not sure if related, but been seeing intermittent qunit issues with wikibase, such as:
https://integration.wikimedia.org/ci/job/mwext-Wikibase-qunit/13386/consoleFull
10:45:22 Chromium 44.0.2403 (Ubuntu 0.0.0) LOG: 'Exception in module-execute in module wikibase.experts.Item.tests:'
10:45:22 Chromium 44.0.2403 (Ubuntu 0.0.0) ERROR: 'TypeError: testExpert is not a function', TypeError{}
10:45:22 Chromium 44.0.2403 (Ubuntu 0.0.0) LOG: 'Exception in module-execute in module wikibase.experts.Property.tests:'
10:45:22 Chromium 44.0.2403 (Ubuntu 0.0.0) ERROR: 'TypeError: testExpert is not a function', TypeError{}
10:45:23 ..
10:45:23 Chromium 44.0.2403 (Ubuntu 0.0.0) test.mediawiki.qunit.testrunner Loader status FAILED
10:45:23 Modules in error state
10:45:23 Expected:
10:45:23 Actual: wikibase.experts.Item.tests,wikibase.experts.Property.tests
10:45:23 at Object.<anonymous> (http://localhost:9876/jenkins-mwext-Wikibase-qunit-13386/load.php?debug=false&lang=en&modules=test.mediawiki.qunit.suites%2Ctestrunner%7Ctest.sinonjs%7Cuser.defaults%7Cutil.CombiningMessageProvider%2CExtendable%2CHashMessageProvider%2CMessageProvider%2CNotifier%2CPrefixingMessageProvider%2ChighlightSubstring%2Cinherit%7Cutil.HashMessageProvider.tests%7Cutil.Notifier.tests%7Cutil.highlightSubstring.tests%7CvalueFormatters%2CvalueParsers%2Cwikibase%7CvalueFormatters.ValueFormatter%2CValueFormatterStore%2Cformatters%2Ctests%7CvalueParsers.ValueParser%2CValueParserStore%2Cparsers%2Ctests%7Cwikibase.Site%2CValueViewBuilder%2CbuildErrorOutput%2CdataTypeStore%2Cdatamodel%7Cwikibase.Site.tests%7Cwikibase.ValueViewBuilder.tests%7Cwikibase.api.RepoApi%2CRepoApiError%2C__namespace%2CgetLocationAgnosticMwApi%7Cwikibase.api.RepoApi.tests%7Cwikibase.api.RepoApiError.tests%7Cwikibase.dataTypeStore.tests%7Cwikibase.datamodel.Claim%2CClaimGroup%2CClaimGroupSet%2CClaimList%2CEntity%2CEntityId%2CFingerprint%2CGroup%2CGroupableCollection%2CItem%2CList%2CMap%2CMultiTerm%2CMultiTermMap%2CProperty%2CPropertyNoValueSnak%2CPropertySomeValueSnak%2CPropertyValueSnak%2CReference%2CReferenceList%2CSet%2CSiteLink%2CSiteLinkSet%2CSnak%2CSnakList%2CStatement%2CStatementGroup%7Cwikibase.datamodel.Claim.tests%7Cwikibase.datamodel.ClaimGroup.tests%7Cwikibase.datamodel.ClaimGroupSet.tests%7Cwikibase.datamodel.ClaimList.tests%7Cwikibase.datamodel.EntityId.tests%7Cwikibase.datamodel.Fingerprint.tests%7Cwikibase.datamodel.Group.tests%7Cwikibase.datamodel.Item.tests%7Cwikibase.datamodel.List.tests%7Cwikibase.datamodel.Map.tests%7Cwikibase.datamodel.MultiTerm.tests%7Cwikibase.datamodel.MultiTermMap.tests%7Cwikibase.datamodel.Property.tests%7Cwikibase.datamodel.Reference.tests%7Cwikibase.datamodel.ReferenceList.tests%7Cwikibase.datamodel.Set.tests%7Cwikibase.datamodel.SiteLink.tests%7Cwikibase.datamodel.SiteLinkSet.tests%7Cwikibase.datamodel.Snak.tests%7Cwikibase.datamodel.SnakList.tests%7Cwikibase.datamodel.Statement.tests&skin=fallback&version=4bc53ed9e49c:280:464)
