crashing during Reindexing

Hi,

I did a migration from CSV file after that I tried to reindex the system. But the system get crashed and getting the following messages

java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.NullPointerException
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.reIndexAll(DefaultIndexManager.java:243)
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 $Proxy119.reIndexAll(Unknown Source)
at com.atlassian.jira.util.index.IndexLifecycleManager$Composite.reIndexAll(IndexLifecycleManager.java:112)
at com.atlassian.jira.web.action.admin.index.ReIndexAsyncIndexerCommand.doReindex(ReIndexAsyncIndexerCommand.java:29)
at com.atlassian.jira.web.action.admin.index.AbstractAsyncIndexerCommand.call(AbstractAsyncIndexerCommand.java:54)
at com.atlassian.jira.web.action.admin.index.AbstractAsyncIndexerCommand.call(AbstractAsyncIndexerCommand.java:23)
at com.atlassian.jira.task.TaskManagerImpl$TaskCallableDecorator.call(TaskManagerImpl.java:359)
at java.util.concurrent.FutureTask$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: java.lang.NullPointerException
at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222)
at java.util.concurrent.FutureTask.get(FutureTask.java:83)
at com.atlassian.jira.index.FutureResult.await(FutureResult.java:31)
... 23 more
Caused by: java.lang.NullPointerException
at java.util.ArrayList.addAll(ArrayList.java:472)
at com.atlassian.jira.issue.index.DefaultChangeHistoryRetriever.filterChangeItems(DefaultChangeHistoryRetriever.java:120)
at com.atlassian.jira.issue.index.DefaultChangeHistoryRetriever.createChangeGroupsFromChangeItems(DefaultChangeHistoryRetriever.java:61)
at com.atlassian.jira.issue.index.DefaultChangeHistoryRetriever.get(DefaultChangeHistoryRetriever.java:54)
at com.atlassian.jira.issue.index.DefaultChangeHistoryRetriever.get(DefaultChangeHistoryRetriever.java:30)
at com.atlassian.jira.issue.index.DefaultIssueIndexer$ChangeHistoryDocumentBuilder.get(DefaultIssueIndexer.java:480)
at com.atlassian.jira.issue.index.DefaultIssueIndexer$IssueLockDocumentCreationStrategy$2.get(DefaultIssueIndexer.java:512)
at com.atlassian.jira.issue.index.DefaultIssueIndexer$IssueLockDocumentCreationStrategy$2.get(DefaultIssueIndexer.java:509)
at com.atlassian.util.concurrent.ManagedLocks$ManagedLockImpl.withLock(ManagedLocks.java:315)
at com.atlassian.jira.issue.index.DefaultIssueIndexer$IssueLockDocumentCreationStrategy.get(DefaultIssueIndexer.java:508)
at com.atlassian.jira.issue.index.DefaultIssueIndexer$IssueLockDocumentCreationStrategy.get(DefaultIssueIndexer.java:496)
at com.atlassian.jira.issue.index.DefaultIssueIndexer$IndexIssuesOperation.perform(DefaultIssueIndexer.java:371)
at com.atlassian.jira.issue.index.DefaultIssueIndexer$4$1.get(DefaultIssueIndexer.java:255)
at com.atlassian.jira.issue.index.DefaultIssueIndexer$4$1.get(DefaultIssueIndexer.java:251)
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:39)
at com.atlassian.jira.index.MultiThreadedIndexingStrategy$1.call(MultiThreadedIndexingStrategy.java:36)
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

Please help me to resolve the issue.