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HDInsight release will be available to all regions over several days. This release note is applicable for image number **2405081840**. [How to check the image number?](./view-hindsight-cluster-image-version.md)
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HDInsight uses safe deployment practices, which involve gradual region deployment. It might take up to 10 business days for a new release or a new version to be available in all regions.
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**OS versions**
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* HDInsight 5.0: Ubuntu 18.04.5 LTS Linux Kernel 5.4
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* HDInsight 4.0: Ubuntu 18.04.5 LTS Linux Kernel 5.4
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> [!NOTE]
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> Ubuntu 18.04 is supported under [Extended Security Maintenance(ESM)](https://techcommunity.microsoft.com/t5/linux-and-open-source-blog/canonical-ubuntu-18-04-lts-reaching-end-of-standard-support/ba-p/3822623) by the Azure Linux team for [Azure HDInsight July 2023](/azure/hdinsight/hdinsight-release-notes-archive#release-date-july-25-2023), release onwards.
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For workload specific versions, see [HDInsight 5.x component versions](./hdinsight-5x-component-versioning.md).
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## Fixed issues
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* Added API in gateway to get token for Keyvault, as part of the SFI initiative.
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* In the new Log monitor `HDInsightSparkLogs` table, for log type `SparkDriverLog`, some of the fields were missing. For example, `LogLevel & Message`. This release adds the missing fields to schemas and fixed formatting for `SparkDriverLog`.
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* Livy logs not available in Log Analytics monitoring `SparkDriverLog` table, which was due to an issue with Livy log source path and log parsing regex in `SparkLivyLog` configs.
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* Any HDInsight cluster, using ADLS Gen2 as a primary storage account can leverage MSI based access to any of the Azure resources (for example, SQL, Keyvaults) which is used within the application code.
* [Basic and Standard A-series VMs Retirement](https://azure.microsoft.com/updates/basic-and-standard-aseries-vms-on-hdinsight-will-retire-on-31-august-2024/).
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* On August 31, 2024, we'll retire Basic and Standard A-series VMs. Before that date, you need to migrate your workloads to Av2-series VMs, which provide more memory per vCPU and faster storage on solid-state drives (SSDs).
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* To avoid service disruptions, [migrate your workloads](https://aka.ms/Av1retirement) from Basic and Standard A-series VMs to Av2-series VMs before August 31, 2024.
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* Retirement Notifications for [HDInsight 4.0](https://azure.microsoft.com/updates/azure-hdinsight-40-will-be-retired-on-31-march-2025-migrate-your-hdinsight-clusters-to-51) and [HDInsight 5.0](https://azure.microsoft.com/updates/hdinsight5retire/).
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If you have any more questions, contact [Azure Support](https://ms.portal.azure.com/#view/Microsoft_Azure_Support/HelpAndSupportBlade/~/overview).
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You can always ask us about HDInsight on [Azure HDInsight - Microsoft Q&A](/answers/tags/168/azure-hdinsight).
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We're listening: You’re welcome to add more ideas and other topics here and vote for them - [HDInsight Ideas](https://feedback.azure.com/d365community/search/?q=HDInsight) and follow us for more updates on [AzureHDInsight Community](https://www.linkedin.com/groups/14313521/).
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> [!NOTE]
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> We advise customers to use to latest versions of HDInsight [Images](./view-hindsight-cluster-image-version.md) as they bring in the best of open source updates, Azure updates and security fixes. For more information, see [Best practices](./hdinsight-overview-before-you-start.md).
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### Release date: April 15, 2024
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This release note applies to :::image type="icon" source="./media/hdinsight-release-notes/yes-icon.svg" border="false"::: HDInsight 5.1 version.
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For workload specific versions, see [HDInsight 5.x component versions](./hdinsight-5x-component-versioning.md).
* Bug fixes for Log analytics module for HDInsightSparkLogs
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- Apache Ranger support for Spark SQL in Spark 3.3.0 (HDInsight version 5.1) with Enterprise security package. Learn more about it [here](./spark/ranger-policies-for-spark.md).
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