Periodic hangs in mut_win32.c

I am getting frequent hangs in mut_win32.c at line 130 to 223;
loop:     /* Attempt to acquire the resource for N spins. */
goto loop;
Is there (maybe, hopefully) a reasonably simple intercept point that I can insert some printf's to see what is happening.
Seems like it always happens (when it happens) while doing an open after a previous run in which everything closed normally.
Have been unable to pin down a particular sequence that is causing it.
I am on WinXP with BDB 4.6.21
Thx,
Jim

OK. Here it is. Looks very similar to the db_verify version. I am running a checkpoint every second only to force the deadlock. My test pgm does a few opens, so it is pretty quick to lock up with all the checkpoints.
I'll try to reproduce it with what I call a "native" bdb app (one without all my pgms baggage).
I added some verbose logging options also which is at the end of this post.
Before the run, I deleted the entire BDB home dir, including __* files, all db files, and log files.
Thx,
Jim
main
     ntdll.dll!7c90eb94()      
     ntdll.dll!7c90e9c0()      
     kernel32.dll!7c8025cb()      
     kernel32.dll!7c802532()      
     libdb46d.dll!__db_win32_mutex_lock(__db_env * dbenv=0x00358bb8, unsigned int mutex=7) Line 223 + 0xe     C      libdb46d.dll!__memp_fopen(__db_mpoolfile * dbmfp=0x00359b50, __mpoolfile * mfp=0x00000000, const char * path=0x0012f260, unsigned int flags=1, int mode=0, unsigned int pgsize=8192)  Line 179 + 0x17     C
     libdb46d.dll!__db_env_mpool(__db * dbp=0x003597a0, const char * fname=0x0012f260, unsigned int flags=129)  Line 632 + 0x54     C
     libdb46d.dll!__db_env_setup(__db * dbp=0x003597a0, __db_txn * txn=0x0035b590, const char * fname=0x0012f260, const char * dname=0x00000000, unsigned int id=0, unsigned int flags=129)  Line 412 + 0x28     C
     libdb46d.dll!__db_open(__db * dbp=0x003597a0, __db_txn * txn=0x0035b590, const char * fname=0x0012f260, const char * dname=0x00000000, DBTYPE type=DB_BTREE, unsigned int flags=129, int mode=436, unsigned int meta_pgno=0)  Line 179 + 0x1d     C
     libdb46d.dll!__db_open_pp(__db * dbp=0x003597a0, __db_txn * txn=0x0035b590, const char * fname=0x0012f260, const char * dname=0x00000000, DBTYPE type=DB_BTREE, unsigned int flags=129, int mode=436)  Line 1130 + 0x23     C
     cs2tqr00.exe!open_db(tqfil_s * tqfilx=0x3e890b40, __db_env * dbenv=0x00358bb8, int shared=1, int rdonly=0, int opts=0, char * rsnam=0x3e808a64)  Line 163 + 0x3f     C
     cs2tqr00.exe!init_fcb(CS2CB_M90_S * rd=0x3f88bfe4, dbl_s * * dbl=0x0012fee4)  Line 1924 + 0x25     C
     cs2tqr00.exe!open_tablequeue(CS2AP_RWA_S * * rwa=0x0012ff50)  Line 1959 + 0xd     C
     cs2tqr00.exe!main(int argc=0, char * * argv=0x003562f4)  Line 328 + 0x9     C
     cs2tqr00.exe!mainCRTStartup()  Line 398 + 0x11     C
     kernel32.dll!7c816fd7()      
checkpoint thread [b]
     ntdll.dll!7c90eb94()      
     ntdll.dll!7c90e9c0()      
     kernel32.dll!7c8025cb()      
     kernel32.dll!7c802532()      
     libdb46d.dll!__db_win32_mutex_lock(__db_env * dbenv=0x00358bb8, unsigned int mutex=130) Line 223 + 0xe     C      libdb46d.dll!__memp_fclose(__db_mpoolfile * dbmfp=0x0035b3b8, unsigned int flags=0)  Line 891 + 0x17     C
