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From aonis...@apache.org
Subject [04/10] ambari git commit: AMBARI-18727. Add upgrade packs for HDP-2.6 (aonishuk)
Date Fri, 28 Oct 2016 15:21:59 GMT
http://git-wip-us.apache.org/repos/asf/ambari/blob/52cceb73/ambari-server/src/main/resources/stacks/HDP/2.3/upgrades/upgrade-2.6.xml
----------------------------------------------------------------------
diff --git a/ambari-server/src/main/resources/stacks/HDP/2.3/upgrades/upgrade-2.6.xml b/ambari-server/src/main/resources/stacks/HDP/2.3/upgrades/upgrade-2.6.xml
new file mode 100644
index 0000000..adc1a29
--- /dev/null
+++ b/ambari-server/src/main/resources/stacks/HDP/2.3/upgrades/upgrade-2.6.xml
@@ -0,0 +1,1167 @@
+<?xml version="1.0"?>
+<!--
+   Licensed to the Apache Software Foundation (ASF) under one or more
+   contributor license agreements.  See the NOTICE file distributed with
+   this work for additional information regarding copyright ownership.
+   The ASF licenses this file to You under the Apache License, Version 2.0
+   (the "License"); you may not use this file except in compliance with
+   the License.  You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+-->
+
+<upgrade xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="upgrade-pack.xsd">
+  <target>2.6.*.*</target>
+  <target-stack>HDP-2.6</target-stack>
+  <skip-failures>false</skip-failures>
+  <skip-service-check-failures>false</skip-service-check-failures>
+  <type>ROLLING</type>
+  <prerequisite-checks>
+    <!-- List of additional pre-req checks to run in addition to the required pre-reqs -->
+    <check>org.apache.ambari.server.checks.HiveMultipleMetastoreCheck</check>
+    <check>org.apache.ambari.server.checks.SecondaryNamenodeDeletedCheck</check>
+    <check>org.apache.ambari.server.checks.ServicesMapReduceDistributedCacheCheck</check>
+    <check>org.apache.ambari.server.checks.ServicesNamenodeHighAvailabilityCheck</check>
+    <check>org.apache.ambari.server.checks.ServicesNamenodeTruncateCheck</check>
+    <check>org.apache.ambari.server.checks.ServicesTezDistributedCacheCheck</check>
+    <check>org.apache.ambari.server.checks.ServicesYarnWorkPreservingCheck</check>
+    <check>org.apache.ambari.server.checks.YarnRMHighAvailabilityCheck</check>
+    <check>org.apache.ambari.server.checks.YarnTimelineServerStatePreservingCheck</check>
+    <check>org.apache.ambari.server.checks.AtlasPresenceCheck</check>
+    <check>org.apache.ambari.server.checks.RangerAuditDbCheck</check>
+
+    <!-- Specific to HDP 2.5, Storm is not rolling -->
+    <check>org.apache.ambari.server.checks.StormShutdownWarning</check>
+
+    <configuration>
+      <!-- Configuration properties for all pre-reqs including required pre-reqs -->
+      <!--TODO: is it required? -->
+      <check-properties name="org.apache.ambari.server.checks.HiveDynamicServiceDiscoveryCheck">
+        <property name="min-failure-stack-version">HDP-2.3.0.0</property>
+      </check-properties>
+    </configuration>
+  </prerequisite-checks>
+
+  <!-- Instructs the upgrade pack how to build the configuration pack -->
+  <upgrade-path>
+    <intermediate-stack version="2.4"/>
+    <intermediate-stack version="2.5"/>
+  </upgrade-path>
+
+  <order>
+    <group xsi:type="cluster" name="PRE_CLUSTER" title="Prepare Upgrade">
+      <direction>UPGRADE</direction>
+      <supports-auto-skip-failure>false</supports-auto-skip-failure>
+
+      <execute-stage service="HDFS" component="NAMENODE" title="Pre Upgrade HDFS">
+        <task xsi:type="execute" hosts="master">
+          <script>scripts/namenode.py</script>
+          <function>prepare_rolling_upgrade</function>
+        </task>
+      </execute-stage>
+
+      <execute-stage service="TEZ" component="TEZ_CLIENT" title="Check Tez Tarball">
+        <task xsi:type="execute" hosts="any">
+          <script>scripts/pre_upgrade.py</script>
+          <function>prepare</function>
+        </task>
+      </execute-stage>
+    </group>
+
+    <group xsi:type="cluster" name="PREPARE_BACKUPS" title="Prepare Backups">
+      <direction>UPGRADE</direction>
+      <skippable>true</skippable>
+      <supports-auto-skip-failure>false</supports-auto-skip-failure>
+
+      <execute-stage service="HBASE" component="HBASE_MASTER" title="Pre Upgrade HBase Backup">
