January, 2019

Wed Jan 02, 2019 by Alan Orth in Notes

2019-01-02

Linode alerted that CGSpace (linode18) had a higher outbound traffic rate than normal early this morning
I don’t see anything interesting in the web server logs around that time though:

# zcat --force /var/log/nginx/*.log /var/log/nginx/*.log.1 | grep -E "02/Jan/2019:0(1|2|3)" | awk '{print $1}' | sort | uniq -c | sort -n | tail -n 10
     92 40.77.167.4
     99 210.7.29.100
    120 38.126.157.45
    177 35.237.175.180
    177 40.77.167.32
    216 66.249.75.219
    225 18.203.76.93
    261 46.101.86.248
    357 207.46.13.1
    903 54.70.40.11

Analyzing the types of requests made by the top few IPs during that time:

# zcat --force /var/log/nginx/*.log /var/log/nginx/*.log.1 | grep -E "02/Jan/2019:0(1|2|3)" | grep 54.70.40.11 | grep -o -E "(bitstream|discover|handle)" | sort | uniq -c
     30 bitstream
    534 discover
    352 handle
# zcat --force /var/log/nginx/*.log /var/log/nginx/*.log.1 | grep -E "02/Jan/2019:0(1|2|3)" | grep 207.46.13.1 | grep -o -E "(bitstream|discover|handle)" | sort | uniq -c
    194 bitstream
    345 handle
# zcat --force /var/log/nginx/*.log /var/log/nginx/*.log.1 | grep -E "02/Jan/2019:0(1|2|3)" | grep 46.101.86.248 | grep -o -E "(bitstream|discover|handle)" | sort | uniq -c
    261 handle

It’s not clear to me what was causing the outbound traffic spike
Oh nice! The once-per-year cron job for rotating the Solr statistics actually worked now (for the first time ever!):

Moving: 81742 into core statistics-2010
Moving: 1837285 into core statistics-2011
Moving: 3764612 into core statistics-2012
Moving: 4557946 into core statistics-2013
Moving: 5483684 into core statistics-2014
Moving: 2941736 into core statistics-2015
Moving: 5926070 into core statistics-2016
Moving: 10562554 into core statistics-2017
Moving: 18497180 into core statistics-2018

This could by why the outbound traffic rate was high, due to the S3 backup that run at 3:30AM…
Run all system updates on DSpace Test (linode19) and reboot the server

2019-01-03

Update local Docker image for DSpace PostgreSQL, re-using the existing data volume:

$ sudo docker pull postgres:9.6-alpine
$ sudo docker rm dspacedb
$ sudo docker run --name dspacedb -v /home/aorth/.local/lib/containers/volumes/dspacedb_data:/var/lib/postgresql/data -e POSTGRES_PASSWORD=postgres -p 5432:5432 -d postgres:9.6-alpine

Testing DSpace 5.9 with Tomcat 8.5.37 on my local machine and I see that Atmire’s Listings and Reports still doesn’t work
- After logging in via XMLUI and clicking the Listings and Reports link from the sidebar it redirects me to a JSPUI login page
- If I log in again there the Listings and Reports work… hmm.
The JSPUI application—which Listings and Reports depends upon—also does not load, though the error is perhaps unrelated:

2019-01-03 14:45:21,727 INFO  org.dspace.browse.BrowseEngine @ anonymous:session_id=9471D72242DAA05BCC87734FE3C66EA6:ip_addr=127.0.0.1:browse_mini:
2019-01-03 14:45:21,971 INFO  org.dspace.app.webui.discovery.DiscoverUtility @ facets for scope, null: 23
2019-01-03 14:45:22,115 WARN  org.dspace.app.webui.servlet.InternalErrorServlet @ :session_id=9471D72242DAA05BCC87734FE3C66EA6:internal_error:-- URL Was: http://localhost:8080/jspui/internal-error
-- Method: GET
-- Parameters were:

org.apache.jasper.JasperException: /home.jsp (line: [214], column: [1]) /discovery/static-tagcloud-facet.jsp (line: [57], column: [8]) No tag [tagcloud] defined in tag library imported with prefix [dspace]
    at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:41)
    at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:291)
    at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:97)
    at org.apache.jasper.compiler.Parser.processIncludeDirective(Parser.java:347)
    at org.apache.jasper.compiler.Parser.parseIncludeDirective(Parser.java:380)
    at org.apache.jasper.compiler.Parser.parseDirective(Parser.java:481)
    at org.apache.jasper.compiler.Parser.parseElements(Parser.java:1445)
    at org.apache.jasper.compiler.Parser.parseBody(Parser.java:1683)
    at org.apache.jasper.compiler.Parser.parseOptionalBody(Parser.java:1016)
    at org.apache.jasper.compiler.Parser.parseCustomTag(Parser.java:1291)
    at org.apache.jasper.compiler.Parser.parseElements(Parser.java:1470)
    at org.apache.jasper.compiler.Parser.parse(Parser.java:144)
    at org.apache.jasper.compiler.ParserController.doParse(ParserController.java:244)
    at org.apache.jasper.compiler.ParserController.parse(ParserController.java:105)
    at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:202)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:373)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:350)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:334)
    at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:595)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:399)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:386)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:330)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:728)
    at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:470)
    at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:395)
    at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:316)
    at org.dspace.app.webui.util.JSPManager.showJSP(JSPManager.java:60)
    at org.apache.jsp.index_jsp._jspService(index_jsp.java:191)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:476)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:386)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:330)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.dspace.utils.servlet.DSpaceWebappServletFilter.doFilter(DSpaceWebappServletFilter.java:78)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
    at org.apache.catalina.valves.CrawlerSessionManagerValve.invoke(CrawlerSessionManagerValve.java:234)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:800)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:806)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1498)
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:748)

I notice that I get different JSESSIONID cookies for / (XMLUI) and /jspui (JSPUI) on Tomcat 8.5.37, I wonder if it’s the same on Tomcat 7.0.92… yes I do.
Hmm, on Tomcat 7.0.92 I see that I get a dspace.current.user.id session cookie after logging into XMLUI, and then when I browse to JSPUI I am still logged in…
- I didn’t see that cookie being set on Tomcat 8.5.37
I sent a message to the dspace-tech mailing list to ask

2019-01-04

Linode sent a message last night that CGSpace (linode18) had high CPU usage, but I don’t see anything around that time in the web server logs:

# zcat --force /var/log/nginx/*.log /var/log/nginx/*.log.1 | grep -E "03/Jan/2019:1(7|8|9)" | awk '{print $1}' | sort | uniq -c | sort -n | tail -n 10
    189 207.46.13.192
    217 31.6.77.23
    340 66.249.70.29
    349 40.77.167.86
    417 34.218.226.147
    630 207.46.13.173
    710 35.237.175.180
    790 40.77.167.87
   1776 66.249.70.27
   2099 54.70.40.11

I’m thinking about trying to validate our dc.subject terms against AGROVOC webservices
There seem to be a few APIs and the documentation is kinda confusing, but I found this REST endpoint that does work well, for example searching for SOIL:

$ http http://agrovoc.uniroma2.it/agrovoc/rest/v1/search?query=SOIL&lang=en
HTTP/1.1 200 OK
Access-Control-Allow-Origin: *
Connection: Keep-Alive
Content-Length: 493
Content-Type: application/json; charset=utf-8
Date: Fri, 04 Jan 2019 13:44:27 GMT
Keep-Alive: timeout=5, max=100
Server: Apache
Strict-Transport-Security: max-age=63072000; includeSubdomains
Vary: Accept
X-Content-Type-Options: nosniff
X-Frame-Options: ALLOW-FROM http://aims.fao.org

{
    "@context": {
        "@language": "en",
        "altLabel": "skos:altLabel",
        "hiddenLabel": "skos:hiddenLabel",
        "isothes": "http://purl.org/iso25964/skos-thes#",
        "onki": "http://schema.onki.fi/onki#",
        "prefLabel": "skos:prefLabel",
        "results": {
            "@container": "@list",
            "@id": "onki:results"
        },
        "skos": "http://www.w3.org/2004/02/skos/core#",
        "type": "@type",
        "uri": "@id"
    },
    "results": [
        {
            "lang": "en",
            "prefLabel": "soil",
            "type": [
                "skos:Concept"
            ],
            "uri": "http://aims.fao.org/aos/agrovoc/c_7156",
            "vocab": "agrovoc"
        }
    ],
    "uri": ""
}

The API does not appear to be case sensitive (searches for SOIL and soil return the same thing)
I’m a bit confused that there’s no obvious return code or status when a term is not found, for example SOILS:

HTTP/1.1 200 OK
Access-Control-Allow-Origin: *
Connection: Keep-Alive
Content-Length: 367
Content-Type: application/json; charset=utf-8
Date: Fri, 04 Jan 2019 13:48:31 GMT
Keep-Alive: timeout=5, max=100
Server: Apache
Strict-Transport-Security: max-age=63072000; includeSubdomains
Vary: Accept
X-Content-Type-Options: nosniff
X-Frame-Options: ALLOW-FROM http://aims.fao.org

{
    "@context": {
        "@language": "en",
        "altLabel": "skos:altLabel",
        "hiddenLabel": "skos:hiddenLabel",
        "isothes": "http://purl.org/iso25964/skos-thes#",
        "onki": "http://schema.onki.fi/onki#",
        "prefLabel": "skos:prefLabel",
        "results": {
            "@container": "@list",
            "@id": "onki:results"
        },
        "skos": "http://www.w3.org/2004/02/skos/core#",
        "type": "@type",
        "uri": "@id"
    },
    "results": [],
    "uri": ""
}

I guess the results object will just be empty…
Another way would be to try with SPARQL, perhaps using the Python 2.7 sparql-client:

$ python2.7 -m virtualenv /tmp/sparql
$ . /tmp/sparql/bin/activate
$ pip install sparql-client ipython
$ ipython
In [10]: import sparql
In [11]: s = sparql.Service("http://agrovoc.uniroma2.it:3030/agrovoc/sparql", "utf-8", "GET")
In [12]: statement=('PREFIX skos: <http://www.w3.org/2004/02/skos/core#> '
    ...: 'SELECT '
    ...: '?label '
    ...: 'WHERE { '
    ...: '{  ?concept  skos:altLabel ?label . } UNION {  ?concept  skos:prefLabel ?label . } '
    ...: 'FILTER regex(str(?label), "^fish", "i") . '
    ...: '} LIMIT 10')
In [13]: result = s.query(statement)
In [14]: for row in result.fetchone():
   ...:     print(row)
   ...:
(<Literal "fish catching"@en>,)
(<Literal "fish harvesting"@en>,)
(<Literal "fish meat"@en>,)
(<Literal "fish roe"@en>,)
(<Literal "fish conversion"@en>,)
(<Literal "fisheries catches (composition)"@en>,)
(<Literal "fishtail palm"@en>,)
(<Literal "fishflies"@en>,)
(<Literal "fishery biology"@en>,)
(<Literal "fish production"@en>,)

The SPARQL query comes from my notes in 2017-08

2019-01-06

I built a clean DSpace 5.8 installation from the upstream dspace-5.8 tag and the issue with the XMLUI/JSPUI login is still there with Tomcat 8.5.37
- If I log into XMLUI and then nagivate to JSPUI I need to log in again
- XMLUI does not set the dspace.current.user.id session cookie in Tomcat 8.5.37 for some reason
- I sent an update to the dspace-tech mailing list to ask for more help troubleshooting

2019-01-07

I built a clean DSpace 6.3 installation from the upstream dspace-6.3 tag and the issue with the XMLUI/JSPUI login is still there with Tomcat 8.5.37
- If I log into XMLUI and then nagivate to JSPUI I need to log in again
- XMLUI does not set the dspace.current.user.id session cookie in Tomcat 8.5.37 for some reason
- I sent an update to the dspace-tech mailing list to ask for more help troubleshooting

2019-01-08

Tim Donohue responded to my thread about the cookies on the dspace-tech mailing list
- He suspects it’s a change of behavior in Tomcat 8.5, and indeed I see a mention of new cookie processing in the Tomcat 8.5 migration guide
- I tried to switch my XMLUI and JSPUI contexts to use the LegacyCookieProcessor, but it didn’t seem to help
- I filed DS-4140 on the DSpace issue tracker

2019-01-11

Tezira wrote to say she has stopped receiving the DSpace Submission Approved and Archived emails from CGSpace as of January 2nd
- I told her that I haven’t done anything to disable it lately, but that I would check
- Bizu also says she hasn’t received them lately

2019-01-14

Day one of CGSpace AReS meeting in Amman

2019-01-15

Day two of CGSpace AReS meeting in Amman
- Discuss possibly extending the dspace-statistics-api to make community and collection statistics available
- Discuss new “final” CG Core document and some changes that we’ll need to do on CGSpace and other repositories
- We agreed to try to stick to pure Dublin Core where possible, then use fields that exist in standard DSpace, and use “cg” namespace for everything else
- Major changes are to move dc.contributor.author to dc.creator (which MELSpace and WorldFish are already using in their DSpace repositories)
I am testing the speed of the WorldFish DSpace repository’s REST API and it’s five to ten times faster than CGSpace as I tested in 2018-10:

