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PONpgsql causing System.NotSupportedException
 

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  1. PONpgsql causing System.NotSupportedException
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    <p>For the last two years we've been developing a web based application with ASP.NET MVC 3, NHibernate (v. 3.3.1.4000) and PostgreSql for back-end database, therefore using the Npgsql driver (v. 2.0.12.0). The system has been in successful exploitation on 4 different client servers and has never produced the error I encountered on a new server we setup recently. The exception has occurred only once, upon the initial population with data, and prevented some business entities from being stored to the DB. I really must make sure that in the future the error is properly handled, if not at all possible to be avoided, but am at a loss how. Searching the site and the internet in general for this or similar errors has produced no information. Has any of you encountered this problem or have an idea how to fix it? Thanks :)</p> <p>Here's the error:</p> <pre><code>System.NotSupportedException: This stream does not support seek operations. at System.Net.Sockets.NetworkStream.Seek(Int64 offset, SeekOrigin origin) at System.IO.BufferedStream.FlushRead() at System.IO.BufferedStream.WriteByte(Byte value) at Npgsql.NpgsqlSync.WriteToStream(Stream outputStream) at Npgsql.NpgsqlReadyState.SyncEnum(NpgsqlConnector context) at Npgsql.NpgsqlState.Sync(NpgsqlConnector context) at Npgsql.ForwardsOnlyDataReader.GetNextResponseObject() at Npgsql.ForwardsOnlyDataReader.GetNextRowDescription() at Npgsql.ForwardsOnlyDataReader.NextResult() at Npgsql.ForwardsOnlyDataReader..ctor(IEnumerable`1 dataEnumeration, CommandBehavior behavior, NpgsqlCommand command, NotificationThreadBlock threadBlock, Boolean synchOnReadError) at Npgsql.NpgsqlCommand.GetReader(CommandBehavior cb) at Npgsql.NpgsqlCommand.ExecuteNonQuery() at NHibernate.AdoNet.AbstractBatcher.ExecuteNonQuery(IDbCommand cmd) at NHibernate.AdoNet.NonBatchingBatcher.AddToBatch(IExpectation expectation) at NHibernate.Persister.Entity.AbstractEntityPersister.Insert(Object id, Object[] fields, Boolean[] notNull, Int32 j, SqlCommandInfo sql, Object obj, ISessionImplementor session) at NHibernate.Persister.Entity.AbstractEntityPersister.Insert(Object id, Object[] fields, Object obj, ISessionImplementor session) at NHibernate.Action.EntityInsertAction.Execute() at NHibernate.Engine.ActionQueue.Execute(IExecutable executable) at NHibernate.Engine.ActionQueue.ExecuteActions(IList list) at NHibernate.Engine.ActionQueue.ExecuteActions() at NHibernate.Event.Default.AbstractFlushingEventListener.PerformExecutions(IEventSource session) at NHibernate.Event.Default.DefaultFlushEventListener.OnFlush(FlushEvent event) at NHibernate.Impl.SessionImpl.Flush() at NHibernate.Transaction.AdoTransaction.Commit() </code></pre>
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
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    1. This table or related slice is empty.
    1. USDimitar Lichev
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
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    1. This table or related slice is empty.
    1. COAnd this is caused by what code?
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      1. PONpgsql causing System.NotSupportedException
      1. USMilen A. Radev
    2. COUnfortunately, I don't know. The error has happened in production and this is what I have from the logs. There's no inner exception.
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      1. PONpgsql causing System.NotSupportedException
      1. USDimitar Lichev
 

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