Hello
I am currently working on the upgrade of Jira ( 5.2.5 to 6.1.4) on a production server ( OS : Linux)
Before doing this upgrade on the production server, I perform tests downgrade on a test server ( OS : Linux)( 6.1.4 to 5.2.5)
On the test server, I succeeded to switch from 6.1.4 to 5.2.5 by replacing the jira_6_1_4 webapps \ folder webapps \ jira_5_2_5
I unzipped the war file . which was in the tomcat6 folder and I replaced those that were in the folder jira_home
So far, the page jira works with the old version 5.2.5
but once when I integrated the plugin Greenhopper ( 6.1.2) I have a yellow bar that appears at the top of my window with the following message :
<< GreenHopper is currently unavailable . This might be an upgrade task Because Has Failed to run or not not yet completed HAS .
Please contact your system administrator if you continue to see this message. >>
also
java.lang.RuntimeException: java.util.concurrent.ExecutionException: com.atlassian.jira.util.dbc.Assertions$NullArgumentException: s1 should not be null!
at com.atlassian.jira.index.FutureResult.await(FutureResult.java:35)
at com.atlassian.jira.index.CompositeResultBuilder$CompositeResult.await(CompositeResultBuilder.java:82)
at com.atlassian.jira.issue.index.DefaultIndexManager.doIndexIssuesInBatchMode(DefaultIndexManager.java:855)
at com.atlassian.jira.issue.index.DefaultIndexManager.doStopTheWorldReindex(DefaultIndexManager.java:825)
at com.atlassian.jira.issue.index.DefaultIndexManager.reIndexAll(DefaultIndexManager.java:335)
at com.atlassian.jira.issue.index.DefaultIndexManager.reIndexAll(DefaultIndexManager.java:301)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.atlassian.util.profiling.object.ObjectProfiler.profiledInvoke(ObjectProfiler.java:81)
at com.atlassian.jira.config.component.SwitchingInvocationHandler.invoke(SwitchingInvocationHandler.java:28)
at $Proxy157.reIndexAll(Unknown Source)
at com.atlassian.jira.util.index.CompositeIndexLifecycleManager.reIndexAll(CompositeIndexLifecycleManager.java:54)
at com.atlassian.jira.web.action.admin.index.ReIndexAsyncIndexerCommand.doReindex(ReIndexAsyncIndexerCommand.java:28)
at com.atlassian.jira.web.action.admin.index.AbstractAsyncIndexerCommand.call(AbstractAsyncIndexerCommand.java:54)
at com.atlassian.jira.web.action.admin.index.ReIndexAsyncIndexerCommand.call(ReIndexAsyncIndexerCommand.java:16)
at com.atlassian.jira.web.action.admin.index.AbstractAsyncIndexerCommand.call(AbstractAsyncIndexerCommand.java:23)
at com.atlassian.jira.task.TaskManagerImpl$TaskCallableDecorator.call(TaskManagerImpl.java:366)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at com.atlassian.multitenant.impl.DefaultMultiTenantManager.runForTenant(DefaultMultiTenantManager.java:61)
at com.atlassian.multitenant.juc.MultiTenantExecutors$WrappedRunnable.run(MultiTenantExecutors.java:160)
at com.atlassian.jira.task.ForkedThreadExecutor$ForkedRunnableDecorator.run(ForkedThreadExecutor.java:249)
at java.lang.Thread.run(Thread.java:662)
Caused by: java.util.concurrent.ExecutionException: com.atlassian.jira.util.dbc.Assertions$NullArgumentException: s1 should not be null!
at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222)
at java.util.concurrent.FutureTask.get(FutureTask.java:83)
at com.atlassian.jira.index.FutureResult.await(FutureResult.java:31)
... 27 more
Caused by: com.atlassian.jira.util.dbc.Assertions$NullArgumentException: s1 should not be null!
at com.atlassian.jira.util.dbc.Assertions.notNull(Assertions.java:28)
at com.atlassian.jira.util.CaseFolding.foldString(CaseFolding.java:64)
at com.atlassian.jira.util.CaseFolding.foldString(CaseFolding.java:30)
at com.atlassian.greenhopper.customfield.epiclink.EpicLinkCustomFieldIndexer.getKeyFoldedValue(EpicLinkCustomFieldIndexer.java:124)
at com.atlassian.greenhopper.customfield.epiclink.EpicLinkCustomFieldIndexer.addIndex(EpicLinkCustomFieldIndexer.java:57)
at com.atlassian.jira.issue.index.IssueDocument.getDocument(IssueDocument.java:40)
at com.atlassian.jira.issue.index.DefaultIssueDocumentFactory.get(DefaultIssueDocumentFactory.java:15)
at com.atlassian.jira.issue.index.DefaultIssueDocumentFactory.get(DefaultIssueDocumentFactory.java:11)
at com.atlassian.jira.issue.index.DefaultIssueIndexer$IssueLockDocumentCreationStrategy$2.get(DefaultIssueIndexer.java:598)
at com.atlassian.jira.issue.index.DefaultIssueIndexer$IssueLockDocumentCreationStrategy$2.get(DefaultIssueIndexer.java:593)
at com.atlassian.util.concurrent.ManagedLocks$ManagedLockImpl.withLock(ManagedLocks.java:315)
at com.atlassian.jira.issue.index.DefaultIssueIndexer$IssueLockDocumentCreationStrategy.get(DefaultIssueIndexer.java:592)
at com.atlassian.jira.issue.index.DefaultIssueIndexer$IndexIssuesOperation.perform(DefaultIssueIndexer.java:446)
at com.atlassian.jira.issue.index.DefaultIssueIndexer$4$1.get(DefaultIssueIndexer.java:284)
at com.atlassian.jira.issue.index.DefaultIssueIndexer$4$1.get(DefaultIssueIndexer.java:280)
at com.atlassian.jira.index.SimpleIndexingStrategy.get(SimpleIndexingStrategy.java:9)
at com.atlassian.jira.index.SimpleIndexingStrategy.get(SimpleIndexingStrategy.java:5)
at com.atlassian.jira.index.MultiThreadedIndexingStrategy$1.call(MultiThreadedIndexingStrategy.java:38)
at com.atlassian.jira.index.MultiThreadedIndexingStrategy$1.call(MultiThreadedIndexingStrategy.java:35)
at com.atlassian.jira.util.concurrent.BoundedExecutor$2.call(BoundedExecutor.java:70)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at com.atlassian.multitenant.impl.DefaultMultiTenantManager.runForTenant(DefaultMultiTenantManager.java:61)
at com.atlassian.multitenant.juc.MultiTenantExecutors$WrappedRunnable.run(MultiTenantExecutors.java:160)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
... 1 more
I tried to do reindexaction , but nothing was done...
Could you please help me?
I'm lost 
thank you very much
