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articles/hdinsight/hdinsight-40-component-versioning.md

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description: Learn about the open-source components and versions in Azure HDInsight 4.0.
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ms.service: hdinsight
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ms.topic: conceptual
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ms.date: 03/08/2023
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ms.date: 04/11/2024
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# HDInsight 4.0 component versions

articles/hdinsight/hdinsight-hadoop-provision-linux-clusters.md

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ms.service: hdinsight
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ms.topic: conceptual
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ms.custom: hdinsightactive, devx-track-azurepowershell, linux-related-content
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ms.date: 03/16/2023
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ms.date: 04/11/2024
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# Set up clusters in HDInsight with Apache Hadoop, Apache Spark, Apache Kafka, and more
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## Basics
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:::image type="content" source="./media/hdinsight-hadoop-provision-linux-clusters/azure-portal-cluster-basics-blank-fs.png" alt-text="hdinsight create options custom quick.":::
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:::image type="content" source="./media/hdinsight-hadoop-provision-linux-clusters/azure-portal-cluster-basics-blank-fs.png" alt-text="HDInsight create options custom quick.":::
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### Project details
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The HTTP username has the following restrictions:
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* Allowed special characters: `_` and `@`
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* Characters not allowed: #;."',/:`!*?$(){}[]<>|&--=+%~^space
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* Characters not allowed: `#;."',/:`!*?$(){}[]<>|&--=+%~^space`
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* Max length: 20
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The SSH username has the following restrictions:
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* Allowed special characters:`_` and `@`
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* Characters not allowed: #;."',/:`!*?$(){}[]<>|&--=+%~^space
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* Characters not allowed: `#;."',/:`!*?$(){}[]<>|&--=+%~^space`
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* Max length: 64
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* Reserved names: hadoop, users, oozie, hive, mapred, ambari-qa, zookeeper, tez, hdfs, sqoop, yarn, hcat, ams, hbase, administrator, admin, user, user1, test, user2, test1, user3, admin1, 1, 123, a, actuser, adm, admin2, aspnet, backup, console, david, guest, john, owner, root, server, sql, support, support_388945a0, sys, test2, test3, user4, user5, spark
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* Reserved names: hadoop, users, oozie, hive, mapred, ambari-qa, zookeeper, tez, hdfs, sqoop, yarn, hcat, ams, hbase, administrator, admin, user, user1, test, user2, test1, user3, admin1, 1, 123, a, `actuser`, adm, admin2, aspnet, backup, console, David, guest, John, owner, root, server, sql, support, support_388945a0, sys, test2, test3, user4, user5, spark
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## Storage
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## Security + networking
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:::image type="content" source="./media/hdinsight-hadoop-provision-linux-clusters/azure-portal-cluster-security-networking.png" alt-text="hdinsight create options choose enterprise security package.":::
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:::image type="content" source="./media/hdinsight-hadoop-provision-linux-clusters/azure-portal-cluster-security-networking.png" alt-text="HDInsight create options choose enterprise security package.":::
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### Enterprise security package
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> The added disks are only configured for node manager local directories and **not for datanode directories**
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HDInsight cluster comes with pre-defined disk space based on SKU. Running some large applications, can lead to insufficient disk space, (with disk full error - ```LinkId=221672#ERROR_NOT_ENOUGH_DISK_SPACE```) and job failures.
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HDInsight cluster comes with pre-defined disk space based on SKU. If you run some large applications, can lead to insufficient disk space, with disk full error - `LinkId=221672#ERROR_NOT_ENOUGH_DISK_SPACE` and job failures.
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More discs can be added to the cluster using the new feature **NodeManager**’s local directory. At the time of Hive and Spark cluster creation, the number of discs can be selected and added to the worker nodes. The selected disk, which will be of size 1TB each, would be part of **NodeManager**'s local directories.
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articles/hdinsight/hdinsight-overview-versioning.md

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description: Learn how versioning works in Azure HDInsight.
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# How versioning works in HDInsight

articles/hdinsight/hdinsight-private-link.md

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# Enable Private Link on an HDInsight cluster
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## <a name="DisableNetworkPolicy"></a>Step 2: Configure HDInsight subnet
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- **Disable privateLinkServiceNetworkPolicies on subnet.** In order to choose a source IP address for your Private Link service, an explicit disable setting ```privateLinkServiceNetworkPolicies``` is required on the subnet. Follow the instructions here to [disable network policies for Private Link services](../private-link/disable-private-link-service-network-policy.md).
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- **Enable Service Endpoints on subnet.** For successful deployment of a Private Link HDInsight cluster, we recommend that you add the *Microsoft.SQL*, *Microsoft.Storage*, and *Microsoft.KeyVault* service endpoint(s) to your subnet prior to cluster deployment. [Service endpoints](../virtual-network/virtual-network-service-endpoints-overview.md) route traffic directly from your virtual network to the service on the Microsoft Azure backbone network. Keeping traffic on the Azure backbone network allows you to continue auditing and monitoring outbound Internet traffic from your virtual networks, through forced-tunneling, without impacting service traffic.
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- **Enable Service Endpoints on subnet.** For successful deployment of a Private Link HDInsight cluster, we recommend that you add the `Microsoft.SQL`, `Microsoft.Storage`, and `Microsoft.KeyVault` service endpoint(s) to your subnet prior to cluster deployment. [Service endpoints](../virtual-network/virtual-network-service-endpoints-overview.md) route traffic directly from your virtual network to the service on the Microsoft Azure backbone network. Keeping traffic on the Azure backbone network allows you to continue auditing and monitoring outbound Internet traffic from your virtual networks, through forced-tunneling, without impacting service traffic.
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## <a name="NATorFirewall"></a>Step 3: Deploy NAT gateway *or* firewall

articles/hdinsight/kafka/apache-esp-kafka-ssl-encryption-authentication.md

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# Set up TLS encryption and authentication for ESP Apache Kafka cluster in Azure HDInsight

articles/hdinsight/kafka/connect-kafka-cluster-with-vm-in-different-vnet.md

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# How to connect Kafka cluster with VM in different VNet

articles/hdinsight/kafka/rest-proxy.md

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# Interact with Apache Kafka clusters in Azure HDInsight using a REST proxy

articles/hdinsight/log-analytics-migration.md

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# Log Analytics migration guide for Azure HDInsight clusters

articles/hdinsight/spark/apache-troubleshoot-spark.md

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description: Get answers to common questions about working with Apache Spark and Azure HDInsight.
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# Troubleshoot Apache Spark by using Azure HDInsight

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