debug tuxedo services using dbx

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1. find out theserver process id.

v490i1:/opt/app/tuxapp/tuxopq$ pgrepopfqdb

23859

23889

23890

We have 3 identical servers, the serverhave 2 copies as its backup.

2. find outwhich of the 3 servers will be the active process(normally the median pid number,it’s up to the internal load balance algorithm in Tuxedo), and attach dbx toit:

(/opt/SUNWspro/bin/../WS6U2/bin/sparcv9/dbx)attach 23889

Attached to process 23889

stopped in __systemcall at0xfe120080

0xfe120080:__systemcall+0x0030: ta 0x8

In fact, there is a way to predict whichwill be the active process to handle the next request rather than guessing.

(1) send a request to the service

(2) observe the output of ‘psr’ in tmadmin,see which opfqdb process handles this request. This server process is the onewe should attach dbx to.

another way is to modify your UBB and boot only one process to debug.

3. set thebreak point to get control on the server:

(/opt/SUNWspro/bin/../WS6U2/bin/sparcv9/dbx)file opfqpc.c

(/opt/SUNWspro/bin/../WS6U2/bin/sparcv9/dbx)stop at 703

(2) stop at"opfqpc.c":703

4. send arequest to the server. It will be stopped when it reaches the breakpoint. Youhave got complete control over the server now!

(/opt/SUNWspro/bin/../WS6U2/bin/sparcv9/dbx)cont

stopped in OPFQ_ctl_DBselect atline 703 in file"opfqpc.c"

703 strcpy(opfq->sqlstep,"PREPARESELECT OPFQ_QUE_CTL");

(/opt/SUNWspro/bin/../WS6U2/bin/sparcv9/dbx)print opfq

opfq = 0xffbf4218

(/opt/SUNWspro/bin/../WS6U2/bin/sparcv9/dbx) print *opfq

*opfq = {

itm_nbr = 0.0

city_cd = "BJS"

offc_nbr = 187

rsn_cd = "RE"

ori_rsn_cd = "RE"

rsn_cd_nbr = 28

que_desc = "PSGR REBOOK"

offc_count = 0

agt_nbr = 0

que_agt_nbr = 8888

que_pid = 30426

que_airl = "1E"

row = 0

que_offc_cd = "TV"

que_crt_dt_mf = "14SEP08094523"

que_cont_typ = 8

que_itm_typ = 1

que_itm_count = 0

txn_id = "QE"

run_id = "*3K$YC"

pnr_crt_dt = ""

que_cont ="aaaaaaaaaaaaaaa/015FROM AGENT 8888 PID30426 PEK099 1559 14/09/08 "

func = ""

que_ctl_count = 0

que_ctl_nbr = 0.0

sqlstep = 0x2630b8 ""

sqlcode = 0

sqllog = ""

sqlerror = ""

}

(/opt/SUNWspro/bin/../WS6U2/bin/sparcv9/dbx)next

stopped in OPFQ_ctl_DBselect atline 704 in file"opfqpc.c"

704 opfq->sqlcode = sqlca.sqlcode;