RS03080: HTDS: OUTPUT PARAMETERS CANNOT BE SERIALIZED

Operational Decision Manager V8.9.2.1 Fix Pack
Operational Decision Manager V8.9.0.2: Interim Fix 16
IBM Operational Decision Manager V8.10.1 Download Document
Operational Decision Manager for z/OS 8.10.1 Mod Pack
Operational Decision Manager V8.10.1 Mod Pack
Operational Decision Manager V8.9.2.2 Fix Pack
Operational Decision Manager for z/OS 8.9.2.2 Fix Pack
Operational Decision Manager V8.9.1.0: Interim Fix 30
Operational Decision Manager V8.9.0.2: Interim Fix 15

APAR status

• Closed as program error.

Error description

• At some point due to memory issue (low or GC activity), the
  output parameters cannot be serialized with the following  log :
  The XOM class com.xxx.yyy.Root cannot be deserialized. Verify
  that the XOM library is set correctly.
  java.lang.NullPointerException
      at
  com.ibm.rules.res.xml.internal.XSDUtil.deserializeJavaType(XSDUt
  il.java:196)
      at
  com.ibm.rules.htds.binding.xml.XMLEventObjectReader.getResult(XM
  LEventObjectReader.java:273)
      at
  com.ibm.rules.htds.binding.xml.RESTContentHandler.endElement(RES
  TContentHandler.java:609)
      at
  com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.end
  Element(AbstractSAXParser.java:609)
      at
  com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScann
  erImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1783)
      at
  com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScann
  erImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl
  .java:2970)
      at
  com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.n
  ext(XMLDocumentScannerImpl.java:606)
      at
  com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl
  .next(XMLNSDocumentScannerImpl.java:118)
      at
  com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScann
  erImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510)
      at
  com.sun.org.apache.xerces.internal.parsers.XML11Configuration.pa
  rse(XML11Configuration.java:848)
      at
  com.sun.org.apache.xerces.internal.parsers.XML11Configuration.pa
  rse(XML11Configuration.java:777)
      at
  com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLPa
  rser.java:141)
      at
  com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.par
  se(AbstractSAXParser.java:1213)
      at
  com.ibm.rules.htds.binding.xml.SignatureXMLBinding.deserialize(S
  ignatureXMLBinding.java:170)
      at
  com.ibm.rules.htds.util.DecisionServiceUtil.extractInParameters(
  DecisionServiceUtil.java:266)
      at
  com.ibm.rules.htds.handlers.RESTExecutionRequestHandler.execute(
  RESTExecutionRequestHandler.java:255)
      at
  com.ibm.rules.htds.handlers.RESTExecutionRequestHandler.handleRe
  quest(RESTExecutionRequestHandler.java:179)
      at
  com.ibm.rules.htds.servlet.RESTDecisionServiceServlet.doPost(RES
  TDecisionServiceServlet.java:124)
  

Local fix

• Restarting server and re-submitting same input would work.
  

Problem summary

• Because of low memory of the JVM running HTDS,
  The JAXBContext that we store in a cache behind a WeakReference
  gets collected by garbage collector. This causes NPE issues,
  even if memory is raised up
  

Problem conclusion

• The code was fixed.
  

Temporary fix

• Restarting server and re-submitting same input would work.
  

Comments

APAR Information

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

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

Modules/Macros

• 999
  

Fix information

• Fixed component name

  WS DECISION CTR

• Fixed component ID

  5725B6900

Applicable component levels

• R891 PSY

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