     libdb46d.dll!__memp_sync_file(__db_env * dbenv=0x00358bb8, __mpoolfile * mfp=0x0038b558, void * argp=0x007afdf0, unsigned int * countp=0x00000000, unsigned int flags=0)  Line 758 + 0x11     C
     libdb46d.dll!__memp_walk_files(__db_env * dbenv=0x00358bb8, __mpool * mp=0x00380048, int (__db_env *, __mpoolfile *, void *, unsigned int *, unsigned int)* func=0x131105c0, void * arg=0x007afdf0, unsigned int * countp=0x00000000, unsigned int flags=256)  Line 58 + 0x17     C
     libdb46d.dll!__memp_sync_files(__db_env * dbenv=0x00358bb8)  Line 787 + 0x1d     C
     libdb46d.dll!__memp_sync_int(__db_env * dbenv=0x00358bb8, __db_mpoolfile * dbmfp=0x00000000, unsigned int trickle_max=0, unsigned int flags=4, unsigned int * wrote_totalp=0x00000000, int * interruptedp=0x00000000)  Line 624 + 0x9     C
     libdb46d.dll!__txn_checkpoint(__db_env * dbenv=0x00358bb8, unsigned int kbytes=0, unsigned int minutes=0, unsigned int flags=0)  Line 199 + 0x1f     C
     libdb46d.dll!__txn_checkpoint_pp(__db_env * dbenv=0x00358bb8, unsigned int kbytes=0, unsigned int minutes=0, unsigned int flags=0)  Line 80 + 0x80     C
     cs2tqr00.exe!checkpoint()  Line 1967 + 0x18     C
     cs2tqr00.exe!checkpoint_thread(void * data=0x00000000)  Line 2006     C
     msvcr71.dll!_threadstart(void * ptd=0x00322448)  Line 196 + 0x6     C
     kernel32.dll!7c80b683()      [b] verbose log [b]
D:\cs2\sys>rm db/*
D:\cs2\sys>ls db
D:\cs2\sys>cs2irr00&&cs2tqr00
cs2irr00
1002
license check passed
ILS Communications System for Windows NT Release 2.1.20
Copyright (c) ILS Technology 2001.  All Rights Reserved
SYSTEM FILE PATH = \cs2\sys\
BASE LOG ENTRIES = 100
CS2DQR00.NODE1    Initialization Successful
CS2ECR01.NODE1    Initialization Successful
CS2ECR00.NODE1    Initialization Successful
CS2STR00.NODE1    Initialization Successful
CS2TCR00.NODE1    Initialization Successful
CS2DMR00.NODE1    Initialization Successful
Test LDIT version 1.0
TESTLDIT.NODE1    Initialization Successful
Initialization Complete
cs2tqr00: Version 2.1.20i
compiled: Feb 11 2008, 12:50:34
cvs_ver=$Revision: 1.150 $, cvs_name=$Name:  $
Copyright (c) ILS Technology, LLC, 2004, 2005, 2006, 2007, 2008. All rights rese
rved.
fileops: stat d:\tmp
fileops: open \cs2/sys/db\__db.001
fileops: open \cs2/sys/db\__db.001
fileops: \cs2/sys/db\__db.001: close
fileops: \cs2/sys/db\__db.001: close
fileops: open \cs2/sys/db\__db.002
fileops: \cs2/sys/db\__db.002: close
fileops: open \cs2/sys/db\__db.003
fileops: \cs2/sys/db\__db.003: close
fileops: open \cs2/sys/db\__db.004
fileops: \cs2/sys/db\__db.004: close
fileops: open \cs2/sys/db\__db.005
fileops: \cs2/sys/db\__db.005: close
fileops: open \cs2/sys/db\__db.006
fileops: \cs2/sys/db\__db.006: close
fileops: open \cs2/sys/db\log.0000000001
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: stat \cs2/sys/db\winktab2_p0.db
fileops: stat \cs2/sys/db\winktab2_p0.db
fileops: stat \cs2/sys/db\__db.80000001.4e65e534
fileops: open \cs2/sys/db\__db.80000001.4e65e534
fileops: stat \cs2/sys/db\__db.80000001.4e65e534
fileops: open \cs2/sys/db\__db.80000001.4e65e534
fileops: \cs2/sys/db\__db.80000001.4e65e534: close
fileops: stat \cs2/sys/db\__db.80000001.4e65e534
