Today I upgraded a site from 7.2.2 to 7.2.8 hosted on Azure and I'm not getting the following error when Umbraco tries to update the Examine indexes.

Provider=VenueIndexer, NodeId=-1
System.Exception: Error indexing queue items,Lucene.Net.Store.LockObtainFailedException: Lock obtain timed out: NativeFSLock@D:\home\site\wwwroot\App_Data\TEMP\ExamineIndexes\Special\Index\write.lock: System.IO.IOException: The process cannot access the file 'D:\home\site\wwwroot\App_Data\TEMP\ExamineIndexes\Special\Index\write.lock' 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)
   at Lucene.Net.Store.NativeFSLock.Obtain() ---> System.IO.IOException: The process cannot access the file 'D:\home\site\wwwroot\App_Data\TEMP\ExamineIndexes\Special\Index\write.lock' 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)
   at Lucene.Net.Store.NativeFSLock.Obtain()
   --- End of inner exception stack trace ---
   at Lucene.Net.Store.Lock.Obtain(Int64 lockWaitTimeout)
   at Lucene.Net.Index.IndexWriter.Init(Directory d, Analyzer a, Boolean create, Boolean closeDir, IndexDeletionPolicy deletionPolicy, Boolean autoCommit, Int32 maxFieldLength, IndexingChain indexingChain, IndexCommit commit)
   at Lucene.Net.Index.IndexWriter.Init(Directory d, Analyzer a, Boolean closeDir, IndexDeletionPolicy deletionPolicy, Boolean autoCommit, Int32 maxFieldLength, IndexingChain indexingChain, IndexCommit commit)
   at Lucene.Net.Index.IndexWriter..ctor(Directory d, Analyzer a, MaxFieldLength mfl)
   at Examine.DataServices.RegisterEvents.SearchIndexerUpdateSpecials(Object sender, IndexingNodeDataEventArgs e)
   at System.EventHandler`1.Invoke(Object sender, TEventArgs e)
   at UmbracoExamine.UmbracoContentIndexer.OnGatheringNodeData(IndexingNodeDataEventArgs e)
   at Examine.LuceneEngine.Providers.LuceneIndexer.GetDataToIndex(XElement node, String type)
   at Examine.LuceneEngine.Providers.LuceneIndexer.ProcessIndexQueueItem(IndexOperation op, IndexWriter writer)
   at Examine.LuceneEngine.Providers.LuceneIndexer.ProcessQueueItem(IndexOperation item, ICollection`1 indexedNodes, IndexWriter writer)
   at Examine.LuceneEngine.Providers.LuceneIndexer.ForceProcessQueueItems(Boolean block), IndexSet: VenueIndexSet

I've disabled async (runAsync=false), and a few of the indexes update correctly, but this one doesn't. Any advice/help??

Cheers, Karl