SSRS迁移后Web Service URL无法查看报表：数据验证失败

Alright, let's dig into this SSRS migration problem you're facing. The error logs you shared point straight to an ASP.NET MachineKey mismatch—this is super common when moving SSRS from an older version to a newer one, especially between 2008 and 2014. Here's how to fix it:

First, let's confirm the root cause from your logs:

library!ReportServer_0-2!f3c!05/19/2019-10:36:56:: e ERROR: Error rending control: System.Web.HttpException: Unable to validate data. 
at System.Web.Configuration.MachineKeySection.EncryptOrDecryptData(Boolean fEncrypt, Byte[] buf, Byte[] modifier, Int32 start, Int32 length, IVType ivType, Boolean useValidationSymAlgo, Boolean signData) 
at System.Web.UI.Page.EncryptStringWithIV(String s, IVType ivType) 
at System.Web.Handlers.ScriptResourceHandler.RuntimeScriptResourceHandler.GetScriptResourceUrlImpl(List`1 assemblyResourceLists, Boolean zip, Boolean notifyScriptLoaded)
...
library!ReportServer_0-2!f3c!05/19/2019-10:36:56:: e ERROR: Throwing Microsoft.ReportingServices.Diagnostics.Utilities.ReportServerHttpRuntimeException: The request has been aborted., Microsoft.ReportingServices.Diagnostics.Utilities.ReportServerHttpRuntimeException: An error occurred in the HTTP Runtime object for application domain ReportServer_MSSQLSERVER_0-2-132027317822865767. Most likely, the HTTP request contains an unsupported verb or invalid syntax. ---> System.Web.HttpException: Unable to validate data.
...

The Unable to validate data error happens when ASP.NET can't decrypt/validate encrypted strings (like script resource URLs) because the MachineKey used for encryption doesn't match between the old and new server. SSRS 2008 and 2014 rely on different default ASP.NET environments, and even if they used the same, auto-generated MachineKeys on each server are unique.

Fix Steps: #

1. Sync MachineKey Between Old and New Server

• On your old SQL 2008 server, navigate to the ReportServer web.config file (typically at C:\Program Files\Microsoft SQL Server\MSRS10.MSSQLSERVER\Reporting Services\ReportServer\web.config)
• Look for the <machineKey> element. If it exists, copy its validationKey, decryptionKey, validation, and decryption attributes. If it doesn't exist, the old server used auto-generated keys—generate a new consistent key pair (use a trusted MachineKey generator) to use on both servers
• On your new SQL 2014 server, update both the ReportServer and Reports web.config files (paths like C:\Program Files\Microsoft SQL Server\MSRS12.MSSQLSERVER\Reporting Services\ReportServer\web.config and ...\Reports\web.config) with the same <machineKey> configuration. Place it inside the <system.web> section:

  <machineKey validationKey="YOUR_UNIQUE_VALIDATION_KEY" 
              decryptionKey="YOUR_UNIQUE_DECRYPTION_KEY" 
              validation="SHA1" 
              decryption="AES" />
  

2. Verify Application Pool Configuration

• Open IIS Manager on the new server, check the application pools for ReportServer and Reports:
  • Ensure they're using .NET CLR Version v4.0.30319 (SSRS 2014 requires ASP.NET 4.x)
  • Set the pipeline mode to Integrated
  • Confirm the application pool identity has read access to the SSRS report directories and web.config files

3. Clear ASP.NET Temporary Cache

Old compiled ASP.NET files can cause lingering validation issues. Stop the ReportServer and Reports application pools, then delete the contents of:
C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\reportserver
and
C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\reports
Restart the application pools after clearing these.

4. Validate SSRS URL Bindings

Even though HTTP has the same issue, double-check in the SSRS Configuration Manager that the Report Server Web Service URL bindings (both HTTP and HTTPS) are correctly set—no duplicate ports, host headers are consistent, and if using HTTPS, the SSL certificate is properly assigned and trusted.

Once you've completed these steps, test the Report Server Web Service URL again. The MachineKey sync should resolve the validation error, allowing reports to render just like they do through the Reports portal.

内容的提问来源于stack exchange，提问作者SkipFeeney