EF4 and DevARt 8.4.389 random transaction exception
Posted: Tue 13 Feb 2018 18:12
Hello,
I have a WCF C# web service (EF4 and devart driver for oracle 8.4.389.0) that is called each 5 secondes and do a lot of work : it hit the oracle 11g database to extract various informations.
and under heavyload I got this kind of error messages :
I have read a lot about transactions but not found any reason why my service is failing.
I have checked the MSDTC log on my web server and db server and I haven't found any trace about a distributed transaction. I have really no any clue about what is going on here. could you help me with the stacktrace or tell me where to search further?
I have a WCF C# web service (EF4 and devart driver for oracle 8.4.389.0) that is called each 5 secondes and do a lot of work : it hit the oracle 11g database to extract various informations.
and under heavyload I got this kind of error messages :
Code: Select all
system.data.entityexception : underlying provider failed on Open
---> System.Transactions.TransactionException: The operation is not valid for the state of the transaction.
---> System.TimeoutException: Transaction Timeout
--- End of inner exception stack trace ---
at System.Transactions.TransactionState.EnlistVolatile(InternalTransaction tx, IEnlistmentNotification enlistmentNotification, EnlistmentOptions enlistmentOptions, Transaction atomicTransaction)
at System.Transactions.Transaction.EnlistVolatile(IEnlistmentNotification enlistmentNotification, EnlistmentOptions enlistmentOptions)
at Devart.Common.DbConnectionInternal.EnlistToDistributedTransactionInternal(Transaction transaction)
at Devart.Common.DbConnectionInternal.e()
at Devart.Common.DbConnectionFactory.b(DbConnectionBase A_0)
at Devart.Common.DbConnectionClosed.Open(DbConnectionBase outerConnection)
at Devart.Common.DbConnectionBase.Open()
at Devart.Data.Oracle.OracleConnection.Open()
at System.Data.EntityClient.EntityConnection.OpenStoreConnectionIf(Boolean openCondition, DbConnection storeConnectionToOpen, DbConnection originalConnection, String exceptionCode, String attemptedOperation, Boolean& closeStoreConnectionOnFailure)
--- End of inner exception stack trace ---
at System.Data.EntityClient.EntityConnection.OpenStoreConnectionIf(Boolean openCondition, DbConnection storeConnectionToOpen, DbConnection originalConnection, String exceptionCode, String attemptedOperation, Boolean& closeStoreConnectionOnFailure)
at System.Data.EntityClient.EntityConnection.Open()
at System.Data.Objects.ObjectContext.EnsureConnection()
at System.Data.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption)
at System.Data.Objects.ObjectQuery`1.System.Collections.Generic.IEnumerable<T>.GetEnumerator()
at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
at System.Data.Objects.ELinq.ObjectQueryProvider.<GetElementFunction>b__1[TResult](IEnumerable`1 sequence)
at System.Data.Objects.ELinq.ObjectQueryProvider.ExecuteSingle[TResult](IEnumerable`1 query, Expression queryRoot)
at System.Data.Objects.ELinq.ObjectQueryProvider.System.Linq.IQueryProvider.Execute[S](Expression expression)
at System.Linq.Queryable.FirstOrDefault[TSource](IQueryable`1 source)
at BSServices.Catalog.GetProductInfo(String tenantId)I have checked the MSDTC log on my web server and db server and I haven't found any trace about a distributed transaction. I have really no any clue about what is going on here. could you help me with the stacktrace or tell me where to search further?