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https://issues.apache.org/jira/browse/PDFBOX-5541?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17629676#comment-17629676
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liu edited comment on PDFBOX-5541 at 11/7/22 11:13 AM:
-------------------------------------------------------

hi!Is it my way of using it wrong, what should I do?


was (Author: JIRAUSER297279):
Is it my way of using it wrong, what should I do?

> Does pdfbox support multithreading to convert different pages of the same 
> document at the same time?
> ----------------------------------------------------------------------------------------------------
>
>                 Key: PDFBOX-5541
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-5541
>             Project: PDFBox
>          Issue Type: Bug
>            Reporter: liu
>            Priority: Blocker
>         Attachments: image-2022-11-07-16-38-15-290.png
>
>
>  !image-2022-11-07-16-38-15-290.png! 
> org.apache.pdfbox.pdmodel.font.PDCIDFontType2 <init>
> 警告: Could not read embedded OTF for font QCXXKD+SimSun
> java.io.IOException: Unexpectedly no bytes available for read in buffer.
>       at 
> org.apache.pdfbox.io.ScratchFileBuffer.read(ScratchFileBuffer.java:459)
>       at 
> org.apache.pdfbox.io.RandomAccessInputStream.read(RandomAccessInputStream.java:98)
>       at java.io.InputStream.read(InputStream.java:101)
>       at org.apache.pdfbox.filter.FlateFilter.decompress(FlateFilter.java:112)
>       at org.apache.pdfbox.filter.FlateFilter.decode(FlateFilter.java:50)
>       at org.apache.pdfbox.filter.Filter.decode(Filter.java:87)
>       at org.apache.pdfbox.cos.COSInputStream.create(COSInputStream.java:87)
>       at org.apache.pdfbox.cos.COSStream.createInputStream(COSStream.java:175)
>       at org.apache.pdfbox.cos.COSStream.createInputStream(COSStream.java:163)
>       at 
> org.apache.pdfbox.pdmodel.common.PDStream.createInputStream(PDStream.java:238)
>       at 
> org.apache.pdfbox.pdmodel.font.PDCIDFontType2.<init>(PDCIDFontType2.java:112)
>       at 
> org.apache.pdfbox.pdmodel.font.PDCIDFontType2.<init>(PDCIDFontType2.java:65)
>       at 
> org.apache.pdfbox.pdmodel.font.PDFontFactory.createDescendantFont(PDFontFactory.java:139)
>       at 
> org.apache.pdfbox.pdmodel.font.PDType0Font.<init>(PDType0Font.java:203)
>       at 
> org.apache.pdfbox.pdmodel.font.PDFontFactory.createFont(PDFontFactory.java:97)
>       at org.apache.pdfbox.pdmodel.PDResources.getFont(PDResources.java:146)
>       at 
> org.apache.pdfbox.contentstream.operator.text.SetFontAndSize.process(SetFontAndSize.java:66)
>       at 
> org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:966)
>       at 
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:541)
>       at 
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:516)
>       at 
> org.apache.pdfbox.contentstream.PDFStreamEngine.processPage(PDFStreamEngine.java:155)
>       at org.apache.pdfbox.rendering.PageDrawer.drawPage(PageDrawer.java:284)
>       at 
> org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:355)
>       at 
> org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:272)
>       at org.apache.pdfbox.Test$2.run(Test.java:175)
>       at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
>       at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
>       at java.lang.Thread.run(Thread.java:748)
> org.apache.pdfbox.pdmodel.font.PDCIDFontType2 <init>
> 警告: Could not read embedded OTF for font QCXXKD+SimSun
> java.io.IOException: 'head' table is mandatory
>       at org.apache.fontbox.ttf.TTFParser.parseTables(TTFParser.java:198)
>       at org.apache.fontbox.ttf.TTFParser.parse(TTFParser.java:165)
>       at org.apache.fontbox.ttf.OTFParser.parse(OTFParser.java:79)
>       at org.apache.fontbox.ttf.OTFParser.parse(OTFParser.java:27)
>       at org.apache.fontbox.ttf.TTFParser.parse(TTFParser.java:110)
>       at org.apache.fontbox.ttf.OTFParser.parse(OTFParser.java:73)
>       at 
> org.apache.pdfbox.pdmodel.font.PDCIDFontType2.<init>(PDCIDFontType2.java:112)
>       at 
> org.apache.pdfbox.pdmodel.font.PDCIDFontType2.<init>(PDCIDFontType2.java:65)
>       at 
> org.apache.pdfbox.pdmodel.font.PDFontFactory.createDescendantFont(PDFontFactory.java:139)
>       at 
> org.apache.pdfbox.pdmodel.font.PDType0Font.<init>(PDType0Font.java:203)
>       at 
> org.apache.pdfbox.pdmodel.font.PDFontFactory.createFont(PDFontFactory.java:97)
>       at org.apache.pdfbox.pdmodel.PDResources.getFont(PDResources.java:146)
>       at 
> org.apache.pdfbox.contentstream.operator.text.SetFontAndSize.process(SetFontAndSize.java:66)
>       at 
> org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:966)
>       at 
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:541)
>       at 
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:516)
>       at 
> org.apache.pdfbox.contentstream.PDFStreamEngine.processPage(PDFStreamEngine.java:155)
>       at org.apache.pdfbox.rendering.PageDrawer.drawPage(PageDrawer.java:284)
>       at 
> org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:355)
>       at 
> org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:272)
>       at org.apache.pdfbox.Test$2.run(Test.java:175)
>       at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
>       at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
>       at java.lang.Thread.run(Thread.java:748)



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