INFORMIX SERVER / 5725A3900 / C10 - IDS 12.10

After network issues caused HDR to be shutdown, the act of
reconnecting the primary to hdr
led to continually hung threads on both the primary and
secondary that never released and
prevented HDR from syncing back up.

On the primary, the dr_prsend thread was observed waiting for
dr_gettype thread that was stuck:

    Thread CPU Info:
     tid    name              vp       Last Run           CPU
Time     #scheds    status

     147     dr_prsend         8cpu    10/12 10:03:51
65.1068    1977253    join wait  3679913
     3679913 dr_gettype        9cpu    10/12 19:11:09
0.2838      33084    cond wait  smx pipe1

The stack thread of dr_gettype thread showed it stuck in
smx_connect:

    Stack for thread: 3679913 dr_gettype
     base: 0x000000015098d000
      len:   69632
       pc: 0x00000001012c63c0
      tos: 0x000000015099cdd1
    state: cond wait
       vp: 10

    oninit :: yield_processor_mvp
    oninit :: mt_wait
    oninit :: smx_connect
    oninit :: SC_smx_sporadic_connect
    oninit :: SC_maxmsg_ping
    oninit :: GetServerVersionInfo
    oninit :: verify_server_version
    oninit :: dr_whattype
    oninit :: startup

At the same time, on the HDR side, there was a dr_accept thread
that was also hung and it's stack was:

   Stack for thread: 47176 dr_accept

    oninit :: yield_processor_mvp
    oninit :: mt_wait
    oninit :: net_buf_get
    oninit :: recvtli
    oninit :: slSQIrecv
    oninit :: pfRecv
    oninit :: asfRecv
    oninit :: ASF_Call
    oninit :: rsasf_recv_buf
    oninit :: rsasf_recv_with_timeout
    oninit :: dr_asf_recv_with_timeout
    oninit :: dr_session_recv_with_timeout
    oninit :: dr_acceptInt
    oninit :: dr_accept
    oninit :: listen_verify
    oninit :: spawn_thread
    oninit :: th_init_initgls

In this scenario, both the HDR dr_accept thread and the primary
dr_gettype threads had been hung
for over 9 hours.  Restarting the HDR secondary did not release
the dr_gettype thread on the primary and
the primary had to be restarted to sync HDR back up.

****************************************************************
* USERS AFFECTED:                                              *
* Users of IDS 12.10.xC10 and earlier versions.                *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* HDR primary dr_gettype thread and secondary dr_accept        *
* threads can hang attempting to reconnect after DR:Turned off *
* on primary server.                                           *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************

keiner bekannt / siehe Local-Fix

Datum - Problem gemeldet    :
Datum - Problem geschlossen :
Datum - der letzten Änderung:

24.12.2018
07.10.2019
07.10.2019

12.10.xC11