# Help Wanted: Linux: Lookup DOI
**URL:** https://discourse.jabref.org/t/help-wanted-linux-lookup-doi/375
**Category:** Help
**Created:** [December 7, 2016, 7:15am UTC](https://discourse.jabref.org/t/help-wanted-linux-lookup-doi/375 "2016-12-07T07:15:56Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@koppor](https://discourse.jabref.org/u/koppor)
#### Post date: [December 7, 2016, 7:15am UTC](https://discourse.jabref.org/t/help-wanted-linux-lookup-doi/375/1 "2016-12-07T07:15:57Z")
We are currently working on getting JabRef 3.6 packaged debian. The current issue is that “Lookup DOI” doesn’t seem to work well.
The profiler shows a large amount of javax.swing.text.GapContent$UndoPosRef objects. More then 3,000,000 objects.
Can anyone report back whether JabRef 3.6 works on his debian system?
The test steps are:
1. Download [https://github.com/JabRef/jabref/blob/master/src/test/resources/testbib/complex.bib](https://github.com/JabRef/jabref/blob/master/src/test/resources/testbib/complex.bib)
2. Start JabRef
3. Open complex.bib
4. Double click second entry (“DeWitt and Kuljis”) -\> entry editor opens
5. Click on “General”
6. Delete content of field “DOI”
7. Click on “Lookup DOI”
8. The DOI field should now contain “10.1145/1143120.1143122”
9. Click on “Get BibTeX data from DOI”
10. The dialog “Merge entry with DOI information” opens
11. Press “Cancel”
12. Close JabRef
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### Author:  [@mlep](https://discourse.jabref.org/u/mlep)
#### Post date: [December 7, 2016, 10:02am UTC](https://discourse.jabref.org/t/help-wanted-linux-lookup-doi/375/2 "2016-12-07T10:02:48Z")
Under Linux Mint LMDE (so Debia-based)
with java version “1.8.0\_66” Java™ SE Runtime Environment (build 1.8.0\_66-b17)
At step 7, JabRef 3.6 becomes unresponsive, using one core at 100%. No message in the console.
Note : All the steps work with JabRef 3.7