UnsupportedOperationException when upgrading 6.1 GA3 > 6.2 with documents stored on JCR through DDL

• Type: Bug
• Status: Closed
• Resolution: Won't Fix
• Affects Version/s: 6.2.X EE
• Fix Version/s: None
• Component/s: DM > Upgrade, Documents & Media, Dynamic Data Mapping > Upgrades
• Labels: None
• Fix Priority: 3
• Git Pull Request: https://github.com/dsanz/liferay-portal-ee/pull/15

Reproduction steps:
1) In a 6.1 portal Set dl.store.impl=com.liferay.portlet.documentlibrary.store.JCRStore in portal-ext.properties
2) Start the portal, add a Data Definition having a field for File Upload
3) Add a Dynamic Data List with such Data Definition and a Record with 1 uploaded file, assert the file displays well
4) Shut down the portal
5) Upgrade to 6.2 EE portal-107 having the same DB and portal-ext.properties, make sure to add passwords.encryption.algorithm.legacy=SHA, start the upgrade
6) During upgrade, the below will appear in the logs:

11:07:58,326 WARN  [localhost-startStop-1][VerifyDynamicDataMapping:164] Unable to add file entry Flag_of_Faroe_Islands.png
java.lang.UnsupportedOperationException
	at com.liferay.portlet.documentlibrary.store.BaseStore.getFile(BaseStore.java:291)
	at com.liferay.portlet.documentlibrary.store.BaseStore.getFile(BaseStore.java:257)
	at com.liferay.portlet.documentlibrary.store.StoreProxyImpl.getFile(StoreProxyImpl.java:124)
	at com.liferay.portlet.documentlibrary.store.SafeFileNameStoreWrapper.getFile(SafeFileNameStoreWrapper.java:196)
	at com.liferay.portlet.documentlibrary.store.DLStoreImpl.getFile(DLStoreImpl.java:246)
	at com.liferay.portlet.documentlibrary.store.DLStoreUtil.getFile(DLStoreUtil.java:326)
	at com.liferay.portal.verify.VerifyDynamicDataMapping.addFileEntry(VerifyDynamicDataMapping.java:149)
	at com.liferay.portal.verify.VerifyDynamicDataMapping.updateFileUploadReferences(VerifyDynamicDataMapping.java:594)
	at com.liferay.portal.verify.VerifyDynamicDataMapping.updateDDLFileUploadReferences(VerifyDynamicDataMapping.java:484)
	at com.liferay.portal.verify.VerifyDynamicDataMapping.updateFileUploadReferences(VerifyDynamicDataMapping.java:557)
	at com.liferay.portal.verify.VerifyDynamicDataMapping.updateFileUploadReferences(VerifyDynamicDataMapping.java:538)
	at com.liferay.portal.verify.VerifyDynamicDataMapping.verifyStructure(VerifyDynamicDataMapping.java:739)
	at com.liferay.portal.verify.VerifyDynamicDataMapping.doVerify(VerifyDynamicDataMapping.java:301)
	at com.liferay.portal.verify.VerifyProcess.verify(VerifyProcess.java:68)
	at com.liferay.portal.verify.VerifyProcess.verify(VerifyProcess.java:76)
	at com.liferay.portal.verify.VerifyProcessSuite.doVerify(VerifyProcessSuite.java:44)
	at com.liferay.portal.verify.VerifyProcess.verify(VerifyProcess.java:68)
	at com.liferay.portal.verify.VerifyProcessUtil._verifyProcess(VerifyProcessUtil.java:111)
	at com.liferay.portal.verify.VerifyProcessUtil._verifyProcess(VerifyProcessUtil.java:76)
	at com.liferay.portal.verify.VerifyProcessUtil.verifyProcess(VerifyProcessUtil.java:46)
	at com.liferay.portal.events.StartupHelper.verifyProcess(StartupHelper.java:146)
	at com.liferay.portal.events.StartupHelperUtil.verifyProcess(StartupHelperUtil.java:67)
	at com.liferay.portal.tools.DBUpgrader.verify(DBUpgrader.java:240)
	at com.liferay.portal.events.StartupAction.doRun(StartupAction.java:239)
	at com.liferay.portal.ee.license.StartupAction.doRun(Unknown Source)
	at com.liferay.portal.events.StartupAction.run(StartupAction.java:77)
	at com.liferay.portal.servlet.MainServlet.processStartupEvents(MainServlet.java:1257)
	at com.liferay.portal.servlet.MainServlet.init(MainServlet.java:231)
	at javax.servlet.GenericServlet.init(GenericServlet.java:160)
	at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1280)
	at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1193)
	at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1088)
	at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5176)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5460)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
	at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:656)
	at org.apache.catalina.startup.HostConfig$DeployDescriptor.run(HostConfig.java:1635)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)

Portal will start up

7) Login with Admin user, check the previously created DDL record

Expected: The file to be present
Actual behavior The uploaded file disappeared