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libwww death loop?

From: Mikhail Grouchinski <mgrouch@usa.net>
Date: 29 Dec 99 16:12:02 EST
Message-ID: <19991229211202.5430.qmail@nw171.netaddress.usa.net>
To: www-lib@w3.org
Hello all,

I'm testing my application which uses libwww. I have a libwww timer 
set to 30 sec. This timer generates requests every 30 sec to the same URL.
Everything works fine for a while. After some time (several hours) libwww
stops calling request callback registered in HTNet object.
It still generates requests every 30 sec but these requests stucks in libwww.
It happens only when I test it against apache web server.
The same test runs fine when URL points to an old Netscape Enterprise Server 
(I had 15 days uptime). I tried this test with apache several times with
the same effect. Libwww suddenly stops returning requests after some (quite
long,
several hours or days) period of time.

I'm able to turn tracing on at the time it is happening.
Here is the log...

Any help is greatly appreciated...

Memory Free. 400661a8
Event Loop.. calling select: maxfds is 7
............ READ : 6
............ WRITE:
............ OOB  :
............ Timeout is 20 s, 63000 microsecs
Event Loop.. select returns 0
............ READ :
............ WRITE:
............ OOB  :
............ Timeout is 20 s, 63000 microsecs
Event Loop.. calling select: maxfds is 7
............ READ : 6
............ WRITE:
............ OOB  :
............ Timeout is 0 s, 10000 microsecs
Event Loop.. select returns 0
............ READ :
............ WRITE:
............ OOB  :
............ Timeout is 0 s, 10000 microsecs
Memory Free. 4002aea8
Timer....... Found timer 4002ae88 with callback 40005762, context 4002acd0,
and relative timeout 30000
Timer....... Dispatch timer 4002ae88
Request..... Created 40066670
HTSimplify.. `http://siug001:8080' into
............ `http://siug001:8080'
Anchor...... 400667b0 with address `http://siug001:8080' created
ChunkStream. Chunk 400661a8 created with max size 0
HTAccess.... Accessing document http://siug001:8080
Memory Free. 40066890
Net Before.. calling 400057aa (request 40066670, context 00000000)
Net Before.. calling 7afde5b2 (request 40066670, context 00000000)
PEP Engine.. Looking for info on `http://siug001:8080'
Memory Free. 400668d8
Memory Free. 400668b8
Memory Free. 40066890
URL Tree.... did NOT find `w3c-pep'
Memory Free. 400668b8
PEP Engine.. No information
Net Before.. calling 7afdeaea (request 40066670, context 00000000)
Auth Engine. Looking up `http://siug001:8080'
Memory Free. 400668f8
Memory Free. 400668d8
Memory Free. 400668b0
URL Tree.... did NOT find `w3c-AA'
Memory Free. 400668d8
Auth Engine. No information
Memory Free. 40066890
Credentials. verified
Net Before.. calling 7afdeaf2 (request 40066670, context 00000000)
Check rules. for `http://siug001:8080'
Memory Free. 40066890
Memory Free. 400668f8
Memory Free. 40066890
Memory Free. 400668d0
Memory Free. 40066890
Net Object.. 400668d0 created with hash 0
Net Object.. starting request 40066670 (retry=1) with net object 400668d0
HTTP........ Looking for `http://siug001:8080'
Memory Free. 400668a0
Memory Free. 40066980
Memory Free. 40066958
HTHost parse Looking up `siug001' on port 8080
Host info... REUSING CHANNEL 40032b88
Memory Free. 40066980
Host info... Added Net 400668d0 (request 40066670) as pending on Host
40032788, 2 requests made, 1 requests in pipe, 154 pending
HTDoConnect. Pending...
Event Loop.. calling select: maxfds is 7
............ READ : 6
............ WRITE:
............ OOB  :
............ Timeout is 30 s, 0 microsecs
Event Loop.. select returns 0
............ READ :
............ WRITE:
............ OOB  :
............ Timeout is 30 s, 0 microsecs
Memory Free. 4002aea8
Timer....... Found timer 4002ae88 with callback 40005762, context 4002acd0,
and relative timeout 30000
Timer....... Dispatch timer 4002ae88
Request..... Created 40066a00