+        <task xsi:type="execute" hosts="master">
+          <script>scripts/hbase_upgrade.py</script>
+          <function>take_snapshot</function>
+        </task>
+      </execute-stage>
+
+      <execute-stage service="HIVE" component="HIVE_METASTORE" title="Pre Upgrade Hive Backup">
+        <task xsi:type="manual">
+          <message>Before continuing, please backup the Hive Metastore database referenced by the Hive Metastore service(s) located on the following host(s): {{hosts.all}}.</message>
+        </task>
+      </execute-stage>
+
+      <execute-stage service="OOZIE" component="OOZIE_SERVER" title="Pre Upgrade Oozie Backup">
+        <task xsi:type="manual">
+          <message>Before continuing, please backup the Oozie Server database referenced by the Oozie server located on {{hosts.all}}.</message>
+        </task>
+      </execute-stage>
+
+      <execute-stage service="RANGER" component="RANGER_ADMIN" title="Pre Upgrade Ranger Backup">
+        <task xsi:type="manual">
+          <message>Before continuing, please backup the Ranger Admin database and Ranger Audit database.
+                If audit database size is too large( > 3GB ) then follow the below instructions:
+                1. Backup the audit table from audit database.
+                2. Truncate audit table.
+                3. Follow upgrade process and once completed then restore audit data to audit table.</message>
+        </task>
+      </execute-stage>
+
+      <execute-stage service="RANGER_KMS" component="RANGER_KMS_SERVER" title="Pre Upgrade Ranger KMS Backup">
+        <task xsi:type="manual">
+          <message>Before continuing, please backup Ranger KMS database on the following host(s): {{hosts.all}}.</message>
+        </task>
+      </execute-stage>
+    </group>
+
+    <group name="ZOOKEEPER" title="ZooKeeper">
+      <supports-auto-skip-failure>false</supports-auto-skip-failure>
+      <service name="ZOOKEEPER">
+        <component>ZOOKEEPER_SERVER</component>
+      </service>
+    </group>
+
+    <group name="RANGER" title="Ranger">
+      <skippable>true</skippable>
+      <supports-auto-skip-failure>false</supports-auto-skip-failure>
+      <service name="RANGER">
+        <component>RANGER_ADMIN</component>
+        <component>RANGER_USERSYNC</component>
+      </service>
+    </group>
+
+    <group name="RANGER_KMS" title="Ranger_KMS">
+      <skippable>true</skippable>
+      <supports-auto-skip-failure>false</supports-auto-skip-failure>
+      <service name="RANGER_KMS">
+        <component>RANGER_KMS_SERVER</component>
+      </service>
+    </group>
+
+    <group name="KAFKA" title="Kafka">
+      <skippable>true</skippable>
+      <service name="KAFKA">
+        <component>KAFKA_BROKER</component>
+      </service>
+    </group>
+
+    <group name="HBASE" title="Update HBase Configuration">
+      <skippable>true</skippable>
+
+      <execute-stage service="HBASE" component="HBASE_MASTER" title="Update HBase Configuration">
+        <task xsi:type="server_action" class="org.apache.ambari.server.serveraction.upgrades.HBaseEnvMaxDirectMemorySizeAction">
+          <summary>Update HBase Env Configuration</summary>
+        </task>
+      </execute-stage>
+
+    </group>
+
+    <!-- This group should exist for all RUs that cross a major stack version. -->
+    <group xsi:type="cluster" name="UPDATE_CLIENT_CONFIGS" title="Update Client Configs">
+      <direction>UPGRADE</direction>
+      <execute-stage service="TEZ" component="TEZ_CLIENT" title="Update tez.lib.uris">
+        <task xsi:type="configure" id="hdp_2_5_0_0_tez_client_adjust_tez_lib_uris_property"/>
+      </execute-stage>
+
+      <execute-stage service="TEZ" component="TEZ_CLIENT" title="Verify LZO codec path for Tez">
+        <task xsi:type="server_action" class="org.apache.ambari.server.serveraction.upgrades.FixLzoCodecPath">
+          <summary>Verifying LZO codec path for Tez</summary>
+        </task>
+      </execute-stage>
+    </group>
+
+    <!-- This needs to be done for every Rolling Upgrade pack that changes configurations. -->
+    <group xsi:type="cluster" name="CONFIGURE_CLIENT_DEPENDENCIES" title="Write client configs">
+      <direction>UPGRADE</direction>
