Using XML sequence Tag with updatexml() errors when called as function?

Question

Hello,
I'm having a very difficult time with this error. I was hoping someone could shed some light onto why this is happening. It is 100% reproducible on my end. When I run the problematic code, I am given a "ORA-03113: end-of-file on communication channel" which is actually due to
"ORA-07445: exception encountered: core dump [kolasaRead()+66] [SIGSEGV] [ADDR:0x64] [PC:0x2250968] [Address not mapped to object] []"
Set up scripts:*
CREATE TABLE test (id   NUMBER
                        ,xml  XMLTYPE);
CREATE OR REPLACE FUNCTION test_replace_metadata(p_metadata                 IN XMLTYPE)
      RETURN XMLTYPE
   IS
      l_metadata_xml                          XMLTYPE;
   BEGIN
      l_metadata_xml := p_metadata;
      SELECT UPDATEXML(l_metadata_xml
                      ,'/DICOM_OBJECT/*[@tag="00100020"]/text()'
                      ,'1010101010101010101'
                      ,'xmlns="http://xmlns.oracle.com/ord/dicom/metadata_1_0"')
        INTO l_metadata_xml
        FROM DUAL;
      RETURN l_metadata_xml; 
  END test_replace_metadata;
To select the resulting rows:*
select rownum
           ,id
           ,xml
           --,var
           ,TO_CHAR(EXTRACTVALUE(xml
               ,'/DICOM_OBJECT/*[@name="Patient ID"]'
               ,'xmlns=http://xmlns.oracle.com/ord/dicom/metadata_1_0')) "PatientID"
       from test
      order by rownum desc
The following code works:*
DECLARE                
l_metadata VARCHAR2(32767)
            := '<?xml version="1.0"?>
<DICOM_OBJECT xmlns="http://xmlns.oracle.com/ord/dicom/metadata_1_0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.oracle.com/ord/dicom/metadata_1_0 http://xmlns.oracle.com/ord/dicom/metadata_1_0">
  <LONG_STRING tag="00100020" definer="DICOM" name="Patient ID" offset="816" length="6">#00100020#</LONG_STRING>
  <SEQUENCE xmlns="http://xmlns.oracle.com/ord/dicom/metadata_1_0" tag="00082218" definer="DICOM" name="Anatomic Region Sequence" offset="694" length="76">
                    <ITEM>
                      <SHORT_STRING tag="00080100" definer="DICOM" name="Code Value" offset="722" length="8">T-AA000</SHORT_STRING>
                      <SHORT_STRING tag="00080102" definer="DICOM" name="Coding Scheme Designator" offset="738" length="4">SRT</SHORT_STRING>
                      <LONG_STRING tag="00080104" definer="DICOM" name="Code Meaning" offset="750" length="4">Eye</LONG_STRING>
                    </ITEM>
                  </SEQUENCE>
</DICOM_OBJECT>';
l_metadata_xml XMLTYPE;
BEGIN   
     l_metadata_xml := xmltype(l_metadata, 'http://xmlns.oracle.com/ord/dicom/metadata_1_0');
      SELECT UPDATEXML(l_metadata_xml
                      ,'/DICOM_OBJECT/*[@name="Patient ID"]/text()'
                      ,'dayodayodayo'
                      ,'xmlns="http://xmlns.oracle.com/ord/dicom/metadata_1_0"')
        INTO l_metadata_xml
        FROM DUAL;
   INSERT INTO test(id
                    ,xml)
       VALUES (7
              ,l_metadata_xml);       
END;    
This code doesn't work, and gives the error mentioned:*
DECLARE                
l_metadata VARCHAR2(32767)
            := '<?xml version="1.0"?>
<DICOM_OBJECT xmlns="http://xmlns.oracle.com/ord/dicom/metadata_1_0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.oracle.com/ord/dicom/metadata_1_0 http://xmlns.oracle.com/ord/dicom/metadata_1_0">
  <LONG_STRING tag="00100020" definer="DICOM" name="Patient ID" offset="816" length="6">#00100020#</LONG_STRING>
  <SEQUENCE xmlns="http://xmlns.oracle.com/ord/dicom/metadata_1_0" tag="00082218" definer="DICOM" name="Anatomic Region Sequence" offset="694" length="76">
                    <ITEM>
                      <SHORT_STRING tag="00080100" definer="DICOM" name="Code Value" offset="722" length="8">T-AA000</SHORT_STRING>
                      <SHORT_STRING tag="00080102" definer="DICOM" name="Coding Scheme Designator" offset="738" length="4">SRT</SHORT_STRING>
                      <LONG_STRING tag="00080104" definer="DICOM" name="Code Meaning" offset="750" length="4">Eye</LONG_STRING>
                    </ITEM>
                  </SEQUENCE>
</DICOM_OBJECT>';
l_metadata_xml XMLTYPE;
BEGIN   
   l_metadata_xml := xmltype(l_metadata, 'http://xmlns.oracle.com/ord/dicom/metadata_1_0');
   --This is the difference from the above code                       
   l_metadata_xml := test_replace_metadata(l_metadata_xml);                                   
   INSERT INTO test(id
                    ,xml)
       VALUES (7
              ,l_metadata_xml);       
END;            
This is the full text of the error message:*
"ORA-03113: end-of-file on communication channel
Process ID: 10847
Session ID: 321 Serial number: 33192"Looking into the trace files, I saw this information (This is from a different occurance, but it has remained the same):
Trace file (omitted)
Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
ORACLE_HOME = /opt/app/oracle/product/11.1.0/db_1/
System name:     Linux
Node name:     (omitted)
Release:     2.6.18-92.el5
Version:     #1 SMP Tue Apr 29 13:16:15 EDT 2008
Machine:     x86_64
Instance name: (omitted)
Redo thread mounted by this instance: 1
Oracle process number: 53
Unix process pid: 22883, image: (omitted)
*** 2009-06-24 13:47:31.198
*** SESSION ID:(omitted)
*** CLIENT ID:(omitted)
*** SERVICE NAME:(omitted)
*** MODULE NAME:(omitted)
*** ACTION NAME:(omitted)
Exception [type: SIGSEGV, Address not mapped to object] [ADDR:0x64] [PC:0x2250968, kolasaRead()+66]
DDE: Problem Key 'ORA 7445 [kolasaRead()+66]' was flood controlled (0x6) (incident: 70951)
ORA-07445: exception encountered: core dump [kolasaRead()+66] [SIGSEGV] [ADDR:0x64] [PC:0x2250968] [Address not mapped to object] []
ssexhd: crashing the process...
Shadow_Core_Dump = PARTIAL  Why is this happening? Also, When I remove the call to the function or if I remove the SEQUENCE element from the xml everything works fine.
Any ideas?
Edited by: rcdev on Jun 25, 2009 2:17 PM - Added code blocks for readability.
Edited by: rcdev on Jun 25, 2009 2:28 PM

Answer 1

In short, something inside Oracle is blowing up that shouldn't be, hence the ORA-7445. I did a search on MetaLink but it didn't turn up anything for your version and the internal function that is blowing up. Given you are on 11.1.0.7, I'm going to assume you have some service contract with Oracle and so can open a SR with them. That would be your best bet for getting it resolved given the internal Oracle error you are encountering.
The next best option would be to post this question on the {forum:id=34} forum given some of the people that watch that forum.