Hi there,

 we are struggling for a long time already with this issue that under
unidentified circumstances our DSpace Instances stop delivering service
documents via SwordV2.

I do multiple setups where I follow identical installation instructions
line by line, and yet I am able to obtain this behavior on one machine
and not on another. However, the issue is not deliberately reproducible.
Basically we have no idea when it happens nor what may be the cause.

Here it can be observed:

Working machine:

curl -i https://vm-152-118.bwcloud.uni-ulm.de/swordv2/servicedocument
--user 'katako...@gmail.com:iamthebest'

<service xmlns="http://www.w3.org/2007/app";
xmlns:atom="http://www.w3.org/2005/Atom";><workspace><atom:title
type="text">bwFDM test DSpace</atom:title><collection
href="https://vm-152-118.bwcloud.uni-ulm.de/xmlui/handle/123456789/1";><atom:title
type="text">Faculty of Education</atom:title><mediation
xmlns="http://purl.org/net/sword/terms/";>true</mediation><service
xmlns="http://purl.org/net/sword/terms/";>https://vm-152-118.bwcloud.uni-ulm.de/swordv2/servicedocument/123456789/1</service></collection><collection
href="https://vm-152-118.bwcloud.uni-ulm.de/xmlui/handle/123456789/2";><atom:title
type="text">Faculty of Science and Technology</atom:title><mediation
xmlns="http://purl.org/net/sword/terms/";>true</mediation><service
xmlns="http://purl.org/net/sword/terms/";>https://vm-152-118.bwcloud.uni-ulm.de/swordv2/servicedocument/123456789/2</service></collection><collection
href="https://vm-152-118.bwcloud.uni-ulm.de/xmlui/handle/123456789/12";><atom:title
type="text">Oparu Bibliography</atom:title><mediation
xmlns="http://purl.org/net/sword/terms/";>true</mediation><service
xmlns="http://purl.org/net/sword/terms/";>https://vm-152-118.bwcloud.uni-ulm.de/swordv2/servicedocument/123456789/12</service><abstract
xmlns="http://purl.org/dc/terms/";>for performance
testing...</abstract></collection></workspace><generator
xmlns="http://www.w3.org/2005/Atom";
uri="http://www.dspace.org/ns/sword/2.0/";
version="2.0">bwfdm.dspacet...@gmail.com</generator><version
xmlns="http://purl.org/net/sword/terms/";>2.0</version></service>

Non-Working machine:

curl -i
http://dspace5-test.sara-service.org:8080/swordv2/servicedocument --user
'katako...@gmail.com:iamthebest'

HTTP/1.1 200 OK
Server: Apache-Coyote/1.1
Transfer-Encoding: chunked
Date: Mon, 26 Nov 2018 13:42:41 GMT

curl: (18) transfer closed with outstanding read data remaining

What is strange is that I can obtain a sword service document whereas I
can't on the okay-working machine:

curl -i http://dspace5-test.sara-service.org:8080/sword/servicedocument
--user 'katako...@gmail.com:iamthebest'

HTTP/1.1 200 OK
Server: Apache-Coyote/1.1
Content-Type: application/atomsvc+xml;charset=UTF-8
Transfer-Encoding: chunked
Date: Mon, 26 Nov 2018 13:44:11 GMT

<?xml version="1.0" encoding="UTF-8"?>
<app:service xmlns:app="http://www.w3.org/2007/app";
xmlns:sword="http://purl.org/net/sword/";
xmlns:dcterms="http://purl.org/dc/terms/";
xmlns:atom="http://www.w3.org/2005/Atom";>
   <sword:version>1.3</sword:version>
   <sword:verbose>true</sword:verbose>
   <sword:noOp>true</sword:noOp>
   <sword:maxUploadSize>-1</sword:maxUploadSize>
   <atom:generator uri="http://www.dspace.org/ns/sword/1.3.1";
version="1.3"/>
   <app:workspace>
      <atom:title type="text">SARA DSpace 5 Test Instance</atom:title>
   </app:workspace>
</app:service>

We find this an issue for both DSpace5 and DSpace6, in DSpace5 however
it seems to happen much more frequently.

Clues & suggestions are highly welcome!

With best regards
Stefan

-- 
Stefan Kombrink
Universität Ulm
Kommunikations- und Informationszentrum (kiz)
Abteilung Informationsmedien
+49-731-50-31482

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