+      <skippable>true</skippable>
+      <supports-auto-skip-failure>false</supports-auto-skip-failure>
+
+      <execute-stage service="MAPREDUCE2" component="MAPREDUCE2_CLIENT" title="Write Mapreduce2 Client configs">
+        <task xsi:type="execute">
+          <script>scripts/mapreduce2_client.py</script>
+          <function>stack_upgrade_save_new_config</function>
+        </task>
+      </execute-stage>
+      <execute-stage service="TEZ" component="TEZ_CLIENT" title="Write Tez Client configs">
+        <task xsi:type="execute">
+          <script>scripts/tez_client.py</script>
+          <function>stack_upgrade_save_new_config</function>
+        </task>
+      </execute-stage>
+      <execute-stage service="SPARK" component="SPARK_CLIENT" title="Write Spark Client configs">
+        <task xsi:type="execute">
+          <script>scripts/spark_client.py</script>
+          <function>stack_upgrade_save_new_config</function>
+        </task>
+      </execute-stage>
+    </group>
+
+    <!--
+    After processing this group, the user-specified Kerberos descriptor will be updated to work with
+    the new stack-level Kerberos descriptor.
+    -->
+    <group xsi:type="cluster" name="UPDATE_KERBEROS_DESCRIPTORS" title="Update Kerberos Descriptors">
+      <execute-stage title="Update the user-specified Kerberos descriptor" service="" component="">
+        <task xsi:type="server_action" class="org.apache.ambari.server.serveraction.upgrades.UpgradeUserKerberosDescriptor"/>
+      </execute-stage>
+    </group>
+
+    <group name="CORE_MASTER" title="Core Masters">
+      <service-check>false</service-check>
+      <service name="HDFS">
+        <component>NAMENODE</component>
+        <component>JOURNALNODE</component>
+        <component>ZKFC</component>
+      </service>
+
+      <service name="MAPREDUCE2">
+        <component>HISTORYSERVER</component>
+      </service>
+
+      <service name="YARN">
+        <component>APP_TIMELINE_SERVER</component>
+        <component>RESOURCEMANAGER</component>
+      </service>
+
+      <service name="HBASE">
+        <component>HBASE_MASTER</component>
+      </service>
+    </group>
+
+    <group name="SERVICE_CHECK_1" title="All Service Checks" xsi:type="service-check">
+      <direction>UPGRADE</direction>
+      <skippable>true</skippable>
+      <priority>
+        <service>ZOOKEEPER</service>
+        <service>HDFS</service>
+        <service>YARN</service>
+        <service>MAPREDUCE2</service>
+        <service>HBASE</service>
+      </priority>
+      <exclude>
+        <service>AMBARI_METRICS</service>
+        <service>LOGSEARCH</service>
+      </exclude>
+    </group>
+
+    <group name="CORE_SLAVES" title="Core Slaves" xsi:type="colocated">
+      <service-check>false</service-check>
+      <skippable>true</skippable>
+      <service name="HDFS">
+        <component>DATANODE</component>
+        <component>NFS_GATEWAY</component>
+      </service>
+
+      <service name="HBASE">
+        <component>HBASE_REGIONSERVER</component>
+        <component>PHOENIX_QUERY_SERVER</component>
+      </service>
+
+      <service name="YARN">
+        <component>NODEMANAGER</component>
+      </service>
+
+      <batch>
+        <percent>20</percent>
+        <summary>Verification Required</summary>
+        <message>The initial batch of {{components}} hosts have been {{direction.past}}. You are advised to check the hosts and perform cluster/workload-specific tests against your cluster to ensure proper operation before proceeding with {{direction.text}} of the remaining services.</message>
+      </batch>
+    </group>
+
+    <group name="SERVICE_CHECK_2" title="All Service Checks" xsi:type="service-check">
+      <direction>UPGRADE</direction>
+      <skippable>true</skippable>
+      <priority>
+        <service>ZOOKEEPER</service>
+        <service>HDFS</service>
+        <service>YARN</service>
+        <service>HBASE</service>
+      </priority>
+      <exclude>
+        <service>AMBARI_METRICS</service>
+        <service>LOGSEARCH</service>
+      </exclude>
+    </group>
+
+    <group name="HIVE" title="Hive">
+      <skippable>true</skippable>
+      <supports-auto-skip-failure>false</supports-auto-skip-failure>
+      <service name="HIVE">
