Hi,

I see below exception in ULS logs on my SharePoint 2013 Farm , and because of it I am unable to start any timer jobs , Have tried to recreate cache and restart timer job but in vain , have also rebooted servers but no luck , does anyone know how to fix this issue ?

Level : Unexpected , Category : Administration , Process : OWSTimer.EXE , Area : SharePoint Server Search

An error occurred during topology synchronize. Exception : System.ArgumentException: Item has already been added. Key in dictionary: 'SiteCollectionsCacheDBb1947b25-6005-47a3-8c81-5edeffededb6'  Key being added: 'SiteCollectionsCacheDBb1947b25-6005-47a3-8c81-5edeffededb6'     at System.Collections.Hashtable.Insert(Object key, Object nvalue, Boolean add)     at Microsoft.SharePoint.Administration.SPAutoSerializingObject.DeserializeBasicObject(XmlElement xmlValue, Boolean isMerge, Boolean bResolveMissingTypes)     at Microsoft.SharePoint.Administration.SPAutoSerializingObject.SetStateXml(XmlNodeList childNodes, Boolean isMerge, Boolean bResolveMissingTypes)     at Microsoft.SharePoint.Administration.SPAutoSerializingObject.SetStateXml(XmlDocument value, Boolean bResolveMissingTypes)     at Microsoft.SharePoint.Administration.SPPersistedObject.Initialize(ISPPersistedStoreProvider persistedStoreProvider, Guid id, Guid parentId, String name, SPObjectStatus status, Int64 version, XmlDocument state)     at Microsoft.SharePoint.Administration.SPConfigurationDatabase.GetObject(Guid id, Guid parentId, Guid type, String name, SPObjectStatus status, Byte[] versionBuffer, String xml)     at Microsoft.SharePoint.Administration.SPConfigurationDatabase.GetObject(SqlDataReader dr)     at Microsoft.SharePoint.Administration.SPConfigurationDatabase.RefreshCache(Int64 currentVersionOverride, List`1& newObjects, List`1& deletedObjects, Int64& newestObjectVersion)     at Microsoft.SharePoint.Administration.SPConfigurationDatabase.RefreshCache()     at Microsoft.SharePoint.Administration.SPConfigurationDatabase.StoreObject(SPPersistedObject obj, Boolean storeClassIfNecessary, Boolean ensure)     at Microsoft.SharePoint.Administration.SPPersistedObject.BaseUpdate()     at Microsoft.Office.Server.Search.Administration.Topology.IndexTopologyHandler.RedistributeData(SearchTopology previousTopology, SearchTopology newTopology)     at Microsoft.Office.Server.Search.Administration.Topology.SearchTopology.ActivateComponentsInner(SearchTopology previousTopology)     at Microsoft.Office.Server.Search.Administration.Topology.SearchTopology.<>c__DisplayClassa.<ActivateComponents>

Hi ,

Before this exception there is below entry :

Hi,

We are currently looking into this issue and will give you an update as soon as possible.
 
Thank you for your understanding and support.

Best Regards,

Lisa Chen

Thanks Lisa for your reply.

I also found that , SharePoint config database contains duplicate entry for this ID "b1947b25-6005-47a3-8c81-5edeffededb6' (found through powershell)  and there is no way to remove it as its part of a xml string and I cannot find any such column in any of the tables in sql.

Hi Lisa,

Any update on this issue ?

Hi Lisa,

Any update ?

Hello praggy,

Please run the Configuration Wizard first to check if the wizard will work normally.

If the Wizard fails to complete, please post a screenshot, check the Windows Event log if there is any error related to our issue.

For your reference: Psconfig failure with error - An item with the same key has already been added:

http://blogs.msdn.com/b/biyengar/archive/2009/10/27/psconfig-failure-with-error-an-item-with-the-same-key-has-already-been-added.aspx

Thanks for your time.

Best Regards,

Lisa Chen