Getting HEAP SPACE-OUT OF MEMORY when processing large files

#26821

when processing html files of large size 7 – 11MB ,OutOfMemoryError: Java heap space error is occurring

java.lang.OutOfMemoryError: Java heap space
at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:99)
at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:393)
at java.lang.StringBuffer.append(StringBuffer.java:225)
at org.zefer.pd4ml.pdf.f.do(Unknown Source)
at org.zefer.pd4ml.pdf.f.ÓO0000(Unknown Source)
at org.zefer.pd4ml.pdf.PD4Device.startNewPage(Unknown Source)
at org.zefer.pd4ml.PD4ML.o00000(Unknown Source)
at org.zefer.pd4ml.PD4ML.render(Unknown Source)
at org.zefer.pd4ml.PD4ML.render(Unknown Source)

some times:

java.lang.OutOfMemoryError: Java heap space
at org.zefer.html.c.g.super(Unknown Source)
at org.zefer.html.c.b.privatesuper(Unknown Source)
at org.zefer.html.c.b.Ôo0000(Unknown Source)
at org.zefer.html.c.f.Ô00000(Unknown Source)
at org.zefer.html.c.f.Ó00000(Unknown Source)
at org.zefer.html.c.f.ø00000(Unknown Source)
at org.zefer.html.c.f.Õ00000(Unknown Source)
at org.zefer.html.c.f.return(Unknown Source)
at org.zefer.html.c.f.oo0000(Unknown Source)
at org.zefer.html.c.f.õO0000(Unknown Source)
at org.zefer.html.doc.PD4MLHtmlParser.parse(Unknown Source)
at org.zefer.html.doc.PD4MLHtmlParser.buildDocument(Unknown Source)
at org.zefer.pd4ml.PD4ML.o00000(Unknown Source)
at org.zefer.pd4ml.PD4ML.render(Unknown Source)
at org.zefer.pd4ml.PD4ML.render(Unknown Source)

#29241

Did you override the default max heap size with -Xmx???m JVM command line parameter? The default value as a rule is not sufficient for HTML rendering.

#29242

yes, it is set to 256m

#29243

HTML rendering (especially of that big docs) is a resource consuming task. We recommend to set at least 512m, but 1gig is better.

It does not mean JVM immediately allocates the memory – it only defines a limit for peak cases.

#29244

Hi Team,

Are you planning to use some stream or writer so it can handle big pdf. 17 MB html file should not be big. Ideally framework should allow 1 GB html file to pdf.

Thanks
Ram

#29245

I am afraid, a streamed or serialized HTML-to-PDF conversion is not possible – a document must be rendered in memory completely before it is converted to PDF. There is always a possibility that at the end of a document there is an HTML tag or a content portion, which would require a complete document re-layouting.

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