fileops: stat \cs2/sys/db\__db.80000001.4e65e534
fileops: \cs2/sys/db\__db.80000001.4e65e534: close
fileops: stat \cs2/sys/db\winktab2_p0.db
fileops: stat \cs2/sys/db\__db.80000001.4e65e534
fileops: stat \cs2/sys/db\winktab2_p0.db
fileops: rename \cs2/sys/db\__db.80000001.4e65e534 to \cs2/sys/db\winktab2_p0.db
fileops: stat \cs2/sys/db\winktab2_p0.db
fileops: open \cs2/sys/db\winktab2_p0.db
fileops: stat \cs2/sys/db\winktab2_s1.db
fileops: stat \cs2/sys/db\winktab2_s1.db
fileops: stat \cs2/sys/db\__db.80000001.481fe844
fileops: open \cs2/sys/db\__db.80000001.481fe844
fileops: stat \cs2/sys/db\__db.80000001.481fe844
fileops: open \cs2/sys/db\__db.80000001.481fe844
fileops: \cs2/sys/db\__db.80000001.481fe844: close
fileops: stat \cs2/sys/db\__db.80000001.481fe844
fileops: stat \cs2/sys/db\__db.80000001.481fe844
fileops: \cs2/sys/db\__db.80000001.481fe844: close
fileops: stat \cs2/sys/db\winktab2_s1.db
fileops: stat \cs2/sys/db\__db.80000001.481fe844
fileops: stat \cs2/sys/db\winktab2_s1.db
fileops: rename \cs2/sys/db\__db.80000001.481fe844 to \cs2/sys/db\winktab2_s1.db
fileops: stat \cs2/sys/db\winktab2_s1.db
fileops: open \cs2/sys/db\winktab2_s1.db
fileops: stat \cs2/sys/db\winktab2_s2.db
fileops: stat \cs2/sys/db\winktab2_s2.db
fileops: stat \cs2/sys/db\__db.80000001.52ba3c93
fileops: open \cs2/sys/db\__db.80000001.52ba3c93
fileops: stat \cs2/sys/db\__db.80000001.52ba3c93
fileops: open \cs2/sys/db\__db.80000001.52ba3c93
fileops: \cs2/sys/db\__db.80000001.52ba3c93: close
fileops: stat \cs2/sys/db\__db.80000001.52ba3c93
fileops: stat \cs2/sys/db\__db.80000001.52ba3c93
fileops: \cs2/sys/db\__db.80000001.52ba3c93: close
fileops: stat \cs2/sys/db\winktab2_s2.db
fileops: stat \cs2/sys/db\__db.80000001.52ba3c93
fileops: stat \cs2/sys/db\winktab2_s2.db
fileops: rename \cs2/sys/db\__db.80000001.52ba3c93 to \cs2/sys/db\winktab2_s2.db
fileops: stat \cs2/sys/db\winktab2_s2.db
fileops: open \cs2/sys/db\winktab2_s2.db
fileops: stat \cs2/sys/db\winktab2_s3.db
fileops: stat \cs2/sys/db\winktab2_s3.db
fileops: stat \cs2/sys/db\__db.80000001.5cbd6796
fileops: open \cs2/sys/db\__db.80000001.5cbd6796
fileops: stat \cs2/sys/db\__db.80000001.5cbd6796
fileops: open \cs2/sys/db\__db.80000001.5cbd6796
fileops: \cs2/sys/db\__db.80000001.5cbd6796: close
fileops: stat \cs2/sys/db\__db.80000001.5cbd6796
fileops: stat \cs2/sys/db\__db.80000001.5cbd6796
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: \cs2/sys/db\__db.80000001.5cbd6796: close
fileops: stat \cs2/sys/db\winktab2_s3.db
fileops: stat \cs2/sys/db\__db.80000001.5cbd6796
fileops: stat \cs2/sys/db\winktab2_s3.db
fileops: rename \cs2/sys/db\__db.80000001.5cbd6796 to \cs2/sys/db\winktab2_s3.db
fileops: stat \cs2/sys/db\winktab2_s3.db
fileops: open \cs2/sys/db\winktab2_s3.db
fileops: stat \cs2/sys/db\winktab2_s4.db
fileops: stat \cs2/sys/db\winktab2_s4.db
fileops: stat \cs2/sys/db\__db.80000001.63ac4b2c
fileops: open \cs2/sys/db\__db.80000001.63ac4b2c
fileops: stat \cs2/sys/db\__db.80000001.63ac4b2c
fileops: open \cs2/sys/db\__db.80000001.63ac4b2c
fileops: \cs2/sys/db\__db.80000001.63ac4b2c: close
fileops: stat \cs2/sys/db\__db.80000001.63ac4b2c
fileops: stat \cs2/sys/db\__db.80000001.63ac4b2c
