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Posted to dev@pdfbox.apache.org by "Sascha Szott (JIRA)" <ji...@apache.org> on 2013/04/29 13:44:16 UTC
[jira] [Commented] (PDFBOX-1585)
org.apache.pdfbox.util.PDFTextStripper.getText() causes thread to block
indefinitely
[ https://issues.apache.org/jira/browse/PDFBOX-1585?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13644437#comment-13644437 ]
Sascha Szott commented on PDFBOX-1585:
--------------------------------------
One way to bypass this issue would be to define a reasonable timeout for the extraction call (in my case I got proper results with a value for EXTRACTION_TIMEOUT of 300 seconds) :
{code}
TimeLimiter limiter = new SimpleTimeLimiter();
return limiter.callWithTimeout(new Callable<String>() {
public String call() {
return new PDFTextStripper().getText(PDDocument.load("/home/sascha/testfile.pdf", true));
}
}, EXTRACTION_TIMEOUT, TimeUnit.SECONDS, false);
{code}
> org.apache.pdfbox.util.PDFTextStripper.getText() causes thread to block indefinitely
> ------------------------------------------------------------------------------------
>
> Key: PDFBOX-1585
> URL: https://issues.apache.org/jira/browse/PDFBOX-1585
> Project: PDFBox
> Issue Type: Bug
> Components: PDFReader, Text extraction
> Affects Versions: 1.8.1
> Environment: Ubuntu Linux 10.04
> Solaris 10
> Java 1.6.0_34
> Reporter: Sascha Szott
>
> URL of the problematic pdf file is http://www.redalyc.org/pdf/540/54017220.pdf
> My program tries to extract the fulltext of the given pdf file in the following manner:
> {code}
> String fileName = "/home/sascha/testfile.pdf" // 1
> PDDocument pdDoc = PDDocument.load(fileName, true); // 2
> PDFTextStripper text = new PDFTextStripper(); // 3
> String fullText = text.getText(pdDoc); // 4
> {code}
> The call in line 4 causes the thread to block indefinitely (runs now for more than two days without making any progress). The file is stored in a local file system (no network interaction occurs).
> jstack indicates that the thread is not deadlocked:
> {code}
> "main" prio=10 tid=0x000000004187d800 nid=0x6ed8 runnable [0x00007f9e28e56000]
> java.lang.Thread.State: RUNNABLE
> at java.io.BufferedInputStream.fill(BufferedInputStream.java:218)
> at java.io.BufferedInputStream.read(BufferedInputStream.java:237)
> - locked <0x00000007d73a84a0> (a java.io.BufferedInputStream)
> at java.io.FilterInputStream.read(FilterInputStream.java:66)
> at java.io.PushbackInputStream.read(PushbackInputStream.java:122)
> at org.apache.pdfbox.io.PushBackInputStream.read(PushBackInputStream.java:91)
> at org.apache.pdfbox.pdfparser.BaseParser.parseCOSHexString(BaseParser.java:1006)
> at org.apache.pdfbox.pdfparser.BaseParser.parseCOSString(BaseParser.java:808)
> at org.apache.pdfbox.pdfparser.PDFStreamParser.parseNextToken(PDFStreamParser.java:260)
> at org.apache.pdfbox.pdfparser.PDFStreamParser.access$000(PDFStreamParser.java:46)
> at org.apache.pdfbox.pdfparser.PDFStreamParser$1.tryNext(PDFStreamParser.java:182)
> at org.apache.pdfbox.pdfparser.PDFStreamParser$1.hasNext(PDFStreamParser.java:194)
> at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:255)
> at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:235)
> at org.apache.pdfbox.util.operator.Invoke.process(Invoke.java:67)
> at org.apache.pdfbox.util.PDFStreamEngine.processOperator(PDFStreamEngine.java:554)
> at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:268)
> at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:235)
> at org.apache.pdfbox.util.operator.Invoke.process(Invoke.java:67)
> at org.apache.pdfbox.util.PDFStreamEngine.processOperator(PDFStreamEngine.java:554)
> at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:268)
> at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:235)
> at org.apache.pdfbox.util.PDFStreamEngine.processStream(PDFStreamEngine.java:215)
> at org.apache.pdfbox.util.PDFTextStripper.processPage(PDFTextStripper.java:455)
> at org.apache.pdfbox.util.PDFTextStripper.processPages(PDFTextStripper.java:379)
> at org.apache.pdfbox.util.PDFTextStripper.writeText(PDFTextStripper.java:335)
> at org.apache.pdfbox.util.PDFTextStripper.getText(PDFTextStripper.java:254)
> at de.kobv.ked.extraction.FulltextExtraction.getFulltext(FulltextExtraction.java:65)
> {code}
> Any idea or advice on how to fix that problem? Is it possible to set up a timeout for the extraction operation?
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