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description: Learn about the currently known issues with Azure Synapse Analytics, and their possible workarounds or resolutions.
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author: charithdilshan
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ms.author: ccaldera
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ms.date: 3/6/2023
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ms.date: 3/9/2023
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ms.service: synapse-analytics
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ms.subservice: overview
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ms.topic: conceptual
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This page lists the known issues in [Azure Synapse Analytics](overview-what-is.md), as well as their resolution date or possible workaround.
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Before submitting a Support request, please review this list to see if the issue that you're experiencing is already known and being addressed.
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To learn more about Azure Synapse Analytics, see the [Overview](index.yml), and [What's new in Azure Synapse Analytics?](whats-new.md).
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To learn more about Azure Synapse Analytics, see the [Azure Synapse Analytics Overview](index.yml), and [What's new in Azure Synapse Analytics?](whats-new.md).
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## Active Known issues
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|Issue |Status |Synapse Component|
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|Azure Synapse Component|Status|Issue|
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|---------|---------|---------|
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|[Queries using Azure AD authentication fails after 1 hour](#queries-using-azure-ad-authentication-fails-after-1-hour)|Has Workaround|Azure Synapse Serverless SQL Pool|
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|[Query failures from Serverless SQL to Cosmos DB analytical store](#query-failures-from-serverless-sql-pool-to-azure-cosmos-db-analytical-store)|Has Workaround|Azure Synapse Serverless SQL pool|
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|[Query failures while reading Cosmos Data using OPENROWSET](#query-failures-while-reading-cosmos-data-using-openrowset)|Has Workaround|Azure Synapse Serverless SQL Pool|
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|[Cosmos DB analytical store view propagates wrong attributes in the column](#cosmos-db-analytical-store-view-propagates-wrong-attributes-in-the-column)|Has Workaround|Azure Synapse Serverless SQL Pool|
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|[Queries failing with Data Exfiltration Error](#queries-failing-with-data-exfiltration-error)|Has Workaround|Azure Synapse Dedicated SQL Pool|
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|[Blob storage linked service with User Assigned Managed Identity (UAMI) is not getting listed](#blob-storage-linked-service-with-user-assigned-managed-identity-uami-is-not-getting-listed)|Has Workaround|Azure Synapse Workspace|
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|[Failed to delete Synapse workspace & Unable to delete virtual network](#failed-to-delete-synapse-workspace--unable-to-delete-virtual-network)|Has Workaround|Azure Synapse Workspace|
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|Azure Synapse serverless SQL pool|[Queries using Azure AD authentication fails after 1 hour](#queries-using-azure-ad-authentication-fails-after-1-hour)|Has Workaround|
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|Azure Synapse serverless SQL pool|[Query failures from serverless SQL pool to Azure Cosmos DB analytical store](#query-failures-from-serverless-sql-pool-to-azure-cosmos-db-analytical-store)|Has Workaround|
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|Azure Synapse serverless SQL pool|[Azure Cosmos DB analytical store view propagates wrong attributes in the column](#azure-cosmos-db-analytical-store-view-propagates-wrong-attributes-in-the-column)|Has Workaround|
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|Azure Synapse dedicated SQL pool|[Queries failing with Data Exfiltration Error](#queries-failing-with-data-exfiltration-error)|Has Workaround|
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|Azure Synapse Workspace|[Blob storage linked service with User Assigned Managed Identity (UAMI) is not getting listed](#blob-storage-linked-service-with-user-assigned-managed-identity-uami-is-not-getting-listed)|Has Workaround|
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|Azure Synapse Workspace|[Failed to delete Synapse workspace & Unable to delete virtual network](#failed-to-delete-synapse-workspace--unable-to-delete-virtual-network)|Has Workaround|
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## Azure Synapse Analytics Serverless SQL Pool known issues summary
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## Azure Synapse Analytics serverless SQL pool active known issues summary
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### Queries using Azure AD authentication fails after 1 hour
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1) It's recommended switching to Service Principal, Managed Identity or Shared Access Signature instead of using user identity for long running queries.
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2) Restarting client (SSMS/ADS) acquires new token to establish the connection.
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### Query failures from Serverless SQL pool to Azure Cosmos DB analytical store
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### Query failures from serverless SQL pool to Azure Cosmos DB analytical store
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Queries from a serverless SQL pool to Azure Cosmos DB analytical store might fail with one of the following error messages:
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1) Retry the failed query. It will automatically refresh the expired token.
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2) Disable the private endpoint. Before applying this change, confirm with your security team that it meets your company security policies.
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### Query failures while reading Cosmos Data using OPENROWSET
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### Azure Cosmos DB analytical store view propagates wrong attributes in the column
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Queries from serverless SQL pool to Cosmos DB Analytical Store using OPENROWSET fails with the following error message:
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`Resolving CosmosDB path has failed with error 'bad allocation'.`
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**Workaround**: The engineering team is aware of this behavior and working on a fix. If you encounter this error engage Microsoft Support Team for assistance.
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### Cosmos DB analytical store view propagates wrong attributes in the column
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While using views in Synapse serverless pool over CosmosDB analytical store, If there is a change on files in the CosmosDB analytical store, the change does not get propagated correctly to the SELECT statements, the customer is using on the view. As a result of that, the attributes get incorrectly mapped to a different column in the results.
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While using views in Azure Synapse serverless pool over Cosmos DB analytical store, If there is a change on files in the Cosmos DB analytical store, the change does not get propagated correctly to the SELECT statements, the customer is using on the view. As a result of that, the attributes get incorrectly mapped to a different column in the results.
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**Workaround**: The engineering team is aware of this behavior and following actions can be taken as quick mitigation:
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1) Recreate the view by renaming the columns.
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2) Avoid using views if possible.
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## Azure Synapse Analytics Dedicated SQL pool known issues summary
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## Azure Synapse Analytics Dedicated SQL pool active known issues summary
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### Queries failing with Data Exfiltration Error
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**Workaround**: If you encountered a similar error, engage Microsoft Support Team for assistance.
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## Azure Synapse workspace known issues summary
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## Azure Synapse workspace active known issues summary
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The following are known issues with the Synapse workspace.
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**Workaround**: The problem can be mitigated by retrying the delete operation. The engineering team is aware of this behavior and working on a fix.
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## Recently Closed Known issues
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|Synapse Component|Issue|Status|Date Resolved
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|---------|---------|---------|---------|
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|Azure Synapse serverless SQL pool|[Query failures while reading Cosmos DB data using OPENROWSET](#query-failures-while-reading-azure-cosmos-db-data-using-openrowset)|Resolved|March 2023
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## Azure Synapse Analytics serverless SQL pool recently closed known issues summary
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### Query failures while reading Azure Cosmos DB data using OPENROWSET
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Queries from serverless SQL pool to Cosmos DB Analytical Store using OPENROWSET fails with the following error message:
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`Resolving CosmosDB path has failed with error 'bad allocation'.`
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**Status**: Resolved
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## Next steps
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-[Synapse Studio troubleshooting](troubleshoot/troubleshoot-synapse-studio.md)
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