Tuesday, 8 March 2016

java.lang.OutOfMemoryError: Java heap space error in Output PostProcessor

Possible causes for Java Heap Space error in OPP

1. There is limited heap space in the JVM to process the report
2. The Java application running is out of memory
3. The scalable feature isn't enabled
4. An older version of the JRE is being used in the configuration, 
5. There is insufficient space in the designated temp directory for processing the report, and reports are embedded with images which require a lot of space that unavailable.

The log will contain a java stack error similar to the following:
Caused by: java.lang.OutOfMemoryError: Java heap space
at oracle.xdo.parser.v2.XMLDocument.createNodeFromType(XMLDocument.java:2869)
at oracle.xdo.parser.v2.XMLDocument.createNodeFromType(XMLDocument.java:3000)
at oracle.xdo.parser.v2.XMLDocument.createTextNode(XMLDocument.java:735)
at oracle.xdo.parser.v2.DocumentBuilder.characters(DocumentBuilder.java:553)
at oracle.xdo.parser.v2.NonValidatingParser.reportCharacters(NonValidatingParser.java:1680)
at oracle.xdo.parser.v2.NonValidatingParser.parseText(NonValidatingParser.java:1391)
at oracle.xdo.parser.v2.NonValidatingParser.parseElement(NonValidatingParser.java:1268)

How to resolve Java Heap Space error in Output Post Processor?

Solution 1

1. Determine what the heap size per OPP process is currently:

2. The default should be:

3. Increase the Heap Space per Process to 1024:

4. Bring the managers down.
5. Please run the Concurrent Manager Recovery feature to address any Concurrent Manager / Concurrent Processing issues within the Oracle Application Manager.  NOTE: Regular use of the CP Analyzer in Note 1411723.1 can provide an Immediate Analysis and Output of a Concurrent Environment.
6. Bring the managers up again.


Solution 2
1. Log into applications with the System Administrator responsibility.
2. Navigate to Concurrent -> Program -> Define
3. Query the XML Publisher Template Re-Generator program
4. Set the following value for the Executable Options : -Xmx1024m
5. Save changes.
6. Retest the program.


Solution 3

Configure the XML Publisher Administrator Configuration settings.
1. As XML Publisher Administrator navigate to Administration->Configuration.
2. Under Temporary Directory pick a temporary file location on your concurrent processing node. This should be at least 5GB or 20x larger than largest XML data file you generate
3.  Under FO Processing, set:
o Use XML Publisher's XSLT processor set to True
o Enable scalable feature of XSLT processor set to False
o Enable XSLT runtime optimization set to True 


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