fileops: \cs2/sys/db\__db.80000001.63ac4b2c: close
fileops: stat \cs2/sys/db\winktab2_s4.db
fileops: stat \cs2/sys/db\__db.80000001.63ac4b2c
fileops: stat \cs2/sys/db\winktab2_s4.db
fileops: rename \cs2/sys/db\__db.80000001.63ac4b2c to \cs2/sys/db\winktab2_s4.db
fileops: stat \cs2/sys/db\winktab2_s4.db
fileops: open \cs2/sys/db\winktab2_s4.db
fileops: stat \cs2/sys/db\winktab2_s5.db
fileops: stat \cs2/sys/db\winktab2_s5.db
fileops: stat \cs2/sys/db\__db.80000001.6da6e34c
fileops: open \cs2/sys/db\__db.80000001.6da6e34c
fileops: stat \cs2/sys/db\__db.80000001.6da6e34c
fileops: open \cs2/sys/db\__db.80000001.6da6e34c
fileops: \cs2/sys/db\__db.80000001.6da6e34c: close
fileops: stat \cs2/sys/db\__db.80000001.6da6e34c
fileops: stat \cs2/sys/db\__db.80000001.6da6e34c
fileops: \cs2/sys/db\__db.80000001.6da6e34c: close
fileops: stat \cs2/sys/db\winktab2_s5.db
fileops: stat \cs2/sys/db\__db.80000001.6da6e34c
fileops: stat \cs2/sys/db\winktab2_s5.db
fileops: rename \cs2/sys/db\__db.80000001.6da6e34c to \cs2/sys/db\winktab2_s5.db
fileops: stat \cs2/sys/db\winktab2_s5.db
fileops: open \cs2/sys/db\winktab2_s5.db
chk_cursors: 0 cursors dupped
chk_cursors: 0 cursors closed
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
chk_cursors: 0 cursors dupped
chk_cursors: 0 cursors dupped
chk_cursors: 0 cursors dupped
chk_cursors: 0 cursors dupped
chk_cursors: 0 cursors dupped
chk_cursors: 0 cursors dupped
chk_cursors: 0 cursors dupped
chk_cursors: 0 cursors dupped
chk_cursors: 0 cursors dupped
chk_cursors: 0 cursors dupped
chk_cursors: 0 cursors dupped
chk_cursors: 0 cursors dupped
chk_cursors: 0 cursors dupped
chk_cursors: 0 cursors closed
fileops: \cs2/sys/db\winktab2_p0.db: close
fileops: \cs2/sys/db\winktab2_s1.db: close
fileops: \cs2/sys/db\winktab2_s2.db: close
fileops: \cs2/sys/db\winktab2_s3.db: close
fileops: stat \cs2/sys/db\winktab2_s3.db
fileops: open \cs2/sys/db\winktab2_s3.db
fileops: \cs2/sys/db\winktab2_s4.db: close
fileops: \cs2/sys/db\winktab2_s3.db: close
fileops: stat \cs2/sys/db\winktab2_s2.db
fileops: open \cs2/sys/db\winktab2_s2.db
fileops: \cs2/sys/db\winktab2_s5.db: close
fileops: stat \cs2/sys/db\winktab2_p0.db
fileops: stat \cs2/sys/db\winktab2_p0.db
fileops: open \cs2/sys/db\winktab2_p0.db
fileops: \cs2/sys/db\winktab2_p0.db: close
fileops: stat \cs2/sys/db\winktab2_p0.db
fileops: open \cs2/sys/db\winktab2_p0.db
fileops: stat \cs2/sys/db\winktab2_s1.db
fileops: stat \cs2/sys/db\winktab2_s1.db
fileops: open \cs2/sys/db\winktab2_s1.db
fileops: \cs2/sys/db\winktab2_s1.db: close
fileops: stat \cs2/sys/db\winktab2_s1.db
fileops: open \cs2/sys/db\winktab2_s1.db
fileops: stat \cs2/sys/db\winktab2_s2.db
fileops: stat \cs2/sys/db\winktab2_s2.db
fileops: open \cs2/sys/db\winktab2_s2.db
fileops: \cs2/sys/db\winktab2_s2.db: close
fileops: \cs2/sys/db\winktab2_s2.db: close
fileops: stat \cs2/sys/db\winktab2_s2.db
fileops: open \cs2/sys/db\winktab2_s2.db
fileops: stat \cs2/sys/db\winktab2_s4.db
fileops: open \cs2/sys/db\winktab2_s4.db
fileops: stat \cs2/sys/db\winktab2_s3.db
fileops: stat \cs2/sys/db\winktab2_s3.db
fileops: open \cs2/sys/db\winktab2_s3.db
fileops: \cs2/sys/db\winktab2_s3.db: close
fileops: stat \cs2/sys/db\winktab2_s3.db
