SharePoint Best Practices
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  • SharePoint Best Practices Library by SPDocKit
  • Configuration
    • App Configuration
      • App Services Configured
      • Apps Configured
    • Distributed Cache
      • Appfabric Patched
      • Cache Cluster State
      • Cache Running
      • SharePoint Distributed Cache Size 2013
      • Distributed Cache Collocation Compliance
    • Security
      • Farm Account is not Local Admin
      • Office Web Apps HTTPS
    • Solutions
      • Solution Assembly Deployment Valid
    • Servers
      • Expired Certificates
      • Loopback Disabled
      • Minrole Compliance
  • Databases
    • ModelDB
      • ModelDB Files Autogrowth
      • ModelDB Files Initial Size
      • ModelDB Recovery Model
    • TempDB
      • TempDB Files
      • TempDB Files Configuration
      • TempDB Recovery Model
      • TempDB Response Times
      • TempDB Size
    • Content Database Autogrowth
    • Content Database Capacity
    • Database Files
    • Disk Allocation Size
    • Max Degree of Parallelism
    • SQL Alias
    • SQL Server Memory – SQL Server Memory Allocation Best Practices
  • Hardware Requirements
    • Free Disk Space
    • SharePoint 2013 Server and Hardware Requirements
  • Maintenance
    • Backup
      • Content Database Backups
      • Farm Backup Configured
      • Farm Backup History
    • Misc
      • Farm Accounts Used Interactively
      • PDF iFilter Installed
      • Upgrade Ready
  • Monitoring and Logging
    • Diagnostic Log Path
    • Enable Usage and Health Data Collection
    • SharePoint IIS Log Path
    • Restrict Trace Log Disk Space Usage
    • Search Index Path
    • ULS Active
    • Usage and Health Log Path
    • Verbose Logging Enabled
  • Service Applications
    • Search
      • Crawl Account Search Permission
      • Incremental Search Configuration
      • PDF Extension Added to Search Application
      • Search Content Sources
      • Search Running
    • UPA
      • My Site Configured
      • UPA Up and Running
    • Web Analytics
      • Event Collection Configured
      • Web Analytics Services Started
    • Application Proxies
    • Authentication Providers
    • Exchange Task Sync
    • Multiple Service Applications
    • Sandboxed Code Service
    • SharePoint 2013 Secure Store Service Configured
    • State Service
  • SharePoint Software Boundaries and Limits
    • SharePoint Software Boundaries and Limits Overview
    • Limits by Feature
      • Search Limits
        • Authoritative Pages
        • Content Sources
        • Crawl Components
        • Crawl Databases
        • Crawl Rules
        • Index Partitions
        • Managed Properties
        • Property Databases
        • Scope Rules Count per Search Service Application
        • Scope Rules Count per Search Scope
        • Search Topology Limits
        • Sharepoint Search Service Applications
        • Start Addresses
      • User Profile Limits
        • User Profile Count
      • Visio Services Limits
        • File Size of Visio Web Drawings – Max Web Drawing Size
        • Visio Services Cache Age
        • Visio Web Drawing Recalculation Time-out
      • Word Automation Services
        • Conversion Job Size
        • Conversion Start Frequency
    • Limits by Hierarchy
      • Content Database Limits
        • Content Database Size
        • Number of Content Databases
        • Site Collections per Content Database
      • Server Limits
        • Number of Application Pools
      • Site Collection Limits
        • Number of Site Collections
        • Site Collection Size
        • Web Site
      • Web Application Limits
        • Content Databases
        • Managed Paths
        • Number of Web Applications
        • Site Collections
  • Site Collection Health
    • Farm Features Duplicate IDs
    • Features Duplicate IDs
    • SharePoint Site Collection Upgrade – Upgrade SharePoint 2010 to 2013
    • Site Collections Duplicate IDs
    • Web Application Features Duplicate IDs
  • Updates
    • SharePoint
      • Build Revoked
      • Farm in Trial
      • Is SharePoint Up to Date
      • SharePoint 2013 Language Packs Up to Date
      • Office Web Apps Up to Date - Office Web App Servers
      • Product Supported
    • Servers
      • Sharepoint Server Upgrade Required
      • Windows Updates
      • Hotfixes per Server Role
        • Application Servers Hotfixes
        • DB Servers Hotfixes
        • Distributed Cache Servers Hotfixes
        • Failover Servers Hotfixes
        • Search Servers Hotfixes
        • WFE Servers Hotfixes
  • Web Applications
    • Caching
      • BLOB Caching Enabled
      • Object Cache User Accounts
      • Publishing Cache
    • AppPool User in Performance Log Group
    • Batch Compilation Disabled
    • Web Application in Debug Mode - Web.config Debugging How To
    • Web Application URL Check
    • Web Applications Without Sites
    • SharePoint Web.config Files Equality
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  • Issue description
  • Explanation
  • Solution
  • Additional information

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  1. Site Collection Health

Site Collections Duplicate IDs

Site Collection Duplicate IDs best practices report by SPDocKit determines whether there are site collections in the content database with duplicate IDs.

PreviousSharePoint Site Collection Upgrade – Upgrade SharePoint 2010 to 2013NextWeb Application Features Duplicate IDs

Last updated 1 year ago

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Issue description

This check determines whether there are site collections in the content database with duplicate IDs. This can result in orphaned objects and improper SharePoint functionality, or break third-party code that relies on unique IDs.

Explanation

Each site collection in a SharePoint farm has a unique identifier (ID). SharePoint uses these IDs to find the information that defines the site collection itself. As an example, SharePoint uses this information internally to determine which subsites, lists, documents or other information fragments within the content database belong to a particular site collection. Also, third-party code may use these IDs to identify site collections and perform the operations they were designed for. Therefore, it is very important that site collection IDs are unique.

SharePoint uses globally unique identifiers (GUIDs) as the site collection IDs. Due to their nature and the mechanisms for using them, it is impossible for SharePoint to generate and assign the same ID to two or more site collections. However, in some scenarios this can occur. One example is when an unsuccessful restore of a site collection is followed by a successful restore. Also, faulty third-party code could create duplicate IDs.

Solution

Make sure that there are no site collections in the SharePoint farm that share the same ID. Remove site collections with a duplicate ID and recreate them.

Additional information

Additional information can be found in the following TechNet articles:

Restore site collection within the same farm: SharePoint 2010
Copy-SPSite
Finding Duplicate GUIDs in Your SharePoint Site Collection
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