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https://issues.apache.org/jira/browse/PDFBOX-4559?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17421531#comment-17421531
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Samved Chandrakant Divekar commented on PDFBOX-4559:
----------------------------------------------------
[~tilman] Thank you. Do you mean open multiple PDDocument objects for the same
PDF and read pages? And also, will this be fixed as part of any future
releases? (e.g. PDFBox 3.0)
> Parse error reading document from several threads
> -------------------------------------------------
>
> Key: PDFBOX-4559
> URL: https://issues.apache.org/jira/browse/PDFBOX-4559
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 2.0.15
> Environment: Oracle Java 8 update125 on both Mac OS X and centos
> Reporter: Jack
> Priority: Major
> Labels: concurrency, multithreading, type1, type1font
> Attachments: test.pdf
>
>
> I got following error while running a simple parallel rendering code.
> However, the error doesn't happen when I change parallelStream to sequential
> (stream()). Interestingly, both methods will render exact same images. I saw
> a possible related ticket PDFBOX-3654. But seems that issue was fixed. I'd
> like to learn if we have some more bugs related?
> *Sample code*:
> {code:java}
> PDDocument document = PDDocument.load(new File(pdfFilename));
> List<PDDocument> pdfPages = new Splitter().split(document);
> pdfPages.parallelStream().forEach(page -> {
> try {
> PDFRenderer renderer = new PDFRenderer(page);
> renderer.renderImageWithDPI(0, 180, ImageType.RGB); // change dpi to your
> number
> } catch (IOException e) {
> System.out.println(e);
> }
> try {
> pdfPage.close();
> } catch (IOException ignored) {
> }
> });
> try {
> document.close();
> } catch (IOException ignored) {
> }
> {code}
>
> *Error log*:
> {noformat}
> ERROR [PDType1Font] Can't read the embedded Type1 font POAEND+Gotham-Book
> java.io.IOException: unexpected closing parenthesis
> at org.apache.fontbox.type1.Type1Lexer.readToken(Type1Lexer.java:123)
> ~[pdfbox-2.0.15-snapshot108.jar:2.0.15-SNAPSHOT]
> at org.apache.fontbox.type1.Type1Lexer.nextToken(Type1Lexer.java:75)
> ~[pdfbox-2.0.15-snapshot108.jar:2.0.15-SNAPSHOT]
> at org.apache.fontbox.type1.Type1Parser.readValue(Type1Parser.java:398)
> ~[pdfbox-2.0.15-snapshot108.jar:2.0.15-SNAPSHOT]
> at org.apache.fontbox.type1.Type1Parser.readOtherSubrs(Type1Parser.java:707)
> ~[pdfbox-2.0.15-snapshot108.jar:2.0.15-SNAPSHOT]
> at org.apache.fontbox.type1.Type1Parser.parseBinary(Type1Parser.java:550)
> ~[pdfbox-2.0.15-snapshot108.jar:2.0.15-SNAPSHOT]
> at org.apache.fontbox.type1.Type1Parser.parse(Type1Parser.java:64)
> ~[pdfbox-2.0.15-snapshot108.jar:2.0.15-SNAPSHOT]
> at org.apache.fontbox.type1.Type1Font.createWithSegments(Type1Font.java:85)
> ~[pdfbox-2.0.15-snapshot108.jar:2.0.15-SNAPSHOT]
> at org.apache.pdfbox.pdmodel.font.PDType1Font.<init>(PDType1Font.java:262)
> ~[pdfbox-2.0.15-snapshot108.jar:2.0.15-SNAPSHOT]
> at
> org.apache.pdfbox.pdmodel.font.PDFontFactory.createFont(PDFontFactory.java:62)
> ~[pdfbox-2.0.15-snapshot108.jar:2.0.15-SNAPSHOT]
> at org.apache.pdfbox.pdmodel.PDResources.getFont(PDResources.java:146)
> ~[pdfbox-2.0.15-snapshot108.jar:2.0.15-SNAPSHOT]
> at
> org.apache.pdfbox.contentstream.operator.text.SetFontAndSize.process(SetFontAndSize.java:60)
> ~[pdfbox-2.0.15-snapshot108.jar:2.0.15-SNAPSHOT]
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:869)
> ~[pdfbox-2.0.15-snapshot108.jar:2.0.15-SNAPSHOT]
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:505)
> ~[pdfbox-2.0.15-snapshot108.jar:2.0.15-SNAPSHOT]
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:479)
> ~[pdfbox-2.0.15-snapshot108.jar:2.0.15-SNAPSHOT]
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processPage(PDFStreamEngine.java:152)
> ~[pdfbox-2.0.15-snapshot108.jar:2.0.15-SNAPSHOT]
> at org.apache.pdfbox.rendering.PageDrawer.drawPage(PageDrawer.java:265)
> ~[pdfbox-2.0.15-snapshot108.jar:2.0.15-SNAPSHOT]
> at org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:314)
> ~[pdfbox-2.0.15-snapshot108.jar:2.0.15-SNAPSHOT]
> at org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:243)
> ~[pdfbox-2.0.15-snapshot108.jar:2.0.15-SNAPSHOT]
> at
> org.apache.pdfbox.rendering.PDFRenderer.renderImageWithDPI(PDFRenderer.java:229)
> ~[pdfbox-2.0.15-snapshot108.jar:2.0.15-SNAPSHOT]
> WARN [PDType1Font] Using fallback font Helvetica for POAEND+Gotham-Book
> {noformat}
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