HTSimplify.. `http://siug001:8080' into
............ `http://siug001:8080'
Anchor...... 40066b40 with address `http://siug001:8080' created
ChunkStream. Chunk 40066c10 created with max size 0
HTAccess.... Accessing document http://siug001:8080
Memory Free. 40066c38
Net Before.. calling 400057aa (request 40066a00, context 00000000)
Net Before.. calling 7afde5b2 (request 40066a00, context 00000000)
PEP Engine.. Looking for info on `http://siug001:8080'
Memory Free. 40066c80
Memory Free. 40066c60
Memory Free. 40066c38
URL Tree.... did NOT find `w3c-pep'
Memory Free. 40066c60
PEP Engine.. No information
Net Before.. calling 7afdeaea (request 40066a00, context 00000000)
Auth Engine. Looking up `http://siug001:8080'
Memory Free. 40066ca0
Memory Free. 40066c80
Memory Free. 40066c58
URL Tree.... did NOT find `w3c-AA'
Memory Free. 40066c80
Auth Engine. No information
Memory Free. 40066c38
Credentials. verified
Net Before.. calling 7afdeaf2 (request 40066a00, context 00000000)
Check rules. for `http://siug001:8080'
Memory Free. 40066c38
Memory Free. 40066ca0
Memory Free. 40066c38
Memory Free. 40066c78
Memory Free. 40066c38
Net Object.. 40066c78 created with hash 0
Net Object.. starting request 40066a00 (retry=1) with net object 40066c78
HTTP........ Looking for `http://siug001:8080'
Memory Free. 40066c48
Memory Free. 40066d28
Memory Free. 40066d00
HTHost parse Looking up `siug001' on port 8080
Host info... REUSING CHANNEL 40032b88
Memory Free. 40066d28
Host info... Added Net 40066c78 (request 40066a00) as pending on Host
40032788, 2 requests made, 1 requests in pipe, 155 pending
HTDoConnect. Pending...
Event Loop.. calling select: maxfds is 7
............ READ : 6
............ WRITE:
............ OOB  :
............ Timeout is 30 s, 0 microsecs
Event Loop.. select returns 1
............ READ : 6
............ WRITE:
............ OOB  :
............ Timeout is 30 s, 0 microsecs
EventOrder.. execute ordered events
Memory Free. 40066d18
EventList... calling socket 6, request 00000000 handler 400057a2 type
HTEvent_READ
Memory Free. 40066d00
Event Loop.. calling select: maxfds is 7
............ READ : 6
............ WRITE:
............ OOB  :
............ Timeout is 6 s, 387000 microsecs
Event Loop.. select returns 0
............ READ :
............ WRITE:
............ OOB  :
............ Timeout is 6 s, 387000 microsecs
Memory Free. 4002aea8
Timer....... Found timer 4002ae88 with callback 40005762, context 4002acd0,
and relative timeout 30000
Timer....... Dispatch timer 4002ae88
Request..... Created 40066da8
HTSimplify.. `http://siug001:8080' into
............ `http://siug001:8080'
Anchor...... 40066ee8 with address `http://siug001:8080' created
ChunkStream. Chunk 40066fb8 created with max size 0
HTAccess.... Accessing document http://siug001:8080
Memory Free. 40066fe0
Net Before.. calling 400057aa (request 40066da8, context 00000000)
Net Before.. calling 7afde5b2 (request 40066da8, context 00000000)
PEP Engine.. Looking for info on `http://siug001:8080'
Memory Free. 40067028
Memory Free. 40067008
Memory Free. 40066fe0
URL Tree.... did NOT find `w3c-pep'
Memory Free. 40067008
PEP Engine.. No information
Net Before.. calling 7afdeaea (request 40066da8, context 00000000)
Auth Engine. Looking up `http://siug001:8080'
Memory Free. 40067048
Memory Free. 40067028
Memory Free. 40067000
URL Tree.... did NOT find `w3c-AA'
Memory Free. 40067028
Auth Engine. No information
Memory Free. 40066fe0
Credentials. verified
Net Before.. calling 7afdeaf2 (request 40066da8, context 00000000)
Check rules. for `http://siug001:8080'
Memory Free. 40066fe0
Memory Free. 40067048
Memory Free. 40066fe0
Memory Free. 40067020
Memory Free. 40066fe0
Net Object.. 40067020 created with hash 0
Net Object.. starting request 40066da8 (retry=1) with net object 40067020
HTTP........ Looking for `http://siug001:8080'
Memory Free. 40066ff0
Memory Free. 400670d0
Memory Free. 400670a8