$ time http --print h 'https://digitalarchive.worldfishcenter.org/rest/items?expand=metadata,bitstreams,parentCommunityList&limit=100&offset=0'

0.16s user 0.03s system 3% cpu 5.185 total
0.17s user 0.02s system 2% cpu 7.123 total
0.18s user 0.02s system 6% cpu 3.047 total

In other news, Linode sent a mail last night that the CPU load on CGSpace (linode18) was high, here are the top IPs in the logs around those few hours:

# zcat --force /var/log/nginx/*.log /var/log/nginx/*.log.1 | grep -E "14/Jan/2019:(17|18|19|20)" | awk '{print $1}' | sort | uniq -c | sort -n | tail -n 10
    157 31.6.77.23
    192 54.70.40.11
    202 66.249.64.157
    207 40.77.167.204
    220 157.55.39.140
    326 197.156.105.116
    385 207.46.13.158
   1211 35.237.175.180
   1830 66.249.64.155
   2482 45.5.186.2

2019-01-16

Day three of CGSpace AReS meeting in Amman
- We discussed CG Core 2.0 metadata and decided some action points
- We discussed branding of AReS tool
Notes from our CG Core 2.0 metadata discussion:
- Not Dublin Core:
- dc.subtype
- dc.peer-reviewed
- Dublin Core, possible action for CGSpace:
- dc.description:
  - We use dc.description.abstract, dc.description (Notes), dc.description.version (Peer review status), dc.description.sponsorship (Funder)
  - Maybe move abstract to dc.description
  - Maybe notes moves to cg.description.notes???
  - Maybe move dc.description.version to cg.peer-reviewed or cg.peer-review-status???
  - Move dc.description.sponsorship to cg.contributor.donor???
- dc.subject:
  - Wait for guidance, evaluate technical implications (Google indexing, OAI, etc)
- Move dc.contributor.author to dc.creator
- dc.contributor Project
  - Recommend against creating new fields for all projects
  - We use collections projects/themes/etc
- dc.contributor Project Lead Center
  - MELSpace uses cg.contributor.project-lead-institute (institute is more generic than center)
  - Maybe we use?
- dc.contributor Partner
  - Wait for guidance
  - MELSpace uses cg.contibutor.center (?)
- dc.contributor Donor
  - Use cg.contributor.donor
- dc.date
  - Wait for guidance, maybe move dc.date.issued?
  - dc.date.accessioned and dc.date.available are automatic in DSpace
- dc.language
  - Move dc.language.iso to dc.language
- dc.identifier
  - Move cg.identifier.url to dc.identifier
- dc.identifier bibliographicCitation
  - dc.identifier.citation should move to dc.bibliographicCitation
- dc.description.notes
  - Wait for guidance, maybe move to cg.description.notes ???
- dc.relation
  - Maybe move cg.link.reference
  - Perhaps consolodate cg.link.audio etc there…?
- dc.relation.isPartOf
  - Move dc.relation.ispartofseries to dc.relation.isPartOf
- dc.audience
  - Move cg.targetaudience to dc.audience
Something happened to the Solr usage statistics on CGSpace
- I looked on the server and the Solr cores are there (56GB!), and I don’t see any obvious errors in dmesg or anything
- I see that the server hasn’t been rebooted in 26 days so I rebooted it
After reboot the Solr stats are still messed up in the Atmire Usage Stats module, it only shows 2019-01!

Solr stats fucked up

In the Solr admin UI I see the following error:

statistics-2018: org.apache.solr.common.SolrException:org.apache.solr.common.SolrException: Error opening new searcher

Looking in the Solr log I see this:

