Sascha Szott created PDFBOX-1585:
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Summary: 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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