+        <component>HIVE_METASTORE</component>
+        <component>HIVE_SERVER</component>
+        <component>WEBHCAT_SERVER</component>
+      </service>
+    </group>
+
+    <group name="SPARK" title="Spark">
+      <skippable>true</skippable>
+      <supports-auto-skip-failure>false</supports-auto-skip-failure>
+      <service-check>false</service-check>
+      <service name="SPARK">
+        <component>SPARK_JOBHISTORYSERVER</component>
+        <component>SPARK_THRIFTSERVER</component>
+      </service>
+    </group>
+
+    <group name="SPARK_CLIENTS" title="Spark Clients">
+      <skippable>true</skippable>
+      <service name="SPARK">
+        <component>SPARK_CLIENT</component>
+      </service>
+    </group>
+
+    <group name="OOZIE" title="Oozie">
+      <skippable>true</skippable>
+      <supports-auto-skip-failure>false</supports-auto-skip-failure>
+      <service-check>false</service-check>
+      <service name="OOZIE">
+        <component>OOZIE_SERVER</component>
+      </service>
+    </group>
+
+    <group name="OOZIE_CLIENTS" title="Oozie Clients">
+      <skippable>true</skippable>
+      <service name="OOZIE">
+        <component>OOZIE_CLIENT</component>
+      </service>
+    </group>
+
+    <group name="FALCON" title="Falcon">
+      <skippable>true</skippable>
+      <supports-auto-skip-failure>false</supports-auto-skip-failure>
+      <service-check>false</service-check>
+      <service name="FALCON">
+        <component>FALCON_SERVER</component>
+      </service>
+    </group>
+
+    <group name="FALCON_CLIENTS" title="Falcon Clients">
+      <skippable>true</skippable>
+      <service name="FALCON">
+        <component>FALCON_CLIENT</component>
+      </service>
+    </group>
+
+    <group name="CLIENTS" title="Client Components">
+      <service-check>false</service-check>
+      <service name="ZOOKEEPER">
+        <component>ZOOKEEPER_CLIENT</component>
+      </service>
+
+      <service name="HDFS">
+        <component>HDFS_CLIENT</component>
+      </service>
+
+      <service name="YARN">
+        <component>YARN_CLIENT</component>
+      </service>
+
+      <service name="MAPREDUCE2">
+        <component>MAPREDUCE2_CLIENT</component>
+      </service>
+
+      <service name="TEZ">
+        <component>TEZ_CLIENT</component>
+      </service>
+
+      <service name="HBASE">
+        <component>HBASE_CLIENT</component>
+      </service>
+
+      <service name="PIG">
+        <component>PIG</component>
+      </service>
+
+      <service name="SQOOP">
+        <component>SQOOP</component>
+      </service>
+
+      <service name="MAHOUT">
+        <component>MAHOUT</component>
+      </service>
+
+      <service name="HIVE">
+        <component>HIVE_CLIENT</component>
+        <component>HCAT</component>
+      </service>
+    </group>
+
+    <group name="SERVICE_CHECK_3" title="All Service Checks" xsi:type="service-check">
+      <direction>UPGRADE</direction>
+      <skippable>true</skippable>
+      <priority>
+        <service>ZOOKEEPER</service>
+        <service>HDFS</service>
+        <service>YARN</service>
+        <service>HBASE</service>
+      </priority>
+      <exclude>
+        <service>AMBARI_METRICS</service>
+        <service>LOGSEARCH</service>
+      </exclude>
+    </group>
+
+    <group name="KNOX" title="Knox">
+      <skippable>true</skippable>
+      <service name="KNOX">
+        <component>KNOX_GATEWAY</component>
+      </service>
+    </group>
+
+    <!-- Storm package names changed causing an incompatibility between versions; we must
+    shut all daemons down before deleting ZooKeeper/local data. -->
+    <group xsi:type="cluster" name="STOP_STORM_WARNING" title="Deactivate Storm Topologies">
+      <direction>UPGRADE</direction>
+      <supports-auto-skip-failure>false</supports-auto-skip-failure>
+      <execute-stage service="STORM" component="NIMBUS" title="Deactivate Storm Topologies">
+        <task xsi:type="manual">
+          <message>Before continuing, please deactivate and kill any currently running topologies.</message>
+        </task>
+      </execute-stage>
+    </group>
+
+    <group xsi:type="stop" name="STOP_STORM" title="Stop Storm Services">
+      <direction>UPGRADE</direction>
