IT27095: RESTRICT XLXP SYMBOL TABLE FROM GROWING IN ORDER TO STOP ABENDS FROM HAPPENING

APAR status

• Closed as program error.

Error description

• If the symbol table grows beyond a certain size, e.g.
  256Kb then it can trigger abends that include the following
  XLXP function call :
  
  SymbolTable_scanQNameBuffered2 from
  /opt/ibm/mqsi/iib-10.0.0.11/server/xlxpc/lib/libBIPNVBRT.so.11
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  <span style="background-color:rgb(255, 255, 255)">All users of
  IBM Integration Bus V10.0 and IBM App Connect Enterprise V11.0
  using  XMLNSC, SOAP or DataObject domain. </span>
  
  
  Platforms affected:
  z/OS, MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  <span style="background-color:rgb(255, 255, 255)">XMLNSC parser
  crashes occasionally with the following call </span>
  <span style="background-color:rgb(255, 255, 255)">
  
  </span>
  <span style="background-color:rgb(255, 255,
  255)">SymbolTable_scanQNameBuffered2 from </span><span
  style="background-color:rgb(255, 255,
  255)">/opt/ibm/mqsi/iib-10.0.0.11/server/xlxpc/l</span>
  
  The reason being a growth in the internal symbol table used by
  the parser.
  The issue may appear in SOAP, DataObject parsers as they
  internally make use of XMLNSC parser.
  

Problem conclusion

• A new property named 'symbolTableThresholdInKB' is introduced
  for XMLNSC parser which can be used to set an upper limit on its
  internal symbol table size.  It can be set as below
  
  mqsichangeproperties node_name -e server_name -o
  ComIbmGenericXmlParserFactory -n symbolTableThresholdInKB -v
  <value in kb. for eg: 1>
  
  For stand-alone integration servers, the property can be set in
  the server.conf.yaml under the XMLNSC section.
  
  With this property being set, the XMLNSC parser will release all
  its cached objects once its symbol table size reaches the
  threshold value. You can see the following message in activity
  log when this happens
  
  <span style="background-color:rgb(255, 255, 255)">BIP11311W :
  The parser of type 'XMLNSC' has been reset due to the
  symbolTableThresholdInKB threshold being reached. </span>
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v10.0      10.0.0.17
  v11.0      11.0.0.9
  
  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