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hanging in select()

From: Osmond, Emily (Factiva) <Emily.Osmond@factiva.com>
Date: Wed, 8 May 2002 15:42:55 -0400
To: "'www-lib@w3.org'" <www-lib@w3.org>
Message-ID: <B590D9176561D411BED000508BCF54180257D196@sbrmxsmb02.us.factiva.com>
Hello,
I'm using libwww in Tru64 Unix.  My application is multi-threaded.  One of
the threads sends http Post requests to another server.  After so many
requests, the thread that calls libwww hangs in select().  Below is the
stack trace after the thread has been idle for about 2 hours:
 -- SEE Thread 0xd

thread 0x11 stopped at>*[__usleep_thread, 0x3ff800f0838]        beq     r19,
0x3ff800f0850
(dbx) where
>  0 __usleep_thread(0x292, 0x1200a98d8, 0x3ff800ddba0, 0xa0db33cd67264,
0x3ff801553f4) [0x3ff800f0838]
   1 __sleep(0x0, 0x1, 0x11fff7d50, 0x13cd67264, 0xffffffff00000002)
[0x3ff80155438]
   2 main(argc = 5, argv = 0x11fffeda8, envp = 0x11fffedd8)
["fastclip.c":985, 0x1200a9ccc]
(dbx) tstack

Thread 0x5:
>  0 __hstQueueUnblockAndTerminate(0x0, 0x24, 0x0, 0x200000000, 0x0)
[0x3ff805b0b10]
   1 __hstSaveUnblockContext(0x3ff805a6038, 0x3ffc01b1470, 0x3ff00000000,
0x3ffc01b1470, 0x3ff80588d50) [0x3ff80590224]

Thread 0x7:
>  0 __nxm_thread_block(0x3ff80598b30, 0x140099880, 0x140099d40,
0x140099880, 0x3ff8059d624) [0x3ff805b0ea8]
   1 (unknown)() [0x3ff8059d64c]
   2 (unknown)() [0x3ff8059d04c]
   3 __thdBase(0x0, 0x0, 0x0, 0x0, 0x0) [0x3ff805a5e1c]

Thread 0x9:
>  0 __nxm_idle(0x3ff80599740, 0x1400c3d40, 0x1400c3880, 0x0, 0x0)
[0x3ff805b0e28]
   1 __vpIdle(0x3ff8059f7a0, 0x1400c3d40, 0x1400c3880, 0x3ffc01b5c60,
0x1400c19d8) [0x3ff805afaec]
   2 (unknown)() [0x3ff8059f79c]
   3 (unknown)() [0x3ff8059dc3c]
   4 __thdBase(0x3ff80598c10, 0x1400c3d40, 0x3ff8059d924, 0x1400c3880, 0x0)
[0x3ff805a5e1c]

Thread 0xb:
More (n if no)?
>  0 __nxm_idle(0x3ff80599000, 0x1400a9880, 0x3ff00000001, 0x1400a9880,
0x3ff8058d3e0) [0x3ff805b0e28]
   1 __vpIdle(0x3ff8059f7a0, 0x1400a9d40, 0x1400a9880, 0x3ffc01b5c60,
0x1400a79d8) [0x3ff805afaec]
   2 (unknown)() [0x3ff8059f79c]
   3 (unknown)() [0x3ff8059dc3c]
   4 __thdBase(0x0, 0x0, 0x1400a7eb8, 0x1400a9880, 0x0) [0x3ff805a5e1c]

Thread 0xd:
>  0 __select(0x16, 0xffffffffa55f7e04, 0x1, 0x1, 0x0) [0x3ff800d5868]
   1 HTEventList_loop(theRequest = 0x140de8600)
["../../../w3c-libwww-5.3.2/Library/src/HTEvtLst.c":725, 0x3000200fc7c]
   2 http_dlv_thread__7dlvHttpXv(this = 0x1400ad460) ["dlvHttp.C":346,
0x1200ce6cc]
   3 http_thread__XPv( = (nil))
["../../include/dlvHttp.H~alt~deccxx_105C5CEF":89, 0x1200a63f8]
   4 __thdBase(0x0, 0x0, 0x0, 0x0, 0x0) [0x3ff805a5e1c]

Thread 0xf:
>  0 __usleep_thread(0x3ff00000008, 0x3ffc00895a8, 0x3ff800ddba0,
0x125b13cd671f3, 0x3ff801553f4) [0x3ff800f0838]
   1 __sleep(0x0, 0xb4, 0x42, 0x3cd671f3, 0x0) [0x3ff80155438]
   2 threadFunc__XPv( = (nil)) ["prf_threadfunc.c":224, 0x1200ba75c]
   3 __thdBase(0x0, 0x0, 0x0, 0x0, 0x0) [0x3ff805a5e1c]
More (n if no)?

Thread 0x11:
>  0 __usleep_thread(0x292, 0x1200a98d8, 0x3ff800ddba0, 0xa0db33cd67264,
0x3ff801553f4) [0x3ff800f0838]
   1 __sleep(0x0, 0x1, 0x11fff7d50, 0x13cd67264, 0xffffffff00000002)
[0x3ff80155438]
   2 main(argc = 5, argv = 0x11fffeda8, envp = 0x11fffedd8)
["fastclip.c":985, 0x1200a9ccc]
(dbx) 
I set the EventTimeout to 120000  (2 minutes).

Any help will be appreciated.  
Thank you very much.


> Emily Osmond	  	        	      
      Factiva, a Dow Jones & Reuters Company 
      PO Box 300 Princeton, 
        New Jersey 08543-0300 
Phone: (609) 627-2412
> E-mail: emily.osmond@factiva.com
> 
> 
Received on Wednesday, 8 May 2002 15:43:13 GMT

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