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JabRef freezes when trying to search #7942

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Closed
JabRef freezes when trying to search#7942
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btut
Labels
component: search
@wujastyk

Description

@wujastyk
wujastyk
opened on Jul 26, 2021

JabRef version

JabRef 5.4--2021-07-24--1cdd807
Linux 5.4.0-80-generic amd64
Java 16.0.1
JavaFX 16+8

Steps to reproduce the behavior:

  1. start program
  2. type the first five chars of a search string
  3. JabRef freezes, or goes to sleep.

The System Monitor (top) shows 1.3GB of memory being used by JabRef,

image

and also the full resources of several processors (no other active tasks):

image

Log File 
JERROR StatusLogger Unrecognized format specifier [d]
ERROR StatusLogger Unrecognized conversion specifier [d] starting at position 16 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [thread]
ERROR StatusLogger Unrecognized conversion specifier [thread] starting at position 25 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [level]
ERROR StatusLogger Unrecognized conversion specifier [level] starting at position 35 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [logger]
ERROR StatusLogger Unrecognized conversion specifier [logger] starting at position 47 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [msg]
ERROR StatusLogger Unrecognized conversion specifier [msg] starting at position 54 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [n]
ERROR StatusLogger Unrecognized conversion specifier [n] starting at position 56 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [d]
ERROR StatusLogger Unrecognized conversion specifier [d] starting at position 16 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [thread]
ERROR StatusLogger Unrecognized conversion specifier [thread] starting at position 25 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [level]
ERROR StatusLogger Unrecognized conversion specifier [level] starting at position 35 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [logger]
ERROR StatusLogger Unrecognized conversion specifier [logger] starting at position 47 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [msg]
ERROR StatusLogger Unrecognized conversion specifier [msg] starting at position 54 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [n]
ERROR StatusLogger Unrecognized conversion specifier [n] starting at position 56 in conversion pattern.
Jul 26, 2021 9:09:15 AM com.sun.javafx.application.PlatformImpl startup
WARNING: Unsupported JavaFX configuration: classes were loaded from 'module org.jabref.merged.module', isAutomatic: false, isOpen: true

