.113.0 172.17.113.1 U 2 lan1 1500
172.17.114.0 172.17.114.1 U 2 lan4 1500
127.0.0.0 127.0.0.1 U 0 lo0 0
default 172.17.112.254 UG 0 lan0 0

Re: No buffer space available: accept: (client socket)

U.SivaKumar_2 — Fri, 17 May 2002 09:27:35 GMT

hi,
please try this also and paste the output.
#ping localhost
if possible stop all the apppication related to
networking like X-windows etc.
buffer space refers TCP buffers only. Increasing the memory will also help to a great extent. What is your free memory in the
system ?.what is the hardware details ?.

regards,
U.SivaKumar

Re: No buffer space available: accept: (client socket)

T G Manikandan — Fri, 17 May 2002 09:38:51 GMT

check these

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x54d1d08cc06fd511abcd0090277a778c,00.html

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x23677e990647d4118fee0090279cd0f9,00.html