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Libwww4.1: maxfds is 0
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To: www-lib-bugs@w3.org
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Subject: Libwww4.1: maxfds is 0
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From: Henrik Frystyk Nielsen <frystyk@w3.org>
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Date: Wed, 01 May 1996 14:08:15 -0400
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From frystyk@w3.org Wed May 1 14: 08:20 1996
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Message-Id: <9605011808.AA02856@www18.w3.org>
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Reply-To: Henrik Frystyk Nielsen <frystyk@w3.org>
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From: Vu Nguyen <vun@isdnsys.com>
To: "'lib-friends@w3.org'" <lib-friends@w3.org>
Subject: Libwww4.1: maxfds is 0
Date: Fri, 1 Mar 1996 13:12:01 -0500
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Hello Henrik,
Remember, my question about 'broken pipe' awhile ago with libwww4.0D?
I can reproduce the same problem with libwww4.1
Let me recap what the problem was:
During an "accept" state the lib uses the listen()'ing socket to look for
a request and it then creates a new socket/new request, and handles it -
good
Trouble shows up when the client prematurely closed the connection during
the 'accept' state. DoAccept() fails ---> the *listen()'ing* socket get
UnRegistered!
Below is a copy of trace that shows what happened:
Processing.. Read socket set. max_sock is 3
Retrieve.... Found socket 3
Accepting... socket 3
HTNet_new... starting SERVER request 8091188 with net object 808d120
HTTP Serve.. request 8091188 on socket 3
Alert Find.. No entry found for opcode 4
Error Add... number: 44 Severity: 4 Parameter: `accept:
Protocol error' Where: `accept'
Memory.... Freeing 8097958
HTDoAccept.. Accept failed
HTNetDelete. Object and call callback functions
Memory.... Freeing 8096c48
HTNet_delete Remove net object 808d120
UnRegister.. Found entry for socket 3 with ops 3f
Unregister.. operations set for socket is 0
ResetMaxSock max socket is 3
ResetMaxSock new max is 0
Memory.... Freeing 8086c70
HTNet_delete closing 3
Memory.... Freeing 808d120
Net callback 804f750 (request=8091188, status=-1)
SERVER...... 8091188 ended with status -1
Memory.... Freeing 80979f8
Memory.... Freeing 8097938
HTNet_delete Remove net object 808d120
UnRegister.. Found entry for socket 3 with ops 3f
Unregister.. operations set for socket is 0
ResetMaxSock max socket is 3
ResetMaxSock new max is 0
Memory.... Freeing 8086c70
HTNet_delete closing 3
Memory.... Freeing 808d120
Net callback 804f750 (request=8091188, status=-1)
SERVER...... 8091188 ended with status -1
Memory.... Freeing 80979f8
Memory.... Freeing 8097938
Memory.... Freeing 8096c38
Memory.... Freeing 8096c68
Memory.... Freeing 8091188
Memory.... Freeing 8086b40
Event Loop.. calling select: maxfds is 0
Now how did I cause that to happen?
I use Netscape browser to issue the initial request, while the requested
document is being loaded, I *repeatedly* click the 'Reload' button until I
see the listen()ing socket get UnRegistered. The trick is to request a
huge doc so that it takes the server a while to transfer data and do the
'Reload' during that time
Regards,
Vu Nguyen
PS, Keep up the Good Work - Thanks
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