After upgrading DNN site From DNN 7.3.2 to DNN 7.4.1, its Application pools getting automatically off afer some interval every time.

So, we restarted the application pool and recycled again to web site works.

And in event logs, it shows some exceptions as below: 

2015-07-15 03:39:26,546 [EAPROPERTIES][Thread:5][ERROR] DotNetNuke.Services.Scheduling.SchedulerClient - System.IndexOutOfRangeException: Index was outside the bounds of the array.

at Lucene.Net.Util.BitVector.Get(Int32 bit)

at Lucene.Net.Index.SegmentTermDocs.ReadNoTf(Int32[] docs, Int32[] freqs, Int32 length)

at Lucene.Net.Index.SegmentTermDocs.Read(Int32[] docs, Int32[] freqs)

at Lucene.Net.Search.TermScorer.NextDoc()

at Lucene.Net.Search.ConstantScoreQuery.ConstantScorer.NextDoc()

at Lucene.Net.Search.ConjunctionScorer..ctor(Similarity similarity, Scorer[] scorers)

at Lucene.Net.Search.BooleanScorer2.CountingConjunctionSumScorer(List`1 requiredScorers)

at Lucene.Net.Search.BooleanScorer2.MakeCountingSumScorerSomeReq()

at Lucene.Net.Search.BooleanScorer2.MakeCountingSumScorer()

at Lucene.Net.Search.BooleanScorer2..ctor(Similarity similarity, Int32 minNrShouldMatch, List`1 required, List`1 prohibited, List`1 optional)

at Lucene.Net.Search.BooleanQuery.BooleanWeight.Scorer(IndexReader reader, Boolean scoreDocsInOrder, Boolean topScorer)

at Lucene.Net.Index.DocumentsWriter.ApplyDeletes(IndexReader reader, Int32 docIDStart)

at Lucene.Net.Index.DocumentsWriter.ApplyDeletes(SegmentInfos infos)

at Lucene.Net.Index.IndexWriter.ApplyDeletes()

at Lucene.Net.Index.IndexWriter.DoFlushInternal(Boolean flushDocStores, Boolean flushDeletes)

at Lucene.Net.Index.IndexWriter.DoFlush(Boolean flushDocStores, Boolean flushDeletes)

at Lucene.Net.Index.IndexWriter.PrepareCommit(IDictionary`2 commitUserData)

at Lucene.Net.Index.IndexWriter.Commit(IDictionary`2 commitUserData)

at DotNetNuke.Services.Search.Internals.LuceneControllerImpl.Commit()

at DotNetNuke.Services.Search.Internals.InternalSearchControllerImpl.Commit()

at DotNetNuke.Services.Search.SearchEngineScheduler.DoWork()

2015-07-15 07:01:01,342 [EAPROPERTIES][Thread:8][ERROR] DotNetNuke.Services.Exceptions.Exceptions - System.IO.IOException: The process cannot access the file 'C:\Dreamer\EdenAromata\Portal\Portals\4-System\Cache\Pages\1338_12501F292E5A603685E3125A20F9FDC5BC468018D1CD219CABAB93D3EFC7C5A9.data.resources' because it is being used by another process.

at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)

at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)

at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)

at System.IO.File.InternalWriteAllBytes(String path, Byte[] bytes, Boolean checkHost)

at System.IO.File.WriteAllBytes(String path, Byte[] bytes)

2015-07-15 15:04:04,771 [EAPROPERTIES][Thread:12][FATAL] DotNetNuke.Web.Common.Internal.DotNetNukeHttpApplication - System.Web.HttpException (0x80004005): The file '/Mining.aspx' does not exist.

at System.Web.UI.Util.CheckVirtualFileExists(VirtualPath virtualPath)

at System.Web.Compilation.BuildManager.GetVPathBuildResultInternal(VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate)

at System.Web.Compilation.BuildManager.GetVPathBuildResultWithNoAssert(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate)

at System.Web.Compilation.BuildManager.GetVirtualPathObjectFactory(VirtualPath virtualPath, HttpContext context, Boolean allowCrossApp, Boolean throwIfNotFound)

at System.Web.Compilation.BuildManager.CreateInstanceFromVirtualPath(VirtualPath virtualPath, Type requiredBaseType, HttpContext context, Boolean allowCrossApp)

at System.Web.UI.PageHandlerFactory.GetHandlerHelper(HttpContext context, String requestType, VirtualPath virtualPath, String physicalPath)

at System.Web.UI.PageHandlerFactory.GetHandler(HttpContext context, String requestType, String virtualPath, String path)

at System.Web.HttpApplication.MaterializeHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()

at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

We are not sure how to fix this application pool stops issue for this site finityasset.com. Please help me.

Thanks in advance.

Regards

Sri