IT37739: XMLNSC PARSER CAN TRIGGER NON-FATAL ABEND IF VALIDATION IS ENABLED AND A MALFORMED XML MESSAGE IS PARSED

APAR status

• Closed as program error.

Error description

• If a malformed XML message which has an incomplete closing tag,
  for example
  
  <Student>    <Name>James</Nam
  
  is parsed using the XMLNSC parser with validation enabled then
  an informational abend will be generated and the following BIP
  exceptions will be thrown:
  
  BIP5009E: XML Parsing Errors have occurred. : /Users/gb120268/l
  ocalbuilds/S1100/WMB/src/MTI/MTIforBroker/GenXmlParser4/ImbXMLN
  SCParser.cpp:1069: ImbXMLNSCParser::parseFirstChild: :
  BIP5020E: XMLNSC parser: XML parsing was stopped due to an
  internal error.  Internal error information: -1 : /Users/gb1202
  68/localbuilds/S1100/WMB/src/MTI/MTIforBroker/GenXmlParser4/Imb
  XMLNSCDocHandler.cpp:927: ImbXMLNSCDocHandler::handleAbort: ComI
  TestFlow#FCMComposite_1_1
  
  Additionally an abend file will be generated, but the
  DataFlowEngine or IntegrationServer process will not exit. The
  abend file will show
  
  Function: ImbXMLNSCServices::abort
  ---- Inserts ----
  XML Parser R1.1.28 Wed, 2 Dec 2020 09:45:05 GMT SymbolTable.c:
  2119 SymbolTable.needTest(22)
  ---- Stack ----
  #4 0x7fcfdb5390cd in
  ImbXMLNSCExceptionCache::parseAbortedByXLXP(char*) from
  /opt/ibm/ace-11/server/lib/libGenXmlParser4.so
  #5 0x7fcfdb539124 in ImbXMLNSCServices::abort(void const*,
  unsigned int) from
  /opt/ibm/ace-11/server/lib/libGenXmlParser4.so
  #6 0x7fcfd72ee3da in xlxpc::Services::panic(void const*,
  unsigned int, xlxpc::XLXPCParser&) from
  /opt/ibm/ace-11/server/xlxpc/lib/libBIPNVBRT.so.11
  #7 0x7fcfd7312afa in SymbolTable_scanQNameBuffered2 from
  /opt/ibm/ace-11/server/xlxpc/lib/libBIPNVBRT.so.11
  #8 0x7fcfd73232ae in VMScannerEventQueue_scanEndElement from
  /opt/ibm/ace-11/server/xlxpc/lib/libBIPNVBRT.so.11
  #9 0x7fcfd72fc24c in ?? from
  /opt/ibm/ace-11/server/xlxpc/lib/libBIPNVBRT.so.11
  #10 0x7fcfd72fc4cf in ?? from
  /opt/ibm/ace-11/server/xlxpc/lib/libBIPNVBRT.so.11
  #11 0x7fcfd72f4f7c in xlxpc::XLXPCParser::parseNext() from
  /opt/ibm/ace-11/server/xlxpc/lib/libBIPNVBRT.so.11
  

Local fix

• Disable validation
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  All users of the XMLNSC parser in IBM Integration Bus v10, App
  Connect Enterprise v11, or v12.
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  If a malformed XML message which has an incomplete closing tag,
  for example
  
  <Student>    <Name>James</Nam
  
  is parsed using the XMLNSC parser with validation enabled then
  an informational abend will be generated and the following BIP
  exceptions will be thrown:
  
  BIP5009E: XML Parsing Errors have occurred. :
  /Users/gb120268/localbuilds/S1100/WMB/src/MTI/MTIforBroker/GenXm
  lParser4/ImbXMLNSCParser.cpp:1069:
  ImbXMLNSCParser::parseFirstChild: :
  BIP5020E: XMLNSC parser: XML parsing was stopped due to an
  internal error.  Internal error information: -1 :
  /Users/gb120268/localbuilds/S1100/WMB/src/MTI/MTIforBroker/GenXm
  lParser4/ImbXMLNSCDocHandler.cpp:927:
  ImbXMLNSCDocHandler::handleAbort: ComITestFlow#FCMComposite_1_1
  
  Additionally an abend file will be generated, but the
  DataFlowEngine or IntegrationServer process will not exit. The
  abend file will show
  
  Function: ImbXMLNSCServices::abort
  ---- Inserts ----
  XML Parser R1.1.28 Wed, 2 Dec 2020 09:45:05 GMT SymbolTable.c:
  2119 SymbolTable.needTest(22)
  ---- Stack ----
  #4 0x7fcfdb5390cd in
  ImbXMLNSCExceptionCache::parseAbortedByXLXP(char*) from
  /opt/ibm/ace-11/server/lib/libGenXmlParser4.so
  #5 0x7fcfdb539124 in ImbXMLNSCServices::abort(void const*,
  unsigned int) from
  /opt/ibm/ace-11/server/lib/libGenXmlParser4.so
  #6 0x7fcfd72ee3da in xlxpc::Services::panic(void const*,
  unsigned int, xlxpc::XLXPCParser&) from
  /opt/ibm/ace-11/server/xlxpc/lib/libBIPNVBRT.so.11
  #7 0x7fcfd7312afa in SymbolTable_scanQNameBuffered2 from
  /opt/ibm/ace-11/server/xlxpc/lib/libBIPNVBRT.so.11
  #8 0x7fcfd73232ae in VMScannerEventQueue_scanEndElement from
  /opt/ibm/ace-11/server/xlxpc/lib/libBIPNVBRT.so.11
  #9 0x7fcfd72fc24c in ?? from
  /opt/ibm/ace-11/server/xlxpc/lib/libBIPNVBRT.so.11
  #10 0x7fcfd72fc4cf in ?? from
  /opt/ibm/ace-11/server/xlxpc/lib/libBIPNVBRT.so.11
  #11 0x7fcfd72f4f7c in xlxpc::XLXPCParser::parseNext() from
  /opt/ibm/ace-11/server/xlxpc/lib/libBIPNVBRT.so.11
  

Problem conclusion

• Invalid messages of this type no longer trigger a non-fatal
  abend and will correctly trigger appropriate parsing exceptions.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v11.0      11.0.0.20
  v12.0      12.0.7.0
  
  The latest available maintenance can be obtained from:
  http://www-01.ibm.com/support/docview.wss?rs=849&uid=swg27006041
  
  If the maintenance level is not yet available,information on
  its planned availability can be found on:
  http://www-1.ibm.com/support/docview.wss?rs=849&uid=swg27006308
  ---------------------------------------------------------------
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  INTEGRATION BUS

• Fixed component ID

  5724J0540

Applicable component levels