# Build Error (rarely)
**URL:** https://www.finalbuilder.com/forums/t/build-error-rarely/5903
**Category:** Bugs
**Created:** [April 17, 2014, 1:09am UTC](https://www.finalbuilder.com/forums/t/build-error-rarely/5903 "2014-04-17T01:09:29Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@christian.leh](https://www.finalbuilder.com/forums/u/christian.leh)
#### Post date: [April 17, 2014, 1:09am UTC](https://www.finalbuilder.com/forums/t/build-error-rarely/5903/1 "2014-04-17T01:09:29Z")
Seems like a deadlock issue (at the bottom)
Importance: Error
Date: Donnerstag, 17. April 2014
Time: 12:22:35
Message:
Build Controller
An exception occurred while creating build log. Details: Exception: GenericADOException
Message: could not update: [Continua.Modules.Builds.Build#6014][SQL: UPDATE builds\_build SET status\_message = ?, status\_datetime = ? WHERE Id = ?]
Stack Trace: bei NHibernate.Persister.Entity.AbstractEntityPersister.Update(Object id, Object[] fields, Object[] oldFields, Object rowId, Boolean[] includeProperty, Int32 j, Object oldVersion, Object obj, SqlCommandInfo sql, ISessionImplementor session)
bei NHibernate.Persister.Entity.AbstractEntityPersister.UpdateOrInsert(Object id, Object[] fields, Object[] oldFields, Object rowId, Boolean[] includeProperty, Int32 j, Object oldVersion, Object obj, SqlCommandInfo sql, ISessionImplementor session)
bei NHibernate.Persister.Entity.AbstractEntityPersister.Update(Object id, Object[] fields, Int32[] dirtyFields, Boolean hasDirtyCollection, Object[] oldFields, Object oldVersion, Object obj, Object rowId, ISessionImplementor session)
bei NHibernate.Action.EntityUpdateAction.Execute()
bei NHibernate.Engine.ActionQueue.Execute(IExecutable executable)
bei NHibernate.Engine.ActionQueue.ExecuteActions(IList list)
bei NHibernate.Engine.ActionQueue.ExecuteActions()
bei NHibernate.Event.Default.AbstractFlushingEventListener.PerformExecutions(IEventSource session)
bei NHibernate.Event.Default.DefaultFlushEventListener.OnFlush(FlushEvent event)
bei NHibernate.Impl.SessionImpl.Flush()
bei NHibernate.Transaction.AdoTransaction.Commit()
bei Continua.Shared.Data.Hibernate.NHibernateDatabase.SaveChanges()
bei Continua.Modules.Builds.BuildManager.\<\>c\_\_DisplayClass6f.b\_\_6e(Int32 x)
bei Continua.Shared.Utils.LockList`1.WithLock(TId id, Action`1 action)
bei Continua.Modules.Builds.BuildManager.UpdateStatus(Build build, BuildState newState, String message, EntityDTO configuration, EntityDTO project)
bei Continua.Modules.Builds.BuildController.Initialise(Int32 buildId)
Exception: NpgsqlException
Message: FEHLER: 40P01: Verklemmung (Deadlock) entdeckt
Stack Trace: bei Npgsql.NpgsqlState.d\_\_a.MoveNext()
bei Npgsql.ForwardsOnlyDataReader.GetNextResponseObject()
bei Npgsql.ForwardsOnlyDataReader.GetNextRowDescription()
bei Npgsql.ForwardsOnlyDataReader.NextResult()
bei Npgsql.ForwardsOnlyDataReader..ctor(IEnumerable`1 dataEnumeration, CommandBehavior behavior, NpgsqlCommand command, NotificationThreadBlock threadBlock, Boolean synchOnReadError)
bei Npgsql.NpgsqlCommand.GetReader(CommandBehavior cb)
bei Npgsql.NpgsqlCommand.ExecuteNonQuery()
bei NHibernate.AdoNet.AbstractBatcher.ExecuteNonQuery(IDbCommand cmd)
bei NHibernate.AdoNet.NonBatchingBatcher.AddToBatch(IExpectation expectation)
bei NHibernate.Persister.Entity.AbstractEntityPersister.Update(Object id, Object[] fields, Object[] oldFields, Object rowId, Boolean[] includeProperty, Int32 j, Object oldVersion, Object obj, SqlCommandInfo sql, ISessionImplementor session)
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### Author:  [@Vincent](https://www.finalbuilder.com/forums/u/Vincent)
#### Post date: [April 18, 2014, 5:47am UTC](https://www.finalbuilder.com/forums/t/build-error-rarely/5903/2 "2014-04-18T05:47:05Z")
Yes, we have seen the occasional deadlock, and have done a lot of work to try and resolve them, but they so still happen occasionally.