[XALANJ-2627] Adding multiple transform using addTransform consumes huge memory and cause OOM

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Security Level: No security risk; visible to anyone (Ordinary problems in Xalan projects. Anybody can view the issue.)
• Assignee: Gary D. Gregory
• Reporter: Subhajit
• Created: 18/May/20 15:18
• Updated: 13/May/23 21:09

Description

We are using XALAN for XSLT transformation. We have around 10 transformer. Our pattern is

 

Transformation.builder(transformationFactory)
.setUseInterpreter(true)
.setLogger(log)
.setSource(some source))
.setResult(some target)
.addTransform(Handler1())
.addTransform(Handler2())
.addTransform(Handler3())
.addTransform(Handler4())
.addTransform(Handler5())
.addTransform(Handler6())
.addTransform(Handler7())
.addTransform(Handler8())
.addTransform(Handler9())
.addTransform(Handler10())
.addTransform(Handler11())
.addTransform(Handler12())
.build()
.transform();

 

This pattern seems to take lots of memory. But if  we do them individually 12 times (by using output of 1 as input of another), memory usage get reduced.

 

Transformation.builder(transformationFactory)
.setUseInterpreter(true)
.setLogger(log)
.setSource(some source))
.setResult(some target)
.addTransform(Handler1())

.build()
.transform();

 

It seems Xalan is holding unnecessary memory for the 1st type of pattern