XML Report Publisher Fails With java.lang.OutOfMemoryError

-- Notes:315477.1 XML publisher version 5.6.1
1. Under FO Processing:(XML Publisher Administrator -> data define 或 template 處)
1.1 "Use XML Publisher's XSLT processor" set to true
1.2 "Enable scalable feature of XSLT processor" set to true
1.3 Restart "Output Post Processor" concurrent process.
2. If got another error like 'post process(response) time out' then
2.1 Increase "Output Post Processor" concurrent process number.
2.2 Enlarge the profile "Concurrent:OPP Response Timeout" , "Concurrent:OPP Process Timeout" values.