fileops: open \cs2/sys/db\winktab2_s3.db
fileops: stat \cs2/sys/db\winktab2_s4.db
fileops: stat \cs2/sys/db\winktab2_s4.db
fileops: open \cs2/sys/db\winktab2_s4.db
fileops: \cs2/sys/db\winktab2_s4.db: close
fileops: \cs2/sys/db\winktab2_s4.db: close
fileops: stat \cs2/sys/db\winktab2_s4.db
fileops: open \cs2/sys/db\winktab2_s4.db
fileops: stat \cs2/sys/db\winktab2_s5.db
fileops: stat \cs2/sys/db\winktab2_s5.db
fileops: open \cs2/sys/db\winktab2_s5.db
fileops: \cs2/sys/db\winktab2_s5.db: close
fileops: stat \cs2/sys/db\winktab2_s5.db
fileops: open \cs2/sys/db\winktab2_s5.db
chk_cursors: 0 cursors dupped
chk_cursors: 0 cursors dupped
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
chk_cursors: 0 cursors closed
fileops: \cs2/sys/db\winktab2_p0.db: close
fileops: \cs2/sys/db\winktab2_s1.db: close
fileops: stat \cs2/sys/db\winktab2_p0.db
fileops: open \cs2/sys/db\winktab2_p0.db
fileops: \cs2/sys/db\winktab2_s2.db: close
fileops: \cs2/sys/db\winktab2_p0.db: close
fileops: stat \cs2/sys/db\winktab2_s1.db
fileops: open \cs2/sys/db\winktab2_s1.db
fileops: \cs2/sys/db\winktab2_s3.db: close
fileops: \cs2/sys/db\winktab2_s1.db: close
fileops: \cs2/sys/db\winktab2_s4.db: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\winktab2_s5.db: close
fileops: \cs2/sys/db\log.0000000001: close
fileops: stat \cs2/sys/db\winktab2_s5.db
fileops: open \cs2/sys/db\winktab2_s5.db
fileops: \cs2/sys/db\winktab2_s5.db: close
fileops: stat \cs2/sys/db\winktab2_s3.db
fileops: open \cs2/sys/db\winktab2_s3.db
fileops: \cs2/sys/db\winktab2_s3.db: close
fileops: stat \cs2/sys/db\winktab2_s2.db
fileops: open \cs2/sys/db\winktab2_s2.db
fileops: \cs2/sys/db\winktab2_s2.db: close
fileops: stat \cs2/sys/db\winktab2_s4.db
fileops: open \cs2/sys/db\winktab2_s4.db
fileops: \cs2/sys/db\winktab2_s4.db: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: stat \cs2/sys/db\winktab2_p0.db
fileops: stat \cs2/sys/db\winktab2_p0.db
fileops: open \cs2/sys/db\winktab2_p0.db
fileops: \cs2/sys/db\winktab2_p0.db: close
fileops: stat \cs2/sys/db\winktab2_p0.db
fileops: open \cs2/sys/db\winktab2_p0.db
fileops: stat \cs2/sys/db\winktab2_s1.db
fileops: stat \cs2/sys/db\winktab2_s1.db
fileops: open \cs2/sys/db\winktab2_s1.db
fileops: \cs2/sys/db\winktab2_s1.db: close
fileops: stat \cs2/sys/db\winktab2_s1.db
fileops: open \cs2/sys/db\winktab2_s1.db
fileops: stat \cs2/sys/db\winktab2_s2.db
fileops: stat \cs2/sys/db\winktab2_s2.db
fileops: open \cs2/sys/db\winktab2_s2.db
fileops: \cs2/sys/db\winktab2_s2.db: close
fileops: stat \cs2/sys/db\winktab2_s2.db
fileops: open \cs2/sys/db\winktab2_s2.db
fileops: stat \cs2/sys/db\winktab2_s3.db
fileops: stat \cs2/sys/db\winktab2_s3.db
fileops: open \cs2/sys/db\winktab2_s3.db
fileops: \cs2/sys/db\winktab2_s3.db: close
fileops: stat \cs2/sys/db\winktab2_s3.db
fileops: open \cs2/sys/db\winktab2_s3.db
fileops: stat \cs2/sys/db\winktab2_s4.db
fileops: stat \cs2/sys/db\winktab2_s4.db
fileops: open \cs2/sys/db\winktab2_s4.db
fileops: \cs2/sys/db\winktab2_s4.db: close
fileops: stat \cs2/sys/db\winktab2_s4.db
fileops: open \cs2/sys/db\winktab2_s4.db
fileops: stat \cs2/sys/db\winktab2_s5.db
fileops: stat \cs2/sys/db\winktab2_s5.db
fileops: open \cs2/sys/db\winktab2_s5.db
