Using either jabref 4.2 or the latest master version, when I

• "import into current library" (control I)
• select a bib file
• hit the "Open" button
  the program freezes. The import window never closes, and I have to hit "Force quit" to exit.

I did not see any error messages in the log file.

Error occurs using either latest development or 4.2

JabRef 4.3-dev--snapshot--2018-04-29--master--f703f3e3f
Linux 4.15.0-20-generic amd64
Java 1.8.0_171

JabRef 4.2
Linux 4.15.0-20-generic amd64
Java 1.8.0_171

java -version
java version "1.8.0_171"
Java(TM) SE Runtime Environment (build 1.8.0_171-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.171-b11, mixed mode)

sudo update-alternatives --config java

There are 3 choices for the alternative java (providing /usr/bin/java).

Selection Path Priority Status

0 /usr/lib/jvm/java-11-openjdk-amd64/bin/java 1101 auto mode
1 /usr/lib/jvm/java-11-openjdk-amd64/bin/java 1101 manual mode
2 /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java 1081 manual mode

• 3 /usr/lib/jvm/java-8-oracle/jre/bin/java 1081 manual mode

When I run jabref from command line, I get the following output. At the end, you can see that it was killed, but no errors to my eye. There are some errors concerning finding my journal abbreviations file, but jabref eventually loads the right file.

java -jar /opt/jabref/JabRef-4.2.jar
Gtk-Message: 08:10:32.436: Failed to load module "canberra-gtk-module"
08:10:35.483 [AWT-EventQueue-0] INFO org.jabref.logic.importer.OpenDatabase - Opening: /home/singer/Library/TeXInputs/bib/jones.bib
08:10:36.097 [AWT-EventQueue-0] INFO org.jabref.logic.importer.OpenDatabase - Opening: /home/singer/Projects/Electrokinetics/Notes/Bibliography/ReverseMicelles/ReverseMicelles.bib
File: grouptree.fxml not found, attempting with camel case
File: grouptree.css not found, attempting with camel case
08:10:37.713 [AWT-EventQueue-0] INFO org.jabref.logic.journals.JournalAbbreviationLoader - Personal journal list file '/home/singer/Library/TeXInputs/bib/JournalAbbrev' not found.
java.io.FileNotFoundException: /home/singer/Library/TeXInputs/bib/JournalAbbrev (No such file or directory)
at java.io.FileInputStream.open0(Native Method) ~[?:1.8.0_171]
at java.io.FileInputStream.open(FileInputStream.java:195) ~[?:1.8.0_171]
at java.io.FileInputStream.(FileInputStream.java:138) ~[?:1.8.0_171]
at org.jabref.logic.journals.AbbreviationParser.readJournalListFromFile(AbbreviationParser.java:52) ~[JabRef-4.2.jar:?]
at org.jabref.logic.journals.JournalAbbreviationLoader.readJournalListFromFile(JournalAbbreviationLoader.java:51) ~[JabRef-4.2.jar:?]
at org.jabref.logic.journals.JournalAbbreviationLoader.update(JournalAbbreviationLoader.java:91) ~[JabRef-4.2.jar:?]
at org.jabref.logic.journals.JournalAbbreviationLoader.getRepository(JournalAbbreviationLoader.java:102) ~[JabRef-4.2.jar:?]
at org.jabref.gui.autocompleter.JournalsSuggestionProvider.(JournalsSuggestionProvider.java:18) ~[JabRef-4.2.jar:?]
at org.jabref.gui.autocompleter.SuggestionProviders.initalizeSuggestionProvider(SuggestionProviders.java:66) ~[JabRef-4.2.jar:?]
at org.jabref.gui.autocompleter.SuggestionProviders.(SuggestionProviders.java:35) ~[JabRef-4.2.jar:?]
at org.jabref.gui.BasePanel.setupAutoCompletion(BasePanel.java:1442) ~[JabRef-4.2.jar:?]
at org.jabref.gui.BasePanel.setupMainPanel(BasePanel.java:1420) ~[JabRef-4.2.jar:?]
at org.jabref.gui.BasePanel.(BasePanel.java:228) ~[JabRef-4.2.jar:?]
at org.jabref.gui.JabRefFrame.addTab(JabRefFrame.java:1604) ~[JabRef-4.2.jar:?]
at org.jabref.gui.JabRefFrame.addParserResult(JabRefFrame.java:1304) ~[JabRef-4.2.jar:?]
at org.jabref.JabRefGUI.openWindow(JabRefGUI.java:131) ~[JabRef-4.2.jar:?]
at org.jabref.JabRefGUI.(JabRefGUI.java:60) ~[JabRef-4.2.jar:?]
at org.jabref.JabRefMain.lambda$start$0(JabRefMain.java:182) ~[JabRef-4.2.jar:?]
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311) [?:1.8.0_171]
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758) [?:1.8.0_171]
at java.awt.EventQueue.access$500(EventQueue.java:97) [?:1.8.0_171]
at java.awt.EventQueue$3.run(EventQueue.java:709) [?:1.8.0_171]
at java.awt.EventQueue$3.run(EventQueue.java:703) [?:1.8.0_171]
at java.security.AccessController.doPrivileged(Native Method) [?:1.8.0_171]
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80) [?:1.8.0_171]
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728) [?:1.8.0_171]
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205) [?:1.8.0_171]
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116) [?:1.8.0_171]
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105) [?:1.8.0_171]
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) [?:1.8.0_171]
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93) [?:1.8.0_171]
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82) [?:1.8.0_171]
Killed