Visit The New, Modern Unix Linux Community


socket close hangs and CPU go to 100%


 
Thread Tools Search this Thread
Operating Systems HP-UX socket close hangs and CPU go to 100%
# 1  
socket close hangs and CPU go to 100%

Hello,

I'm currently having a problem with HPUX.

The application is a C app. It's a socket server.
It runs mostly fine, but under some circumstances (I can not replicate it), the app hangs and the CPU goes to 100%.

I have use gdb to attach to the app, and it was doing a close().
the close() system call is the one that is hanging.

--------------------
(gdb) where
#0 0xc00000000031a5d0:0 in _close_sys+0x30 () from /usr/lib/hpux64/libc.so.1
#1 0xc00000000032ac40:0 in close+0x140 () from /usr/lib/hpux64/libc.so.1
#2 0x4000000000053950:0 in server (soc_id=5, client_address={sin_family = 2,
sin_port = 3149, sin_addr = {s_addr = 3489154679},
sin_zero = "\000\000\000\000\000\000\000"}) at src/tpswitch.c:982
#3 0x4000000000055b50:0 in main (argc=1, argv=0x9fffffffffffe8a0)
at src/tpswitch.c:1244
-----------------------

The previous stack trace shows that the app is in _close_sys+0x30() from the c library.

The descriptor passed to close() is a socket descriptor.

Thanks in advance for your Help!

Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

Test Your Knowledge in Computers #283
Difficulty: Easy
Early computers were built to perform a series of single tasks, like a calculator.
True or False?

9 More Discussions You Might Find Interesting

1. IP Networking

Clarification - Setting socket options at the same time when socket is listening

I need clarification on whether it is okay to set socket options on a listening socket simultaneously when it is being used in an accept() call? Following is the scenario:- -- Task 1 - is executing in a loop - polling a listen socket, lets call it 'fd', (whose file descriptor is global)... (2 Replies)
Discussion started by: jake24
2 Replies

2. Programming

when parent process close, how to close the child?

can someone provide an example, where if the parent process quits for any reason, then the child process will also close? (3 Replies)
Discussion started by: omega666
3 Replies

3. IP Networking

Is it necessary to close socket after a unstop loop?

Is the last two line necessary? #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> int main(void) { struct sockaddr_in stSockAddr; ... (0 Replies)
Discussion started by: vistastar
0 Replies

4. Solaris

Multi CPU Solaris system shows 100% CPU usage.

Hello Friends, On one of my Solaris 10 box, CPU usage shows 100% using "sar", "vmstat". However, it has 4 CPUs and prstat and glance are not showing enough processes to justify high CPU utilization. ========================================================================= $ prstat -a ... (4 Replies)
Discussion started by: mahive
4 Replies

5. UNIX for Advanced & Expert Users

connect problem for sctp socket (ipv6 socket) - Runtime fail Invalid Arguments

Hi, I was porting ipv4 application to ipv6; i was done with TCP transports. Now i am facing problem with SCTp transport at runtime. To test SCTP transport I am using following server and client socket programs. Server program runs fine, but client program fails giving Invalid Arguments for... (0 Replies)
Discussion started by: chandrutiptur
0 Replies

6. Programming

socket close() -w- pthreads linux 2.6.18.2-34 (suse) SMP

Interesting issue. There was some discussion on the LKML last year regarding the potential problems in concurrent applications reusing file descriptors in various scenarios. The main issue is that the reuse of a file descriptor and reception of data in a threaded application can be confused pretty... (1 Reply)
Discussion started by: ramen_noodle
1 Replies

7. UNIX and Linux Applications

any way to close socket

I have written a socker program. I have executed that program many times without closing the socket. So I want to find which all sockets binded with which file descriptor. Is there any way to close those socket, which have been opened in that program's execution. please help me!.. (3 Replies)
Discussion started by: pa.chidhambaram
3 Replies

8. HP-UX

Close Socket at HP-UX

Hi all, I have a HP-UX 11.23 that have a Server establishing connections on port 8888 . The problem is that when i need to stop and restart the Server, the connections mantain the same state and i need to wait about 20-30 minutes before all connections finishes. The connections remain at... (2 Replies)
Discussion started by: Renato Gregio
2 Replies

9. Programming

C Prog to close a socket in established state

I have a SUN environment running an WebLogic that communicates w/a 3rd party running IIS. When the IIS site goes down (frequently), I am stuck with sockets in an ESTABLISHED state, and cannot seem to figure out how to avoid this. No exceptions are thrown as I can still open connections to the IIS... (1 Reply)
Discussion started by: teledelux
1 Replies
NET-SERVER(1)						User Contributed Perl Documentation					     NET-SERVER(1)

NAME
net-server - Base Net::Server starting module SYNOPSIS
net-server [base type] [net server arguments] net-server PreFork ipv '*' net-server HTTP net-server HTTP app foo.cgi net-server HTTP app foo.cgi app /=bar.cgi net-server HTTP port 8080 port 8443/ssl ipv '*' server_type PreFork --SSL_key_file=my.key --SSL_cert_file=my.crt access_log_file STDERR DESCRIPTION
The net-server program gives a simple way to test out code and try port connection parameters. Though the running server can be robust enough for full tim use, it is anticipated that this binary will just be used for basic testing of net-server ports, acting as a simple echo server, or for running development scripts as CGI. OPTIONS
"base type" The very first argument may be a Net::Server flavor. This is given as shorthand for writing out server_type "ServerFlavor". Additionally, this allows types such as HTTP and PSGI, which are not true Net::Server base types, to subclass other server types via an additional server_type argument. net-server PreFork net-server HTTP # becomes a HTTP server in the Fork flavor net-server HTTP server_type PreFork # preforking HTTP server "port" Port to bind upon. Default is 80 if running a HTTP server as root, 8080 if running a HTTP server as non-root, or 20203 otherwise. Multiple value can be given for binding to multiple ports. All of the methods for specifying port attributes enumerated in Net::Server and Net::Server::Proto are available here. net-server port 20201 net-server port 20202 net-server port 20203/IPv6 "host" Host to bind to. Default is *. Will bind to an IPv4 socket if an IPv4 address is given. Will bind to an IPv6 socket if an IPv6 address is given (requires installation of IO::Socket::INET6). If a hostname is given and "ipv" is still set to 4, an IPv4 socket will be created. If a hostname is given and "ipv" is set to 6, an IPv6 socket will be created. If a hostname is given and "ipv" is set to * (default), a lookup will be performed and any available IPv4 or IPv6 addresses will be bound. The "ipv" parameter can be set directly, or passed along in the port, or additionally can be passed as part of the hostname. net-server host localhost net-server host localhost/IPv4 There are many more options available. Please see the Net::Server documentation. AUTHOR
Paul Seamons <paul at seamons.com> LICENSE
This package may be distributed under the terms of either the GNU General Public License or the Perl Artistic License perl v5.16.2 2012-06-12 NET-SERVER(1)

Featured Tech Videos