Exception thrown during upgrade: com.atlassian.jira.issue.index.IndexException: java.util.concurrent.ExecutionException: java.io.IOException: background merge hit exception: _4:c1 _5:c1 _6:c1 into _7 [optimize]
java.lang.RuntimeException: com.atlassian.jira.issue.index.IndexException: java.util.concurrent.ExecutionException: java.io.IOException: background merge hit exception: _4:c1 _5:c1 _6:c1 into _7 [optimize]
	at com.atlassian.jira.issue.index.DefaultIndexManager.optimize0(DefaultIndexManager.java:413)
	at com.atlassian.jira.issue.index.DefaultIndexManager.reIndexAll(DefaultIndexManager.java:230)
	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:585)
	at com.atlassian.util.profiling.object.ObjectProfiler.profiledInvoke(ObjectProfiler.java:71)
	at com.atlassian.jira.config.component.SwitchingInvocationHandler.invoke(SwitchingInvocationHandler.java:28)
	at $Proxy4.reIndexAll(Unknown Source)
	at com.atlassian.jira.util.index.IndexLifecycleManager$Composite.reIndexAll(IndexLifecycleManager.java:112)
	at com.atlassian.jira.upgrade.tasks.AbstractReindexUpgradeTask.doUpgrade(AbstractReindexUpgradeTask.java:44)
	at com.atlassian.jira.upgrade.UpgradeManagerImpl.doUpgradeTaskSucess(UpgradeManagerImpl.java:680)
	at com.atlassian.jira.upgrade.UpgradeManagerImpl.runUpgradeTasks(UpgradeManagerImpl.java:576)
	at com.atlassian.jira.upgrade.UpgradeManagerImpl.doUpgrade(UpgradeManagerImpl.java:402)
	at com.atlassian.jira.upgrade.UpgradeManagerImpl.doUpgradeIfNeeded(UpgradeManagerImpl.java:350)
	at com.atlassian.jira.upgrade.UpgradeManagerImpl.doUpgradeIfNeededAndAllowed(UpgradeManagerImpl.java:310)
	at com.atlassian.jira.action.admin.DataImport.doExecute(DataImport.java:224)
	at webwork.action.ActionSupport.execute(ActionSupport.java:153)
	at com.atlassian.jira.action.JiraActionSupport.execute(JiraActionSupport.java:54)
	at com.atlassian.jira.action.JiraNonWebActionSupport.execute(JiraNonWebActionSupport.java:27)
	at webwork.dispatcher.GenericDispatcher.executeAction(GenericDispatcher.java:132)
	at com.atlassian.core.action.DefaultActionDispatcher.execute(DefaultActionDispatcher.java:36)
	at com.atlassian.jira.web.action.util.ImportAll.doExecute(ImportAll.java:56)
	at webwork.action.ActionSupport.execute(ActionSupport.java:153)
	at com.atlassian.jira.action.JiraActionSupport.execute(JiraActionSupport.java:54)
	at webwork.dispatcher.GenericDispatcher.executeAction(GenericDispatcher.java:132)
	at com.atlassian.jira.web.dispatcher.JiraServletDispatcher.service(JiraServletDispatcher.java:178)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at com.atlassian.jira.web.filters.AccessLogFilter.doFilter(AccessLogFilter.java:73)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:119)
	at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:55)
	at com.atlassian.jira.web.filters.SitemeshExcludePathFilter.doFilter(SitemeshExcludePathFilter.java:38)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at com.atlassian.seraph.filter.SecurityFilter.doFilter(SecurityFilter.java:192)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at com.atlassian.seraph.filter.TrustedApplicationsFilter.doFilter(TrustedApplicationsFilter.java:120)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at com.atlassian.seraph.filter.BaseLoginFilter.doFilter(BaseLoginFilter.java:125)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at com.atlassian.util.profiling.filters.ProfilingFilter.doFilter(ProfilingFilter.java:132)
	at com.atlassian.jira.web.filters.JIRAProfilingFilter.doFilter(JIRAProfilingFilter.java:16)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at com.atlassian.jira.web.filters.ActionCleanupDelayFilter.doFilter(ActionCleanupDelayFilter.java:43)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at com.atlassian.jira.web.filters.RequestCleanupFilter.doFilter(RequestCleanupFilter.java:50)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at com.atlassian.johnson.filters.AbstractJohnsonFilter.doFilter(AbstractJohnsonFilter.java:72)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:350)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at com.atlassian.gzipfilter.GzipFilter.doFilter(GzipFilter.java:79)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at com.atlassian.core.filters.AbstractEncodingFilter.doFilter(AbstractEncodingFilter.java:33)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at com.atlassian.jira.appconsistency.db.DatabaseCompatibilityEnforcerFilter.doFilter(DatabaseCompatibilityEnforcerFilter.java:39)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:868)
	at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:663)
	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
	at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
	at java.lang.Thread.run(Thread.java:595)
Caused by: com.atlassian.jira.issue.index.IndexException: java.util.concurrent.ExecutionException: java.io.IOException: background merge hit exception: _4:c1 _5:c1 _6:c1 into _7 [optimize]
	at com.atlassian.jira.issue.index.DefaultIndexManager.await(DefaultIndexManager.java:455)
	at com.atlassian.jira.issue.index.DefaultIndexManager.optimize0(DefaultIndexManager.java:409)
	... 83 more
Caused by: java.util.concurrent.ExecutionException: java.io.IOException: background merge hit exception: _4:c1 _5:c1 _6:c1 into _7 [optimize]
	at com.atlassian.jira.index.DefaultIndex$Failure.(DefaultIndex.java:151)
	at com.atlassian.jira.index.DefaultIndex$4.get(DefaultIndex.java:106)
	at com.atlassian.jira.index.DefaultIndex$4.get(DefaultIndex.java:97)
	at com.atlassian.jira.index.DefaultIndexActor.write(DefaultIndexActor.java:53)
	at com.atlassian.jira.index.DefaultIndex.optimize(DefaultIndex.java:95)
	at com.atlassian.jira.index.QueuedIndex$4.call(QueuedIndex.java:73)
	at com.atlassian.jira.index.QueuedIndex$4.call(QueuedIndex.java:71)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:269)
	at java.util.concurrent.FutureTask.run(FutureTask.java:123)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
	... 1 more
Caused by: java.io.IOException: background merge hit exception: _4:c1 _5:c1 _6:c1 into _7 [optimize]
	at org.apache.lucene.index.IndexWriter.optimize(IndexWriter.java:1787)
	at org.apache.lucene.index.IndexWriter.optimize(IndexWriter.java:1727)
	at org.apache.lucene.index.IndexWriter.optimize(IndexWriter.java:1707)
	at com.atlassian.jira.index.WriterWrapper.optimize(WriterWrapper.java:86)
	at com.atlassian.jira.index.DefaultIndex$4.get(DefaultIndex.java:101)
	... 10 more
Caused by: java.io.IOException: Cannot overwrite: C:\temp\jira\indexes\issues\_7.cfs
	at org.apache.lucene.store.FSDirectory.createOutput(FSDirectory.java:433)
	at org.apache.lucene.index.CompoundFileWriter.close(CompoundFileWriter.java:150)
	at org.apache.lucene.index.SegmentMerger.createCompoundFile(SegmentMerger.java:194)
	at org.apache.lucene.index.IndexWriter.mergeMiddle(IndexWriter.java:3307)
	at org.apache.lucene.index.IndexWriter.merge(IndexWriter.java:2968)
	at org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:240)