(JabRef:9523): Gdk-WARNING **: 09:09:18.300: XSetErrorHandler() called with a GDK error trap pushed. Don't do that.
%d [%thread] %-5level %logger - %msg%n java.io.IOException: Error: Header doesn't contain versioninfo
  at org.apache.pdfbox.pdfparser.PDFParser.parse(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readPdfContents(Unknown Source) ~[org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readLinkedPdf(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.writeToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.gui.util.DefaultTaskExecutor$1.call(Unknown Source) [org.jabref:?]
  at javafx.concurrent.Task$TaskCallable.call(Unknown Source) [org.jabref.merged.module:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:?]
  at java.lang.Thread.run(Unknown Source) [?:?]
%d [%thread] %-5level %logger - %msg%n java.io.IOException: Error: Header doesn't contain versioninfo
  at org.apache.pdfbox.pdfparser.PDFParser.parse(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readPdfContents(Unknown Source) ~[org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readLinkedPdf(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.writeToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.gui.util.DefaultTaskExecutor$1.call(Unknown Source) [org.jabref:?]
  at javafx.concurrent.Task$TaskCallable.call(Unknown Source) [org.jabref.merged.module:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:?]
  at java.lang.Thread.run(Unknown Source) [?:?]
%d [%thread] %-5level %logger - %msg%n java.io.IOException: Error: Header doesn't contain versioninfo
  at org.apache.pdfbox.pdfparser.PDFParser.parse(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readPdfContents(Unknown Source) ~[org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readLinkedPdf(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.writeToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.gui.util.DefaultTaskExecutor$1.call(Unknown Source) [org.jabref:?]
  at javafx.concurrent.Task$TaskCallable.call(Unknown Source) [org.jabref.merged.module:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:?]
  at java.lang.Thread.run(Unknown Source) [?:?]
%d [%thread] %-5level %logger - %msg%n java.io.IOException: Unknown dir object c=')' cInt=41 peek=')' peekInt=41 at offset 9892175 (start offset: 9892175)
  at org.apache.pdfbox.pdfparser.BaseParser.parseDirObject(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdfparser.BaseParser.parseCOSDictionaryValue(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdfparser.BaseParser.parseCOSDictionaryNameValuePair(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdfparser.BaseParser.parseCOSDictionary(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdfparser.BaseParser.parseDirObject(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdfparser.COSParser.parseFileObject(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdfparser.COSParser.parseObjectDynamically(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdfparser.COSParser.parseObjectDynamically(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdfparser.COSParser.parseTrailerValuesDynamically(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdfparser.PDFParser.initialParse(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdfparser.PDFParser.parse(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readPdfContents(Unknown Source) ~[org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readLinkedPdf(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.writeToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.gui.util.DefaultTaskExecutor$1.call(Unknown Source) [org.jabref:?]
  at javafx.concurrent.Task$TaskCallable.call(Unknown Source) [org.jabref.merged.module:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:?]
  at java.lang.Thread.run(Unknown Source) [?:?]
%d [%thread] %-5level %logger - %msg%n java.io.IOException: Error: End-of-File, expected line
  at org.apache.pdfbox.pdfparser.BaseParser.readLine(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdfparser.COSParser.parseHeader(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdfparser.COSParser.parsePDFHeader(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdfparser.PDFParser.parse(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readPdfContents(Unknown Source) ~[org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readLinkedPdf(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.writeToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.gui.util.DefaultTaskExecutor$1.call(Unknown Source) [org.jabref:?]
  at javafx.concurrent.Task$TaskCallable.call(Unknown Source) [org.jabref.merged.module:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:?]
  at java.lang.Thread.run(Unknown Source) [?:?]
%d [%thread] %-5level %logger - %msg%n java.io.IOException: Error: Header doesn't contain versioninfo
  at org.apache.pdfbox.pdfparser.PDFParser.parse(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readPdfContents(Unknown Source) ~[org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readLinkedPdf(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.writeToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.gui.util.DefaultTaskExecutor$1.call(Unknown Source) [org.jabref:?]
  at javafx.concurrent.Task$TaskCallable.call(Unknown Source) [org.jabref.merged.module:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:?]
  at java.lang.Thread.run(Unknown Source) [?:?]
%d [%thread] %-5level %logger - %msg%n java.io.IOException: Error: Header doesn't contain versioninfo
  at org.apache.pdfbox.pdfparser.PDFParser.parse(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readPdfContents(Unknown Source) ~[org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readLinkedPdf(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.writeToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.gui.util.DefaultTaskExecutor$1.call(Unknown Source) [org.jabref:?]
  at javafx.concurrent.Task$TaskCallable.call(Unknown Source) [org.jabref.merged.module:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:?]
  at java.lang.Thread.run(Unknown Source) [?:?]
%d [%thread] %-5level %logger - %msg%n java.io.IOException: Error: Header doesn't contain versioninfo
  at org.apache.pdfbox.pdfparser.PDFParser.parse(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readPdfContents(Unknown Source) ~[org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readLinkedPdf(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.writeToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.gui.util.DefaultTaskExecutor$1.call(Unknown Source) [org.jabref:?]
  at javafx.concurrent.Task$TaskCallable.call(Unknown Source) [org.jabref.merged.module:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:?]
  at java.lang.Thread.run(Unknown Source) [?:?]
%d [%thread] %-5level %logger - %msg%n java.io.IOException: Error: End-of-File, expected line