fileops: \cs2/sys/db\winktab2_s5.db: close
fileops: stat \cs2/sys/db\winktab2_s5.db
fileops: open \cs2/sys/db\winktab2_s5.db
chk_cursors: 0 cursors dupped
chk_cursors: 0 cursors closed
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
fileops: open \cs2/sys/db\log.0000000001
fileops: \cs2/sys/db\log.0000000001: close
chk_cursors: 0 cursors dupped
chk_cursors: 0 cursors dupped
chk_cursors: 0 cursors dupped
chk_cursors: 0 cursors dupped
chk_cursors: 0 cursors dupped
chk_cursors: 0 cursors dupped
chk_cursors: 0 cursors dupped
chk_cursors: 0 cursors dupped
chk_cursors: 0 cursors dupped
chk_cursors: 0 cursors dupped
chk_cursors: 0 cursors dupped
chk_cursors: 0 cursors dupped
chk_cursors: 0 cursors dupped
chk_cursors: 0 cursors closed
fileops: \cs2/sys/db\winktab2_p0.db: close
fileops: \cs2/sys/db\winktab2_s1.db: close
fileops: \cs2/sys/db\winktab2_s2.db: close
fileops: \cs2/sys/db\winktab2_s3.db: close
fileops: \cs2/sys/db\winktab2_s4.db: close
fileops: stat \cs2/sys/db\winktab2_p0.db
fileops: stat \cs2/sys/db\winktab2_p0.db
fileops: open \cs2/sys/db\winktab2_p0.db
fileops: \cs2/sys/db\winktab2_p0.db: close
fileops: stat \cs2/sys/db\winktab2_p0.db
fileops: open \cs2/sys/db\winktab2_p0.db
fileops: stat \cs2/sys/db\winktab2_s1.db
fileops: stat \cs2/sys/db\winktab2_s1.db
fileops: open \cs2/sys/db\winktab2_s1.db
fileops: \cs2/sys/db\winktab2_s1.db: close
fileops: stat \cs2/sys/db\winktab2_s1.db
fileops: open \cs2/sys/db\winktab2_s1.db
fileops: stat \cs2/sys/db\winktab2_s2.db
fileops: stat \cs2/sys/db\winktab2_s2.db
fileops: open \cs2/sys/db\winktab2_s2.db
fileops: \cs2/sys/db\winktab2_s2.db: close
fileops: stat \cs2/sys/db\winktab2_s2.db
fileops: open \cs2/sys/db\winktab2_s2.db
fileops: stat \cs2/sys/db\winktab2_s3.db
fileops: stat \cs2/sys/db\winktab2_s3.db
fileops: open \cs2/sys/db\winktab2_s3.db
fileops: \cs2/sys/db\winktab2_s5.db: close
fileops: \cs2/sys/db\winktab2_s3.db: close
fileops: stat \cs2/sys/db\winktab2_s3.db
fileops: open \cs2/sys/db\winktab2_s3.db
fileops: stat \cs2/sys/db\winktab2_s4.db
fileops: stat \cs2/sys/db\winktab2_s4.db
fileops: open \cs2/sys/db\winktab2_s4.db
fileops: \cs2/sys/db\winktab2_s4.db: close
fileops: stat \cs2/sys/db\winktab2_s4.db
fileops: open \cs2/sys/db\winktab2_s4.db
fileops: stat \cs2/sys/db\winktab2_s5.db
fileops: stat \cs2/sys/db\winktab2_s5.db
fileops: open \cs2/sys/db\winktab2_s5.db
fileops: \cs2/sys/db\winktab2_s5.db: close

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    ::statusdebugging crash dump vmcore.0 (64-bit) from x4500-13.unix
    operating system: 5.10 Generic_144489-10 (i86pc)
    panic message: BAD TRAP: type=8 (#df Double fault) rp=ffffffffc4abff10 addr=0
    dump content: kernel pages only
    ::showrevHostname: x4500-13.unix
    Release: 5.10
    Kernel architecture: i86pc
    Application architecture: amd64
    Kernel version: SunOS 5.10 i86pc Generic_144489-10
    Platform: i86pc
    $<msgbufMESSAGE                                                              
    fffffe80010a2ca8 dtrace:dtrace_dynvar+730 ()
      >> warning! 8-byte aligned %fp = fffffe80010a2d78
    fffffe80010a2d78 dtrace:dtrace_dynvar+730 ()
      >> warning! 8-byte aligned %fp = fffffe80010a2e48
    ......snip...
