[PDFBOX-1585] org.apache.pdfbox.util.PDFTextStripper.getText() causes thread to block indefinitely

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.8.1
• Fix Version/s: 1.8.4, 2.0.0
• Component/s: Swing GUI, Text extraction
• Environment: Ubuntu Linux 10.04; Solaris 10; Java 1.6.0_34
• Assignee: Andreas Lehmkühler
• Reporter: Sascha Szott
• Created: 29/Apr/13 09:41
• Updated: 31/Jan/14 06:46
• Resolved: 06/Dec/13 21:05

Description

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:

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

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:

"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)

Any idea or advice on how to fix that problem? Is it possible to set up a timeout for the extraction operation?

Issue Links

• duplicates: PDFBOX-1668 Loading a Russian PDF never finishes