2019-01-16 13:37:55,395 ERROR org.apache.solr.core.CoreContainer @ Error creating core [statistics-2018]: Error opening new searcher
org.apache.solr.common.SolrException: Error opening new searcher
    at org.apache.solr.core.SolrCore.<init>(SolrCore.java:873)
    at org.apache.solr.core.SolrCore.<init>(SolrCore.java:646)
    at org.apache.solr.core.CoreContainer.create(CoreContainer.java:491)
    at org.apache.solr.core.CoreContainer.create(CoreContainer.java:466)
    at org.apache.solr.handler.admin.CoreAdminHandler.handleCreateAction(CoreAdminHandler.java:575)
    at org.apache.solr.handler.admin.CoreAdminHandler.handleRequestInternal(CoreAdminHandler.java:199)
    at org.apache.solr.handler.admin.CoreAdminHandler.handleRequestBody(CoreAdminHandler.java:188)
    at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)
    at org.apache.solr.servlet.SolrDispatchFilter.handleAdminRequest(SolrDispatchFilter.java:729)
    at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:258)
    at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:207)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.dspace.solr.filters.LocalHostRestrictionFilter.doFilter(LocalHostRestrictionFilter.java:50)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:221)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
    at org.apache.catalina.valves.CrawlerSessionManagerValve.invoke(CrawlerSessionManagerValve.java:180)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:436)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.solr.common.SolrException: Error opening new searcher
    at org.apache.solr.core.SolrCore.openNewSearcher(SolrCore.java:1565)
    at org.apache.solr.core.SolrCore.getSearcher(SolrCore.java:1677)
    at org.apache.solr.core.SolrCore.<init>(SolrCore.java:845)
    ... 31 more
Caused by: org.apache.lucene.store.LockObtainFailedException: Lock obtain timed out: NativeFSLock@/home/cgspace.cgiar.org/solr/statistics-2018/data/index/write.lock
    at org.apache.lucene.store.Lock.obtain(Lock.java:89)
    at org.apache.lucene.index.IndexWriter.<init>(IndexWriter.java:753)
    at org.apache.solr.update.SolrIndexWriter.<init>(SolrIndexWriter.java:77)
    at org.apache.solr.update.SolrIndexWriter.create(SolrIndexWriter.java:64)
    at org.apache.solr.update.DefaultSolrCoreState.createMainIndexWriter(DefaultSolrCoreState.java:279)
    at org.apache.solr.update.DefaultSolrCoreState.getIndexWriter(DefaultSolrCoreState.java:111)
    at org.apache.solr.core.SolrCore.openNewSearcher(SolrCore.java:1528)
    ... 33 more
2019-01-16 13:37:55,401 ERROR org.apache.solr.core.SolrCore @ org.apache.solr.common.SolrException: Error CREATEing SolrCore 'statistics-2018': Unable to create core [statistics-2018] Caused by: Lock obtain timed out: NativeFSLock@/home/cgspace.cgiar.org/solr/statistics-2018/data/index/write.lock
    at org.apache.solr.handler.admin.CoreAdminHandler.handleCreateAction(CoreAdminHandler.java:613)
    at org.apache.solr.handler.admin.CoreAdminHandler.handleRequestInternal(CoreAdminHandler.java:199)
    at org.apache.solr.handler.admin.CoreAdminHandler.handleRequestBody(CoreAdminHandler.java:188)
    at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)
    at org.apache.solr.servlet.SolrDispatchFilter.handleAdminRequest(SolrDispatchFilter.java:729)
    at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:258)
    at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:207)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.dspace.solr.filters.LocalHostRestrictionFilter.doFilter(LocalHostRestrictionFilter.java:50)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:221)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
    at org.apache.catalina.valves.CrawlerSessionManagerValve.invoke(CrawlerSessionManagerValve.java:180)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:436)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.solr.common.SolrException: Unable to create core [statistics-2018]
    at org.apache.solr.core.CoreContainer.create(CoreContainer.java:507)
    at org.apache.solr.core.CoreContainer.create(CoreContainer.java:466)
    at org.apache.solr.handler.admin.CoreAdminHandler.handleCreateAction(CoreAdminHandler.java:575)
    ... 27 more
Caused by: org.apache.solr.common.SolrException: Error opening new searcher
    at org.apache.solr.core.SolrCore.<init>(SolrCore.java:873)
    at org.apache.solr.core.SolrCore.<init>(SolrCore.java:646)
    at org.apache.solr.core.CoreContainer.create(CoreContainer.java:491)
    ... 29 more
Caused by: org.apache.solr.common.SolrException: Error opening new searcher
    at org.apache.solr.core.SolrCore.openNewSearcher(SolrCore.java:1565)
    at org.apache.solr.core.SolrCore.getSearcher(SolrCore.java:1677)
    at org.apache.solr.core.SolrCore.<init>(SolrCore.java:845)
    ... 31 more
Caused by: org.apache.lucene.store.LockObtainFailedException: Lock obtain timed out: NativeFSLock@/home/cgspace.cgiar.org/solr/statistics-2018/data/index/write.lock
    at org.apache.lucene.store.Lock.obtain(Lock.java:89)
    at org.apache.lucene.index.IndexWriter.<init>(IndexWriter.java:753)
    at org.apache.solr.update.SolrIndexWriter.<init>(SolrIndexWriter.java:77)
    at org.apache.solr.update.SolrIndexWriter.create(SolrIndexWriter.java:64)
    at org.apache.solr.update.DefaultSolrCoreState.createMainIndexWriter(DefaultSolrCoreState.java:279)
    at org.apache.solr.update.DefaultSolrCoreState.getIndexWriter(DefaultSolrCoreState.java:111)
    at org.apache.solr.core.SolrCore.openNewSearcher(SolrCore.java:1528)
    ... 33 more