      >> warning! 8-byte aligned %fp = fffffe80010a5948
    fffffe80010a5948 dtrace:dtrace_probe+606 ()
      >> warning! 8-byte aligned %fp = fffffe80010a5968
    fffffe80010a5968 fbt:fbt_invop+a8 ()
      >> warning! 8-byte aligned %fp = fffffe80010a5998
    fffffe80010a5998 unix:dtrace_invop+3b ()
    fffffe80010a5ae0 unix:invoptrap+108 ()
    fffffe80010a5b30 genunix:fop_getpage+47 ()
    fffffe80010a5d00 genunix:segvn_fault+8b0 ()
    fffffe80010a5dc0 genunix:as_fault+205 ()
    fffffe80010a5e20 unix:pagefault+8b ()
    fffffe80010a5f00 unix:trap+3d7 ()
    fffffe80010a5f10 unix:cmntrap+140 () 
    ::panicinfo             cpu                9
              thread fffffe88e5265180
             message BAD TRAP: type=8 (#df Double fault) rp=ffffffffc4abff10 addr=0
                 rdi fffffe8f5496fa70
                 rsi                2
                 rdx fffffe80010a5768
    fffffe88e5265180::walk thread fffffe8946f791e8
    mdb: failed to read thread at 100000000: no mapping for address
    ::psS    PID   PPID   PGID    SID    UID      FLAGS             ADDR NAME
    R      0      0      0      0      0 0x00000001 fffffffffbc273c0 sched
    R     77      0      0      0      0 0x00020001 ffffffffc9e73c80 zpool-zpool1
    R      3      0      0      0      0 0x00020001 ffffffffc1f86e10 fsflush
    R      2      0      0      0      0 0x00020001 ffffffffc1f87a78 pageout
    R      1      0      0      0      0 0x4a004000 ffffffffc1f886e0 init
    R  17651      1  17651  17635      0 0x4a014000 fffffe88d4b8e030 bash
    R  14059  17651  17651  17635      0 0x4a004000 fffffe8ab1817e60 head
    R  14058  17651  17651  17635      0 0x4a004000 fffffe8946f791e8 sort
    R  14057  17651  17651  17635      0 0x4a004000 fffffe88dc9aa040 awk
    R  14056  17651  17651  17635      0 0x4a004000 ffffffffc5a9f6e8 ps
    R   3534      1   3534   3508      0 0x4a014000 fffffe8ab126dcb8 bash
    R   3535   3534   3535   3508      0 0x4a004000 fffffe88dc9b6710 dtrace
    R    431      1    431    431      0 0x42000000 fffffe88dc9b2908 fmd
    R    458      1    458    458  60001 0x52000000 fffffe88d4b95028 nrpe
    R    441      1    441    441     25 0x52010000 fffffe88dc9b1ca0 sendmail
    R    440      1    439    439      0 0x42000000 fffffe88dc9aeab0 snmpd
    R    438      1    438    438      0 0x42000000 fffffe88dc9ad1e0 dmispd
    R    424      1    424    424      1 0x42000000 fffffe88d4b968f8 nfsd
    R    415      1    415    415      0 0x42000000 ffffffffc5a9ea80 mountd
    R    406      1    406    406      0 0x42010000 fffffe88c3d40020 snmpdx
    R    390      1    390    390      0 0x4a014000 ffffffffc1f861a8 vold
    R    381      1    381    381      0 0x42000000 fffffe88c3d456f8 sshd
    R  15695    381    381    381      0 0x42010000 fffffe8946f77918 sshd
    R  15696  15695    381    381    219 0x52010000 fffffe8ab1819730 sshd
    R  15702  15696  15702  15702    219 0x4a014000 fffffe88d4b90568 bash
    R   6927    381    381    381      0 0x42010000 ffffffffc9e748e8 sshd
    R   6928   6927    381    381    159 0x52010000 fffffe8946f76048 sshd
    R   6934   6928   6934   6934    159 0x4a014000 ffffffffc5a9ac78 bash
    R    312      1    312    312      0 0x42000000 fffffe88dc9b3570 syslogd
    R    306      1    306    306      1 0x42000000 fffffe88dc9b4e40 lockd
    R    297      1    297    297      0 0x42000000 ffffffffc5a9c548 utmpd
