SSRS Subscription fails with Protocol Violation (server committed protocol violation)

Question

Hi
we are facing issues with ssrs reports recently. Sometimes reports are delivered properly while most of the times they are not. Error message its showing in the ssrs web portal "Failure sending mail: One or more errors occurred.Mail will not be resent". When we check the error logs of the report it is throwing "Server committed protocol violation" error
In the event viewer its showing an error with "event ID 137" and source as report server PBIRS. Nothing has changed with the server or configuration.
Can someone help us to find the solution ASAP

Answer 1

Hi,

You need to add this line of code in your web.config inside <system.net> section under configuration section.

<system.net>
<settings>
<httpWebRequest useUnsafeHeaderParsing="true" />
</settings>
</system.net>

Answer 2

Hi @Chandrika Ramisetti ，

Server committed protocol violation

One of the most common cause of this error is the corrupt or missing headers in the request.
IIS checks if headers are complete in the request. If there is an issue with headers, it may reject the request.
The change in the requests and responses could be made by network devices in between the client and IIS server.

Please following these steps:

(1) Set UseUnsafeHeaderParsing value to “true” in web.config to ignore the header validation errors.

<system.net>      
<settings>          
<httpWebRequest useUnsafeHeaderParsing="true" />      
</settings>  
</system.net>  

(2) Set KeepAlive to “false” to prevent keeping the connection open which may solve the violation error

<configuration>     
<system.webServer>        
<httpProtocol allowKeepAlive="false" />     
</system.webServer>  
</configuration>  

Best Regards,
Joy

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Answer 3

Good Evening Experts,
i have the same issue and i'm not sure where to add the lines, like AshishSinha.
Please coul you give us more details?

Answer 4

Same issue here as well. I cannot find the <system.net> section on the web.config file under the C:\Program Files\Microsoft SQL Server Reporting Services\SSRS\ReportServer.