10:45:23 at Object.Test.run (/mnt/jenkins-workspace/workspace/mwext-Wikibase-qunit/src/node_modules/qunitjs/qunit/qunit.js:895:28)
10:45:23 at /mnt/jenkins-workspace/workspace/mwext-Wikibase-qunit/src/node_modules/qunitjs/qunit/qunit.js:1024:11
10:45:23 at process (/mnt/jenkins-workspace/workspace/mwext-Wikibase-qunit/src/node_modules/qunitjs/qunit/qunit.js:583:24)
10:45:23 at begin (/mnt/jenkins-workspace/workspace/mwext-Wikibase-qunit/src/node_modules/qunitjs/qunit/qunit.js:628:2)
10:45:23 at /mnt/jenkins-workspace/workspace/mwext-Wikibase-qunit/src/node_modules/qunitjs/qunit/qunit.js:644:4appears to be db failures to insert resource loader blobs into MessageBlobStore:
https://integration.wikimedia.org/ci/job/mwext-Wikibase-qunit/13386/artifact/log/mw-debug-www.log
0.2809 17.5M SQL ERROR: database is locked
0.2812 17.5M MessageBlobStore::insertMessageBlob failed to update DB: exception 'DBQueryError' with message 'A database error has occurred. Did you forget to run maintenance/update.php after upgrading? See: https://www.mediawiki.org/wiki/Manual:Upgrading#Run_the_update_script
Query: INSERT OR IGNORE INTO msg_resource (mr_lang,mr_resource,mr_blob,mr_timestamp) VALUES ('en','jquery.ui.core.styles','{}','20150904104520')
Function: MessageBlobStore::insertMessageBlob/single-row
Error: 5 database is locked
' in /mnt/jenkins-workspace/workspace/mwext-Wikibase-qunit/src/includes/db/Database.php:1131
Stack trace:
#0 /mnt/jenkins-workspace/workspace/mwext-Wikibase-qunit/src/includes/db/Database.php(1086): DatabaseBase->reportQueryError('database is loc...', 5, 'INSERT OR IGNOR...', 'MessageBlobStor...', false)
#1 /mnt/jenkins-workspace/workspace/mwext-Wikibase-qunit/src/includes/db/Database.php(1973): DatabaseBase->query('INSERT OR IGNOR...', 'MessageBlobStor...')
#2 /mnt/jenkins-workspace/workspace/mwext-Wikibase-qunit/src/includes/db/DatabaseSqlite.php(624): DatabaseBase->insert('msg_resource', Array, 'MessageBlobStor...', Array)
#3 /mnt/jenkins-workspace/workspace/mwext-Wikibase-qunit/src/includes/cache/MessageBlobStore.php(132): DatabaseSqlite->insert('msg_resource', Array, 'MessageBlobStor...', Array)
#4 /mnt/jenkins-workspace/workspace/mwext-Wikibase-qunit/src/includes/cache/MessageBlobStore.php(89): MessageBlobStore->insertMessageBlob('jquery.ui.core....', Object(ResourceLoaderFileModule), 'en')
#5 /mnt/jenkins-workspace/workspace/mwext-Wikibase-qunit/src/includes/resourceloader/ResourceLoader.php(985): MessageBlobStore->get(Object(ResourceLoader), Array, 'en')
#6 /mnt/jenkins-workspace/workspace/mwext-Wikibase-qunit/src/includes/resourceloader/ResourceLoader.php(723): ResourceLoader->makeModuleResponse(Object(ResourceLoaderContext), Array, Array)
#7 /mnt/jenkins-workspace/workspace/mwext-Wikibase-qunit/src/load.php(47): ResourceLoader->respond(Object(ResourceLoaderContext))
#8 {main}