HTHost parse Looking up `siug001' on port 8080
Host info... REUSING CHANNEL 40032b88
Memory Free. 400670d0
Host info... Added Net 40067020 (request 40066da8) as pending on Host
40032788, 2 requests made, 1 requests in pipe, 156 pending
HTDoConnect. Pending...
Event Loop.. calling select: maxfds is 7
............ READ : 6
............ WRITE:
............ OOB  :
............ Timeout is 30 s, 0 microsecs
Event Loop.. select returns 0
............ READ :
............ WRITE:
............ OOB  :
............ Timeout is 30 s, 0 microsecs
Memory Free. 4002aea8
Timer....... Found timer 4002ae88 with callback 40005762, context 4002acd0,
and relative timeout 30000
Timer....... Dispatch timer 4002ae88
Request..... Created 40067150
HTSimplify.. `http://siug001:8080' into
............ `http://siug001:8080'
Anchor...... 40067290 with address `http://siug001:8080' created
ChunkStream. Chunk 40067360 created with max size 0
HTAccess.... Accessing document http://siug001:8080
Memory Free. 40067388
Net Before.. calling 400057aa (request 40067150, context 00000000)
Net Before.. calling 7afde5b2 (request 40067150, context 00000000)
PEP Engine.. Looking for info on `http://siug001:8080'
Memory Free. 400673d0
Memory Free. 400673b0
Memory Free. 40067388
URL Tree.... did NOT find `w3c-pep'
Memory Free. 400673b0
PEP Engine.. No information
Net Before.. calling 7afdeaea (request 40067150, context 00000000)
Auth Engine. Looking up `http://siug001:8080'
Memory Free. 400673f0
Memory Free. 400673d0
Memory Free. 400673a8
URL Tree.... did NOT find `w3c-AA'
Memory Free. 400673d0
Auth Engine. No information
Memory Free. 40067388
Credentials. verified
Net Before.. calling 7afdeaf2 (request 40067150, context 00000000)
Check rules. for `http://siug001:8080'
Memory Free. 40067388
Memory Free. 400673f0
Memory Free. 40067388
Memory Free. 400673c8
Memory Free. 40067388
Net Object.. 400673c8 created with hash 0
Net Object.. starting request 40067150 (retry=1) with net object 400673c8
HTTP........ Looking for `http://siug001:8080'
Memory Free. 40067398
Memory Free. 40067478
Memory Free. 40067450
HTHost parse Looking up `siug001' on port 8080
Host info... REUSING CHANNEL 40032b88
Memory Free. 40067478
Host info... Added Net 400673c8 (request 40067150) as pending on Host
40032788, 2 requests made, 1 requests in pipe, 157 pending
HTDoConnect. Pending...
Event Loop.. calling select: maxfds is 7
............ READ : 6
............ WRITE:
............ OOB  :
............ Timeout is 29 s, 930000 microsecs
Event Loop.. select returns 0
............ READ :
............ WRITE:
............ OOB  :
............ Timeout is 29 s, 930000 microsecs
Memory Free. 4002ac28
Timer....... Found timer 4002ac08 with callback 400057b2, context 00000000,
and relative timeout 600000
Timer....... Dispatch timer 4002ac08
Event Loop.. calling select: maxfds is 7
............ READ : 6
............ WRITE:
............ OOB  :
............ Timeout is 0 s, 70000 microsecs
Event Loop.. select returns 0
............ READ :
............ WRITE:
............ OOB  :
............ Timeout is 0 s, 70000 microsecs
Memory Free. 4002aea8
Timer....... Found timer 4002ae88 with callback 40005762, context 4002acd0,
and relative timeout 30000
Timer....... Dispatch timer 4002ae88
Request..... Created 400674f8
HTSimplify.. `http://siug001:8080' into
............ `http://siug001:8080'
Anchor...... 40067638 with address `http://siug001:8080' created
ChunkStream. Chunk 40067708 created with max size 0
HTAccess.... Accessing document http://siug001:8080
Memory Free. 40067730
Net Before.. calling 400057aa (request 400674f8, context 00000000)
Net Before.. calling 7afde5b2 (request 400674f8, context 00000000)
PEP Engine.. Looking for info on `http://siug001:8080'

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Received on Wednesday, 29 December 1999 16:12:25 GMT

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