Observer DG trigger SIGSEGV address not mapped for errors in the alerts log

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• Exception [type: SIGSEGV, address not mapped to object]

  Hello
  I'm working on a database of Oracle 11 g Release 11.1.0.6.0 - 64 bit Production With the Real Application Clusters option.
  
  I am trying to execute the following:
  

        SELECT /*+ CURSOR_SHARING_EXACT */
               vc.id_vehicle, gr.geoRouteId, g.name, round(g.length) length_, gr.active, 
               g.id_user id_user_georoute_owner, gr.grBindUserId id_user_bind_owner,
               (SELECT count(*) FROM dual WHERE XMLEXISTS('$XML_ALM/user/alarmwhen[@direction="out"]' passing gr.geoRouteUser AS "XML_ALM") = 1) alm_out
          FROM configurator.t_vehicle_configuration vc, dispatch.v_georoute g,
               xmltable('$XML/vehicleconf/GeoRoute/geoRoute[@active="1"]' 
                 passing vc.x_configuration AS "XML"
                 columns geoRouteId   number  path '@id',
                         active       number  path '@active',
                         grBindUserId number  path '@id_user',
                         geoRouteUser xmltype path 'user'
               ) gr
         WHERE vc.id_vehicle = 453
           AND g.id_georoute = gr.geoRouteId;

  but after a few seconds, I got the error in the object.
  The alert log says:
  
  + Exception [type: SIGSEGV, address not mapped to object] [ADDR:0 x 38] [PC:0x483CEFD, evahtr () + 495] +.
  Errors in the /u01/app/oracle/diag/rdbms/evodb/EVODB2/trace/EVODB2_ora_13769.trc file (incident = 301686):
  + ORA-07445: exception encountered: core dump [evahtr () + 495] [SIGSEGV] [ADDR:0 x 38] [PC:0x483CEFD] [address not mapped to object] [] +.
  Incident details in: /u01/app/oracle/diag/rdbms/evodb/EVODB2/incident/incdir_301686/EVODB2_ora_13769_i301686.trc
  
  The trace says:
  
  + ORA-07445: exception encountered: core dump [evahtr () + 495] [SIGSEGV] [ADDR:0 x 38] [PC:0x483CEFD] [address not mapped to object] [] +.
  
  += == Dump for incident 301686 (ORA 7445 [evahtr () + 495]) = +.
  -Beginning of Incident custom Dump (s)-
  + Exception [type: SIGSEGV, address not mapped to object] [ADDR:0 x 38] [PC:0x483CEFD, evahtr () + 495] +.
  
  Weird stuff, is that if I remove the
  
  (SELECT count (*) OF double WHERE XMLEXISTS (' $XML_ALM/user/alarmwhen [@direction = "out"]' in passing gr.geoRouteUser AS "XML_ALM") = 1) alm_out
  
  of the application, there is no problem.
  
  Do you have any suggestions?
  
  Thanks in advance,
  Samuel

  Weird stuff, is that if I remove the

  (SELECT count (*) OF double WHERE XMLEXISTS (' $XML_ALM/user/alarmwhen [@direction = "out"]' in passing gr.geoRouteUser AS "XML_ALM") = 1) alm_out

  of the application, there is no problem.

  It is probably because you are not using XMLExists correctly.

  The function returns a Boolean value if you don't need to test 1 or 0 as needed with function existsNode before:

  http://download.Oracle.com/docs/CD/B28359_01/AppDev.111/b28369/xdb04cre.htm#sthref360

  It is also preferable to use an expression BOX instead of a subquery:

  SELECT /*+ CURSOR_SHARING_EXACT */
         vc.id_vehicle
       , gr.geoRouteId
       , g.name
       , round(g.length) length_
       , gr.active
       , g.id_user id_user_georoute_owner
       , gr.grBindUserId id_user_bind_owner
       , case when XMLExists('$XML_ALM/user/alarmwhen[@direction="out"]' passing gr.geoRouteUser AS "XML_ALM")
              then 1
              else 0
         end as alm_out
  FROM configurator.t_vehicle_configuration vc
     , dispatch.v_georoute g
     , xmltable('$XML/vehicleconf/GeoRoute/geoRoute[@active="1"]'
                 passing vc.x_configuration AS "XML"
                 columns geoRouteId   number  path '@id',
                         active       number  path '@active',
                         grBindUserId number  path '@id_user',
                         geoRouteUser xmltype path 'user'
       ) gr
  WHERE vc.id_vehicle = 453
  AND g.id_georoute = gr.geoRouteId
  ;
  

  Better yet, you can directly test the condition in the clause of COLUMNS with fn: there is the XPath function.
  For example, something like this:

  SQL> with sample_data as (
    2    select xmltype('
    3  1
    4  2
    5  3
    6  ') doc
    7    from dual
    8  )
    9  select x.*
   10  from sample_data t
   11     , xmltable(
   12         '/root/row'
   13         passing t.doc
   14         columns item number path 'item',
   15                 flag number path 'exists(other[@id="x"])'
   16       ) x
   17  ;
  
        ITEM       FLAG
  ---------- ----------
           1          1
           2          0
           3          0
   
  

• [ORA-07445: exception encountered: core dump [xsobjdmp_alcb () + 18] [SIGSEGV] [address not mapped to object] [0 x 638] []]

  Hello

  My database is running on 10.2.0.4.0

  Face an ora 07445 and error ora-600, that is

  [ORA-07445: exception encountered: core dump [xsobjdmp_alcb () + 18] [SIGSEGV] [address not mapped to object] [0 x 638] []]

  [ORA-00600: internal error code, arguments: [XSOOPS], [xsbaClose01], [] [] [], [], [],]

  Can someone tell me how to solve

  What are the meaning of these arguments [xsobjdmp_alcb () + 18] [SIGSEGV], [XSOOPS], [xsbaClose01]

  Kind regards

  Uxii

  ORA-600/7445 errors are associated with any trace files that gives many details on these errors. Before triggering the SR keep those handy also.

  concerning

  Pravin

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