I found some threads on StackOverflow etc discussing this and several suggested increasing the address space for the shell with ulimit
I added ulimit -v unlimited to the /etc/default/tomcat7 and restarted Tomcat and now Solr is working again:

Solr stats working

Some StackOverflow discussions related to this:
Abenet was asking if the Atmire Usage Stats are correct because they are over 2 million the last few months…
For 2019-01 alone the Usage Stats are already around 1.2 million
I tried to look in the nginx logs to see how many raw requests there are so far this month and it’s about 1.4 million:

# time zcat --force /var/log/nginx/* | grep -cE "[0-9]{1,2}/Jan/2019"
1442874

real    0m17.161s
user    0m16.205s
sys     0m2.396s

2019-01-17

Send reminder to Atmire about purchasing the MQM module
Trying to decide the solid action points for CGSpace on the CG Core 2.0 metadata…
It’s difficult to decide some of these because the current CG Core 2.0 document does not provide guidance or rationale (yet)!
Also, there is not a good Dublin Core reference (or maybe I just don’t understand?)
Several authoritative documents on Dublin Core appear to be:
- Dublin Core Metadata Element Set, Version 1.1: Reference Description
- DCMI Metadata Terms
And what is the relationship between DC and DCTERMS?
DSpace uses DCTERMS in the metadata it embeds in XMLUI item views!
We really need to look at this more carefully and see the impacts that might be made from switching core fields like languages, abstract, authors, etc
We can check WorldFish and MELSpace repositories to see what effects these changes have had on theirs because they have already adopted some of these changes…
I think I understand the difference between DC and DCTERMS finally: DC is the original set of fifteen elements and DCTERMS is the newer version that was supposed to address much of the drawbacks of the original with regards to digital content
We might be able to use some proper fields for citation, abstract, etc that are part of DCTERMS
To make matters more confusing, there is also “qualified Dublin Core” that uses the original fifteen elements of legacy DC and qualifies them, like dc.date.accessioned
- According to Wikipedia Qualified Dublin Core was superseded by DCTERMS in 2008!
So we should be trying to use DCTERMS where possible, unless it is some internal thing that might mess up DSpace (like dates)
“Elements 1.1” means legacy DC
Possible action list for CGSpace:
- dc.description.abstract → dcterms.abstract
- dc.description.version → cg.peer-reviewed (or cg.peer-review-status?)
- dc.description.sponsorship → cg.contributor.donor
- dc.contributor.author → dc.creator
- dc.language.iso → dcterms.language
- cg.identifier.url → dcterms.identifier
- dc.identifier.citation → dcterms.bibliographicCitation
- dc.relation.ispartofseries → dcterms.isPartOf
- cg.targetaudience → dcterms.audience

2019-01-19

There’s no official set of Dublin Core qualifiers so I can’t tell if things like dc.contributor.author that are used by DSpace are official
I found a great presentation from 2015 by the Digital Repository of Ireland that discusses using MARC Relator Terms with Dublin Core elements
It seems that dc.contributor.author would be a supported term according to this Library of Congress list linked from the Dublin Core website
The Library of Congress document specifically says:

These terms conform with the DCMI Abstract Model and may be used in DCMI application profiles. DCMI endorses their use with Dublin Core elements as indicated.