  at org.apache.pdfbox.pdfparser.BaseParser.readLine(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdfparser.COSParser.parseHeader(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdfparser.COSParser.parsePDFHeader(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdfparser.PDFParser.parse(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readPdfContents(Unknown Source) ~[org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readLinkedPdf(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.writeToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.gui.util.DefaultTaskExecutor$1.call(Unknown Source) [org.jabref:?]
  at javafx.concurrent.Task$TaskCallable.call(Unknown Source) [org.jabref.merged.module:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:?]
  at java.lang.Thread.run(Unknown Source) [?:?]
%d [%thread] %-5level %logger - %msg%n java.io.IOException: Error: Header doesn't contain versioninfo
  at org.apache.pdfbox.pdfparser.PDFParser.parse(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readPdfContents(Unknown Source) ~[org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readLinkedPdf(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.writeToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.gui.util.DefaultTaskExecutor$1.call(Unknown Source) [org.jabref:?]
  at javafx.concurrent.Task$TaskCallable.call(Unknown Source) [org.jabref.merged.module:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:?]
  at java.lang.Thread.run(Unknown Source) [?:?]
%d [%thread] %-5level %logger - %msg%n java.io.IOException: Error: End-of-File, expected line
  at org.apache.pdfbox.pdfparser.BaseParser.readLine(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdfparser.COSParser.parseHeader(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdfparser.COSParser.parsePDFHeader(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdfparser.PDFParser.parse(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readPdfContents(Unknown Source) ~[org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readLinkedPdf(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.writeToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.gui.util.DefaultTaskExecutor$1.call(Unknown Source) [org.jabref:?]
  at javafx.concurrent.Task$TaskCallable.call(Unknown Source) [org.jabref.merged.module:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:?]
  at java.lang.Thread.run(Unknown Source) [?:?]
%d [%thread] %-5level %logger - %msg%n java.io.IOException: Error: Header doesn't contain versioninfo
  at org.apache.pdfbox.pdfparser.PDFParser.parse(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readPdfContents(Unknown Source) ~[org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readLinkedPdf(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.writeToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.gui.util.DefaultTaskExecutor$1.call(Unknown Source) [org.jabref:?]
  at javafx.concurrent.Task$TaskCallable.call(Unknown Source) [org.jabref.merged.module:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:?]
  at java.lang.Thread.run(Unknown Source) [?:?]
%d [%thread] %-5level %logger - %msg%n java.io.IOException: Error: Header doesn't contain versioninfo
  at org.apache.pdfbox.pdfparser.PDFParser.parse(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readPdfContents(Unknown Source) ~[org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readLinkedPdf(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.writeToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.gui.util.DefaultTaskExecutor$1.call(Unknown Source) [org.jabref:?]
  at javafx.concurrent.Task$TaskCallable.call(Unknown Source) [org.jabref.merged.module:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:?]
  at java.lang.Thread.run(Unknown Source) [?:?]
%d [%thread] %-5level %logger - %msg%n java.io.IOException: Error: Header doesn't contain versioninfo
  at org.apache.pdfbox.pdfparser.PDFParser.parse(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readPdfContents(Unknown Source) ~[org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readLinkedPdf(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.writeToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.gui.util.DefaultTaskExecutor$1.call(Unknown Source) [org.jabref:?]
  at javafx.concurrent.Task$TaskCallable.call(Unknown Source) [org.jabref.merged.module:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:?]
  at java.lang.Thread.run(Unknown Source) [?:?]
%d [%thread] %-5level %logger - %msg%n java.io.IOException: Error: Header doesn't contain versioninfo
  at org.apache.pdfbox.pdfparser.PDFParser.parse(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readPdfContents(Unknown Source) ~[org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readLinkedPdf(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.writeToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.gui.util.DefaultTaskExecutor$1.call(Unknown Source) [org.jabref:?]
  at javafx.concurrent.Task$TaskCallable.call(Unknown Source) [org.jabref.merged.module:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:?]
  at java.lang.Thread.run(Unknown Source) [?:?]
%d [%thread] %-5level %logger - %msg%n java.io.IOException: Error: Header doesn't contain versioninfo
  at org.apache.pdfbox.pdfparser.PDFParser.parse(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readPdfContents(Unknown Source) ~[org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readLinkedPdf(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.writeToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.gui.util.DefaultTaskExecutor$1.call(Unknown Source) [org.jabref:?]
  at javafx.concurrent.Task$TaskCallable.call(Unknown Source) [org.jabref.merged.module:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:?]
  at java.lang.Thread.run(Unknown Source) [?:?]
%d [%thread] %-5level %logger - %msg%n java.io.IOException: Error: Header doesn't contain versioninfo
  at org.apache.pdfbox.pdfparser.PDFParser.parse(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.apache.pdfbox.pdmodel.PDDocument.load(Unknown Source) ~[org.jabref.merged.module:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readPdfContents(Unknown Source) ~[org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.DocumentReader.readLinkedPdf(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.writeToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.PdfIndexer.addToIndex(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.logic.pdf.search.indexing.IndexingTaskManager$2.call(Unknown Source) [org.jabref:?]
  at org.jabref.gui.util.DefaultTaskExecutor$1.call(Unknown Source) [org.jabref:?]
  at javafx.concurrent.Task$TaskCallable.call(Unknown Source) [org.jabref.merged.module:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:?]
  at java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:?]
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:?]
  at java.lang.Thread.run(Unknown Source) [?:?]

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