socket close hangs and CPU go to 100%


 
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Operating Systems HP-UX socket close hangs and CPU go to 100%
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Old 08-22-2006
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!
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Mojo::Server(3pm)					User Contributed Perl Documentation					 Mojo::Server(3pm)

NAME
Mojo::Server - HTTP server base class SYNOPSIS
use Mojo::Base 'Mojo::Server'; sub run { my $self = shift; # Get a transaction my $tx = $self->build_tx; # Emit "request" event $self->emit(request => $tx); } DESCRIPTION
Mojo::Server is an abstract HTTP server base class. EVENTS
Mojo::Server can emit the following events. "request" $server->on(request => sub { my ($server, $tx) = @_; ... }); Emitted when a request is ready and needs to be handled. $server->unsubscribe('request'); $server->on(request => sub { my ($server, $tx) = @_; $tx->res->code(200); $tx->res->headers->content_type('text/plain'); $tx->res->body('Hello World!'); $tx->resume; }); ATTRIBUTES
Mojo::Server implements the following attributes. "app" my $app = $server->app; $server = $server->app(MojoSubclass->new); Application this server handles, defaults to a Mojo::HelloWorld object. "app_class" my $app_class = $server->app_class; $server = $server->app_class('MojoSubclass'); Class of the application this server handles, defaults to the value of the "MOJO_APP" environment variable or Mojo::HelloWorld. METHODS
Mojo::Server inherits all methods from Mojo::EventEmitter and implements the following new ones. "new" my $server = Mojo::Server->new; Construct a new Mojo::Server object and subscribe to "request" event with default request handling. "build_tx" my $tx = $server->build_tx; Let application build a transaction. "load_app" my $app = $server->load_app('./myapp.pl'); Load application from script. say Mojo::Server->new->load_app('./myapp.pl')->home; "run" $server->run; Run server. Meant to be overloaded in a subclass. SEE ALSO
Mojolicious, Mojolicious::Guides, <http://mojolicio.us>. perl v5.14.2 2012-09-05 Mojo::Server(3pm)