2019-01-20

That’s weird, I logged into DSpace Test (linode19) and it says it has been up for 213 days:

# w
 04:46:14 up 213 days,  7:25,  4 users,  load average: 1.94, 1.50, 1.35

I’ve definitely rebooted it several times in the past few months… according to journalctl -b it was a few weeks ago on 2019-01-02
I re-ran the Ansible DSpace tag, ran all system updates, and rebooted the host
After rebooting I notice that the Linode kernel went down from 4.19.8 to 4.18.16…
Atmire sent a quote on our ticket about purchasing the Metadata Quality Module (MQM) for DSpace 5.8
Abenet asked me for an OpenSearch query that could generate and RSS feed for items in the Livestock CRP
According to my notes, sort_by=3 is accession date (as configured in `dspace.cfg)
The query currently shows 3023 items, but a Discovery search for Livestock CRP only returns 858 items
That query seems to return items tagged with Livestock and Fish CRP as well… hmm.

2019-01-21

Investigating running Tomcat 7 on Ubuntu 18.04 with the tarball and a custom systemd package instead of waiting for our DSpace to get compatible with Ubuntu 18.04’s Tomcat 8.5
I could either run with a simple tomcat7.service like this:

[Unit]
Description=Apache Tomcat 7 Web Application Container
After=network.target
[Service]
Type=forking
ExecStart=/path/to/apache-tomcat-7.0.92/bin/startup.sh
ExecStop=/path/to/apache-tomcat-7.0.92/bin/shutdown.sh
User=aorth
Group=aorth
[Install]
WantedBy=multi-user.target

Or try to use adapt a real systemd service like Arch Linux’s:

[Unit]
Description=Tomcat 7 servlet container
After=network.target

[Service]
Type=forking
PIDFile=/var/run/tomcat7.pid
Environment=CATALINA_PID=/var/run/tomcat7.pid
Environment=TOMCAT_JAVA_HOME=/usr/lib/jvm/default-runtime
Environment=CATALINA_HOME=/usr/share/tomcat7
Environment=CATALINA_BASE=/usr/share/tomcat7
Environment=CATALINA_OPTS=
Environment=ERRFILE=SYSLOG
Environment=OUTFILE=SYSLOG

ExecStart=/usr/bin/jsvc \
            -Dcatalina.home=${CATALINA_HOME} \
            -Dcatalina.base=${CATALINA_BASE} \
            -Djava.io.tmpdir=/var/tmp/tomcat7/temp \
            -cp /usr/share/java/commons-daemon.jar:/usr/share/java/eclipse-ecj.jar:${CATALINA_HOME}/bin/bootstrap.jar:${CATALINA_HOME}/bin/tomcat-juli.jar \
            -user tomcat7 \
            -java-home ${TOMCAT_JAVA_HOME} \
            -pidfile /var/run/tomcat7.pid \
            -errfile ${ERRFILE} \
            -outfile ${OUTFILE} \
            $CATALINA_OPTS \
            org.apache.catalina.startup.Bootstrap

ExecStop=/usr/bin/jsvc \
            -pidfile /var/run/tomcat7.pid \
            -stop \
            org.apache.catalina.startup.Bootstrap

[Install]
WantedBy=multi-user.target

I see that jsvc and libcommons-daemon-java are both available on Ubuntu so that should be easy to port
We probably don’t need Eclipse Java Bytecode Compiler (ecj)
I tested Tomcat 7.0.92 on Arch Linux using the tomcat7.service with jsvc and it works… nice!
I think I might manage this the same way I do the restic releases in the Ansible infrastructure scripts, where I download a specific version and symlink to some generic location without the version number
I verified that there is indeed an issue with sharded Solr statistics cores on DSpace, which will cause inaccurate results in the dspace-statistics-api:

$ http 'http://localhost:3000/solr/statistics/select?indent=on&rows=0&q=type:2+id:11576&fq=isBot:false&fq=statistics_type:view' | grep numFound
<result name="response" numFound="33" start="0">
$ http 'http://localhost:3000/solr/statistics-2018/select?indent=on&rows=0&q=type:2+id:11576&fq=isBot:false&fq=statistics_type:view' | grep numFound
<result name="response" numFound="241" start="0">

I opened an issue on the GitHub issue tracker (#10)
I don’t think the SolrClient library we are currently using supports these type of queries so we might have to just do raw queries with requests
The pysolr library says it supports multicore indexes, but I am not sure it does (or at least not with our setup):

import pysolr
solr = pysolr.Solr('http://localhost:3000/solr/statistics')
results = solr.search('type:2', **{'fq': 'isBot:false AND statistics_type:view', 'facet': 'true', 'facet.field': 'id', 'facet.mincount': 1, 'facet.limit': 10, 'facet.offset': 0, 'rows': 0})
print(results.facets['facet_fields'])
{'id': ['77572', 646, '93185', 380, '92932', 375, '102499', 372, '101430', 337, '77632', 331, '102449', 289, '102485', 276, '100849', 270, '47080', 260]}

