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https://issues.apache.org/jira/browse/PDFBOX-1920?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13920743#comment-13920743
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James Carter commented on PDFBOX-1920:
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Hi Timo, I'm the developer of the 3rd party solution that is using PDFBox in
this case. If I understand the thread correctly, 3rd party PDF applications
are creating invalid PDFs that PDFBox attempts to 'repair'. I've tried
increasing the pushBackSize property, but encountering a different exception
during the merge (I've included the code excerpt + exception below). Is this
something that PDFBox could handle/repair, or do we need to handle this
elsewhere? (E.g validate the PDFs users are uploading and tell them if it's
invalid)
System.setProperty("org.apache.pdfbox.baseParser.pushBackSize", "999000");
PDFMergerUtility mergePdf = new PDFMergerUtility();
FileOutputStream fos = new FileOutputStream("test.pdf");
mergePdf.addSource("docs/01. Heads of Terms (Signed).pdf");
mergePdf.setDestinationStream(fos);
mergePdf.mergeDocuments();
Exception in thread "main" java.io.IOException: expected='endstream' actual=''
org.apache.pdfbox.io.PushBackInputStream@45cb0cdc
at
org.apache.pdfbox.pdfparser.BaseParser.parseCOSStream(BaseParser.java:609)
at org.apache.pdfbox.pdfparser.PDFParser.parseObject(PDFParser.java:605)
at org.apache.pdfbox.pdfparser.PDFParser.parse(PDFParser.java:194)
at org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:1219)
at org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:1186)
at
org.apache.pdfbox.util.PDFMergerUtility.mergeDocuments(PDFMergerUtility.java:196)
at com.acme.MergePDF.runSmartService(MergePDF.java:52)
at com.acme.MergePDF.main(MergePDF.java:68)
> Buffer Error when trying to run node
> ------------------------------------
>
> Key: PDFBOX-1920
> URL: https://issues.apache.org/jira/browse/PDFBOX-1920
> Project: PDFBox
> Issue Type: Bug
> Components: Utilities
> Reporter: Chris Hewkin
> Assignee: Timo Boehme
> Attachments: Application.zip
>
>
> Description: Trying to merge PDF using the latest Merge PDF Node but getting
> the following error
> There is a problem with task “Merge PDF” in the process “Create Application
> Pack”
> Problem: An error occurred in executing an Activity Class.
> Details: org.apache.pdfbox.exceptions.WrappedIOException: Could not push back
> 628696 bytes in order to reparse stream. Try increasing push back buffer
> using system property org.apache.pdfbox.baseParser.pushBackSize
> Recommended Action: Examine the activity class to correct the error and then
> resume.
> Priority of this problem: High Priority
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