ERROR: Throwing Microsoft.ReportingServices.Diagnostics.Utilities.ReportServerStorageException

Question

hello all,
Actually , i had raised this quetion in past but had not satisfied with the answers.
explaining in brief this time so , can get actual cause of this.
I have two reports subscriptions on same time ..
subscriptions executed fine on some day and  throws error sometimes ..
have a look at log files..
---events started .... imporatant events status as per my understanding
library!WindowsService_1!8d0!02/07/2015-10:30:04:: i INFO: RenderForNewSession('/EDP_Reports/HR And Admin/HR_yesterday_Missing_Punch_Report_005')
library!WindowsService_1!ab0!02/07/2015-10:30:04:: i INFO: RenderForNewSession('/EDP_Reports/Sales/SA_Stagewise_Completed_Files_Report-002')
setting default values Configuarions..
---library!WindowsService_1!ab0!02/07/2015-10:30:05:: i INFO: Initializing ChunkSegmentSize to default value of '32320' Bytes because it was not specified in Server system properties.
library!WindowsService_1!8d0!02/07/2015-10:30:06:: i INFO: Initializing ResponseBufferSizeKb to default value of '64' KB because it was not specified in Server system properties.
library!WindowsService_1!ab0!02/07/2015-10:30:09:: i INFO: Initializing SessionTimeout to '600' second(s) as specified in Server system properties.
library!WindowsService_1!8d0!02/07/2015-10:30:12:: e ERROR: Throwing Microsoft.ReportingServices.Diagnostics.Utilities.ReportServerStorageException: , An error occurred within the report server database.  This may be due to a connection failure,
timeout or low disk condition within the database.;
emailextension!WindowsService_1!8d0!02/07/2015-10:30:12:: e ERROR: Error sending email. Microsoft.ReportingServices.Diagnostics.Utilities.ReportServerStorageException: An error occurred within the report server database.  This may be due to a connection
failure, timeout or low disk condition within the database.
---> System.Data.SqlClient.SqlException: Transaction (Process ID 59) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction.
notification!WindowsService_1!8d0!02/07/2015-10:30:12:: e ERROR: Error occured processing subscription 2dc49fc1-f7e2-4bd6-a0b9-5ee846db6906: Failure sending mail: An error occurred within the report server database.  This may be due to a connection
failure, timeout or low disk condition within the database.Mail will not be resent.
please, explain me the cause why this is happening is it deadlock or what??
and are my default value stated above are effiecient to perform tasks ..
i.e. SessionTimeout to '600' second(s) etc.
help must appreciated  ..
Dilip Patil..

Answer 1

Hi Dilip,
The error message "An error occurred within the report server database. This may be due to a connection failure, timeout or low disk condition within the database", the issue can be caused by many factors, usually occurs due to large size
or bad rows of some tables in the ReportServerTempDB database.
If we view the script of the CleanExpiredSessions stored procedure of the ReportServer database, we can see that it first grabs 20 records from the ReportServerTempDB.dbo.SessionData table and then removes those from the ReportServerTempDB.dbo.SessionLock
table. If there are bad rows in the SessionData table, the CleanExpiredSessions functionality may encounter an issue. Here, I suggest that you clean the SessionData table as well as the SessionLock table, and check the issue again.
Please also try to apply the latest service pack according to your SQL Server Reporting Services version.
Did the subscription failed many times? If possible, please also try to recreate the subscription.
Similar thread for your reference:
SSRS 2008: connection failure, timeout or low disk
condition within the database. (rsReportServerDatabaseError)
Inconsistent EMail Subscription
If you still have any problem, please feel free to ask.
Regards
Vicky Liu
Vicky Liu
TechNet Community Support