The symptoms are similar and both are related to contention for database resources by multiple processes. What does affect the locking mode for thisĭoes each and blocking locks are often confused. You mentioned that LockMode.Upgrade or Read doesn’t haveĪnything to do with TrackingObjects because it is in a different table. Where an item is inserted into the collection, it does so in a foreach over theĭata returned from another location (again, data driven but could be a few orĬould be a lot of items in the list to be inserted). I also want to mention that in the 2 places in the code Locking on the trackingsagadata_key (from the mocked data sample above). Or more processes are attempting to INSERT INTO the TrackingObject collection and The SQL Server key lock deadlocks are definitely because 2 Now processes some things successfully but it still has regular deadlocking on Instead of almost everything deadlocking, it I think that helped but it did not completely solve the deadlock problem. ![]() I changed the saga data definition from Dictionary to List and Here is a mocked example of the Saga data: Tracking objects are just a collection to help know how many sub workflows the There are any non-complete tracking objects and if all are complete it marks the Saga2 might have 20 sub-workflows and they alsoĪt each final message update, the saga checks to see if Might take longer and sub-workflow 2 might take a much longer time. ![]() In this example, sub-workflow 1 completes in Tracking/persistence periodically during this processing. The saga records tracking info and updates its Object is complete the saga can then be completed.įor example, saga1 might start 3 sub-workflows. So, the last update handler basically has toĬheck to see if all sub workflow progress is complete and if every tracking Workflow is essentially identical except for the data. An additional complication is that each sub Tracking objects are complete, the saga knows its complete. Object to track that it started a sub workflow, tracked its progress, and then The data collected during the process determines ![]() Workflows it will have to initiate until it has initiated them all. Tracking objects is because it doesn’t know how many data acquisition sub The saga initiates several sub workflows during the course Lighten the locks in the collection table because of a concurrent scenario? With a saga data that contains a dictionary object (sub table) but how to Sure, just trying to follow the pattern) but I don’t know what to do nextīecause this doesn’t even build since I need to return a SagaData here and notĭo you have any tips, samples, or references for how to deal I am assuming Get locks less records? (not really Public NHibernateStorageContext StorageContext " This worked great in a single threaded environment but in a multithreadedĮnvironment this does little more than deadlock (almost every message). Started with a custom IFindSaga that allowed me to pull the two properties from On lock resources with another process and has been chosen as the deadlock : Transaction (Process ID 70) was deadlocked Could not synchronize database state with session Was deadlocked on lock resources with another process and has been chosen as ![]() SQL server deadlocks and I don’t understand why. However, the production environment is highlyĬoncurrent and my saga mapping falls apart and degenerates into a log full of My saga mapping works great (both versions that I will describe below). A situation where I have 2 properties that together uniquely identify my saga
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