If I double check one item from above, for example 77572, it appears this is only working on the current statistics core and not the shards:

import pysolr
solr = pysolr.Solr('http://localhost:3000/solr/statistics')
results = solr.search('type:2 id:77572', **{'fq': 'isBot:false AND statistics_type:view'})
print(results.hits)
646
solr = pysolr.Solr('http://localhost:3000/solr/statistics-2018/')
results = solr.search('type:2 id:77572', **{'fq': 'isBot:false AND statistics_type:view'})
print(results.hits)
595

So I guess I need to figure out how to use join queries and maybe even switch to using raw Python requests with JSON
This enumerates the list of Solr cores and returns JSON format:

http://localhost:3000/solr/admin/cores?action=STATUS&wt=json

I think I figured out how to search across shards, I needed to give the whole URL to each other core
Now I get more results when I start adding the other statistics cores:

$ http 'http://localhost:3000/solr/statistics/select?&indent=on&rows=0&q=*:*' | grep numFound<result name="response" numFound="2061320" start="0">
$ http 'http://localhost:3000/solr/statistics/select?&shards=localhost:8081/solr/statistics-2018&indent=on&rows=0&q=*:*' | grep numFound
<result name="response" numFound="16280292" start="0" maxScore="1.0">
$ http 'http://localhost:3000/solr/statistics/select?&shards=localhost:8081/solr/statistics-2018,localhost:8081/solr/statistics-2017&indent=on&rows=0&q=*:*' | grep numFound
<result name="response" numFound="25606142" start="0" maxScore="1.0">
$ http 'http://localhost:3000/solr/statistics/select?&shards=localhost:8081/solr/statistics-2018,localhost:8081/solr/statistics-2017,localhost:8081/solr/statistics-2016&indent=on&rows=0&q=*:*' | grep numFound
<result name="response" numFound="31532212" start="0" maxScore="1.0">

I should be able to modify the dspace-statistics-api to check the shards via the Solr core status, then add the shards parameter to each query to make the search distributed among the cores
I implemented a proof of concept to query the Solr STATUS for active cores and to add them with a shards query string
A few things I noticed:
- Solr doesn’t mind if you use an empty shards parameter
- Solr doesn’t mind if you have an extra comma at the end of the shards parameter
- If you are searching multiple cores, you need to include the base core in the shards parameter as well
- For example, compare the following two queries, first including the base core and the shard in the shards parameter, and then only including the shard:

$ http 'http://localhost:8081/solr/statistics/select?indent=on&rows=0&q=type:2+id:11576&fq=isBot:false&fq=statistics_type:view&shards=localhost:8081/solr/statistics,localhost:8081/solr/statistics-2018' | grep numFound
<result name="response" numFound="275" start="0" maxScore="12.205825">
$ http 'http://localhost:8081/solr/statistics/select?indent=on&rows=0&q=type:2+id:11576&fq=isBot:false&fq=statistics_type:view&shards=localhost:8081/solr/statistics-2018' | grep numFound
<result name="response" numFound="241" start="0" maxScore="12.205825">

2019-01-22

Release version 0.9.0 of the dspace-statistics-api to address the issue of querying multiple Solr statistics shards
I deployed it on DSpace Test (linode19) and restarted the indexer and now it shows all the stats from 2018 as well (756 pages of views, intead of 6)
I deployed it on CGSpace (linode18) and restarted the indexer as well

2019-01-23

Peter noticed that some goo.gl links in our tweets from Feedburner are broken, for example this one from last week:

#ILRI research: Towards unlocking the potential of the hides and skins value chain in Somaliland https://t.co/EZH7ALW4dp
— ILRI Communications (@ILRI) January 18, 2019

The shortened link is goo.gl/fb/VRj9Gq and it shows a “Dynamic Link not found” error from Firebase:

Dynamic Link not found

Apparently Google announced last year that they plan to discontinue the shortner and transition to Firebase Dynamic Links in March, 2019, so maybe this is related…
Very interesting discussion of methods for running Tomcat under systemd
We can set the ulimit options that used to be in /etc/default/tomcat7 with systemd’s LimitNOFILE and LimitAS (see the systemd.exec man page)
- Note that we need to use infinity instead of unlimited for the address space