Yes, that is what I mean, my text was unclear. One PDDocument may be
accessed only by one thread.
Tilman
Am 01.08.2014 21:16, schrieb Brzrk One:
In my experience, parsing the PDF fails badly when the
PDDocument is accessed by more than one thread.
Usually in the decompression and decryption, but not exclusively.
Certainly the thread model is different btwn a standalone app and a servlet.
On Fri, Aug 1, 2014 at 3:07 PM, Tilman Hausherr <[email protected]>
wrote:
I once got similar exceptions when trying to access the same PDF from
several threads. See also
https://pdfbox.apache.org/userguide/faq.html#threadsafe
Tilman
Am 01.08.2014 19:20, schrieb Jonathan Carr:
Hello all
I've written code to take an existing PDF containing a form, populate
values in some of the fields, and then output the results as a new PDF. As
a standalone test class this works great, however as soon as put the code
into a servlet (I wish to serve the resulting PDF to users as a download)
I
get an error. The PDFBox-related code and PDF document being used are
exactly the same in both cases.
Clearly there's a difference between the servlet and non-servlet
environments, but so far I've failed to find it. Does anyone have any
suggestions as to where I should be looking?
I'm running OpenJDK 7 and pdfbox-1.8.6, with Jetty as my servlet
container.
Example code:
InputStream in = MyServlet.class.getResourceAsStream("Form.pdf");
PDDocument doc = PDDocument.load(in);
PDDocumentCatalog cat = doc.getDocumentCatalog();
PDAcroForm acroForm = cat.getAcroForm();
PDField field = acroForm.getField("myField");
field.setValue("someValue");
The following error is thrown when setValue() is called:
java.io.IOException: null
at org.apache.pdfbox.filter.FlateFilter.decode(FlateFilter.java:110)
~[pdfbox-app-1.8.6.jar:na]
at org.apache.pdfbox.cos.COSStream.doDecode(COSStream.java:342)
~[pdfbox-app-1.8.6.jar:na]
at org.apache.pdfbox.cos.COSStream.doDecode(COSStream.java:254)
~[pdfbox-app-1.8.6.jar:na]
at org.apache.pdfbox.cos.COSStream.getUnfilteredStream(
COSStream.java:188)
~[pdfbox-app-1.8.6.jar:na]
at
org.apache.pdfbox.pdfparser.PDFStreamParser.<init>(
PDFStreamParser.java:122)
~[pdfbox-app-1.8.6.jar:na]
at
org.apache.pdfbox.pdmodel.interactive.form.PDAppearance.
getStreamTokens(PDAppearance.java:186)
~[pdfbox-app-1.8.6.jar:na]
at
org.apache.pdfbox.pdmodel.interactive.form.PDAppearance.
getStreamTokens(PDAppearance.java:159)
~[pdfbox-app-1.8.6.jar:na]
at
org.apache.pdfbox.pdmodel.interactive.form.PDAppearance.
setAppearanceValue(PDAppearance.java:266)
~[pdfbox-app-1.8.6.jar:na]
at
org.apache.pdfbox.pdmodel.interactive.form.PDVariableText.setValue(
PDVariableText.java:131)
~[pdfbox-app-1.8.6.jar:na]
...
Caused by:
java.util.zip.DataFormatException: incorrect header check
at java.util.zip.Inflater.inflateBytes(Native Method) ~[na:1.7.0_55]
at java.util.zip.Inflater.inflate(Inflater.java:259) ~[na:1.7.0_55]
at java.util.zip.Inflater.inflate(Inflater.java:280) ~[na:1.7.0_55]
at org.apache.pdfbox.filter.FlateFilter.decompress(FlateFilter.java:129)
~[pdfbox-app-1.8.6.jar:na]
at org.apache.pdfbox.filter.FlateFilter.decode(FlateFilter.java:102)
~[pdfbox-app-1.8.6.jar:na]
...
Many thanks
-Jonathan
