Erratic NullPointerException in PD4ML.render()

#26738

We’re using PD4ML 3.70fx4 in a servlet running in a Tomcat container and PD4ML.render(URL, ByteArrayOutputStream) causes an erratic NullPointerException with the following stacktrace:

java.lang.NullPointerException
at org.zefer.pd4ml.PD4ML.o00000(Unknown Source)
at org.zefer.pd4ml.PD4ML.render(Unknown Source)
at PDFGeneratorServlet.doPdfGeneration(PDFGeneratorServlet.java:142)
…

Sadly, the stacktrace does not provide enough information to locate the root cause.

This behaviour is erratic. As a matter of fact, the same request does usually succeed upon retry just a second later. But responding with a 404 is still not feasible from the customers’ perspective.

Any suggestions appreciated!

#29026

Did you check if the problem exists in the most recent version of PD4ML?

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