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August 10th, 2006

amitdang Offline

Junior Member

Join Date: August 2006

Posts: 1

fopen() error

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Hi All, require help in understanding the problem. I have a multithreaded program that uses fopen() quite frequently and at some point a thread calling fopen() hangs.
Stack trace of a thread that hangs is as follows

ptrgl._ptrgl() at 0xd0215a70
_rec_mutex_lock(??) at 0xd022eff0
_rec_mutex_lock(??) at 0xd022eff0
_endopen(??, ??, ??, ??) at 0xd0230304
fopen64(??, ??) at 0xd0230808
inv_internal_flush(), line 435 in "inven_disk.c"
inv_disk_commit(), line 529 in "inven_disk.c"

Machine Configuration: AIX 5.3.0, POWERPC, IBM,7044-170, Single CPU, User and Kernel both running in 32 - bit.

Questions:
1 ) Is it some kind of deadlock inside kernel?
2 ) If my program as well as kernel are running in 32-bit, then why is dbx where command showing fopen64()?
3 ) Can anybody point out in what scenairo such problem can arise?

Regards,
Amit Dang

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