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Infinite Heap in Java
 

Submitted by: Octavia Anghel(octaviaanghel@gmail.com)

Wednesday Mar 28th 2018 by Octavia Anghel

Language: Java, Expertise: Intermediate - Learn more about how to avoid memory issues in Java.

This method creates a PDF file and returns the binary PDF data as a byte array. This particular line of code supposes that the resulting file is small and fits into the available heap memory, but if this code can not make this 100% sure, then it is vulnerable to an out of memory condition.

byte[] pdf = toPdf(file);

Moreover if it run server-side, that means in general many parallel threads. Bulk data should never by handled by byte arrays.

Streams should be used and the data should be spooled to disk or database.

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