    R    270      1    270    270      0 0x42000000 ffffffffc9e75550 inetd
    R    254      1    250    250      1 0x42000000 ffffffffc1f848d8 nfs4cbd
    R    253      1    253    253      1 0x42000000 fffffe88c3d46360 statd
    R    252      1    252    252      1 0x52000000 fffffe88d4b911d0 nfsmapid
    R    247      1    247    247      1 0x42000000 fffffe88d4b94370 rpcbind
    R    246      1    246    246      0 0x42010000 fffffe88c3d40c88 cron
    R    225      1    225    225      0 0x42010000 fffffe88d4b9b368 xntpd
    R    180      1    178    178      0 0x42000000 fffffe88d4b981c8 iscsid
    R    147      1    147    147      0 0x42000000 fffffe88d4b97560 picld
    R    143      1    143    143      1 0x42000000 fffffe88d4b9a700 kcfd
    R    134      1    134    134      0 0x42000000 fffffe88c3d42558 syseventd
    R    141      1    141    141      0 0x42000000 fffffe88d4b98e30 nscd
    R     54      1     54     54      0 0x42000000 ffffffffc9e77a88 devfsadm
    R     11      1     11     11      0 0x42000000 ffffffffc1f83c70 svc.configd
    R      9      1      9      9      0 0x42000000 ffffffffc1f85540 svc.startd
    R    286      9    286    286      0 0x4a004000 fffffe88dc9b7378 sh
    R    261      9    261    261      0 0x4a014000 fffffe88d4b8f900 sac
    R    305    261    261    261      0 0x4a014000 fffffe88d4b91e38 ttymon
    R      5      0      0      0      0 0x00020001 ffffffffc1f89348 zpool-zbootDouble Fault could perhaps indicate that we have stack overflow in the kernel? Can I use mdb to dump all the currently-used-stack memory, and collect that data to see if there is a leak? I could also double the stacksize and see if the period between trouble also doubles.
    Any other suggestions which may help in locating the troubles we are seeing?

    SteveS,
    Thanks for the reply. I have handed it off to the local support, and believe they have forward it to Oracle Japan. Possible, it goes through a lot of language translation, so it is a little like playing Telephone.
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    This is the output I get
    ::cpuinfo -v                 
    ID ADDR        FLG NRUN BSPL PRI RNRN KRNRN SWITCH THREAD      PROC
      0 fffffffffbc29320  1f    1    0  -1   no    no t-3    fffffe8000005c60
    (idle)
                      |    |
           RUNNING <--+    +-->  PRI THREAD      PROC
             READY                60 fffffe80000b9c60 sched
          QUIESCED        
            EXISTS        
            ENABLE        
    ID ADDR        FLG NRUN BSPL PRI RNRN KRNRN SWITCH THREAD      PROC
      1 ffffffffc3af2000  1f    1    0  -1   no    no t-3    fffffe80003bec60
    (idle)
                      |    |
           RUNNING <--+    +-->  PRI THREAD      PROC
             READY                60 fffffe800014fc60 sched
          QUIESCED        
            EXISTS        
            ENABLE        
    ID ADDR        FLG NRUN BSPL PRI RNRN KRNRN SWITCH THREAD      PROC
      2 fffffffffbc310a0  1b    1    0  -1   no    no t-81   fffffe8000470c60
    (idle)
                      |    |
           RUNNING <--+    +-->  PRI THREAD      PROC
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          QUIESCED        
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           RUNNING <--+   
             READY        
          QUIESCED        
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