+      <service-check>false</service-check>
+      <skippable>true</skippable>
+      <service name="STORM">
+        <component>NIMBUS</component>
+        <component>SUPERVISOR</component>
+        <component>STORM_UI_SERVER</component>
+        <component>DRPC_SERVER</component>
+      </service>
+    </group>
+
+    <group xsi:type="restart" name="RESTART_STORM" title="Restart Storm Services">
+      <skippable>true</skippable>
+      <service name="STORM">
+        <component>NIMBUS</component>
+        <component>SUPERVISOR</component>
+        <component>STORM_UI_SERVER</component>
+        <component>DRPC_SERVER</component>
+      </service>
+    </group>
+
+    <group xsi:type="stop" name="STOP_STORM" title="Stop Storm Services">
+      <direction>DOWNGRADE</direction>
+      <service-check>false</service-check>
+      <skippable>true</skippable>
+      <service name="STORM">
+        <component>NIMBUS</component>
+        <component>SUPERVISOR</component>
+        <component>STORM_UI_SERVER</component>
+        <component>DRPC_SERVER</component>
+      </service>
+    </group>
+
+    <group name="SLIDER" title="Slider">
+      <skippable>true</skippable>
+      <service name="SLIDER">
+        <component>SLIDER</component>
+      </service>
+    </group>
+
+    <group name="FLUME" title="Flume">
+      <skippable>true</skippable>
+      <service name="FLUME">
+        <component>FLUME_HANDLER</component>
+      </service>
+    </group>
+
+    <group name="ACCUMULO" title="Accumulo">
+      <skippable>true</skippable>
+      <service name="ACCUMULO">
+        <component>ACCUMULO_MASTER</component>
+        <component>ACCUMULO_TSERVER</component>
+        <component>ACCUMULO_MONITOR</component>
+        <component>ACCUMULO_GC</component>
+        <component>ACCUMULO_TRACER</component>
+        <component>ACCUMULO_CLIENT</component>
+      </service>
+    </group>
+
+    <group xsi:type="cluster" name="ALL_HOST_OPS" title="Finalize Hosts">
+      <execute-stage title="Update remaining HDP stack to {{version}}">
+        <task xsi:type="execute">
+          <script>scripts/ru_set_all.py</script>
+          <function>actionexecute</function>
+        </task>
+      </execute-stage>
+    </group>
+
+    <group xsi:type="cluster" name="FINALIZE_PRE_CHECK" title="Finalize {{direction.text.proper}} Pre-Check">
+      <direction>UPGRADE</direction>
+
+      <execute-stage title="Check Component Versions">
+        <task xsi:type="server_action" class="org.apache.ambari.server.serveraction.upgrades.ComponentVersionCheckAction" />
+      </execute-stage>
+    </group>
+
+    <group xsi:type="cluster" name="POST_CLUSTER" title="Finalize {{direction.text.proper}}">
+      <skippable>true</skippable>
+      <supports-auto-skip-failure>false</supports-auto-skip-failure>
+
+      <execute-stage title="Confirm Finalize">
+        <direction>UPGRADE</direction>
+        <task xsi:type="manual">
+          <message>Please confirm you are ready to finalize.</message>
+        </task>
+      </execute-stage>
+
+      <execute-stage service="RANGER" component="RANGER_ADMIN" title="Ranger Kerberos Keytab Check">
+        <task xsi:type="server_action" class="org.apache.ambari.server.serveraction.upgrades.KerberosKeytabsAction">
+          <summary>Ranger Kerberos Keytab Check</summary>
+          <message>Please follow below steps to complete upgrade in kerberos environment</message>
+          <message>-- If keytabs are managed by Ambari, Perform Regenerate Keytabs for missing components to get Ranger keytabs and restart Ranger components.</message>
+          <message>-- If keytabs are managed manually, create the required ranger keytabs in the locations specified in ranger config and restart Ranger components.</message>
+        </task>
+      </execute-stage>
+      
+      <execute-stage service="KAFKA" component="KAFKA_BROKER" title="Kafka Property Removal">
+        <task xsi:type="manual">
+          <message>Kafka Brokers have been upgraded with version compatability.</message>
+          <message>Config property "inter.broker.protocol.version" should be removed at your convenience.</message>
+          <message>Config property "log.message.format.version" should be removed when all clients have been upgraded.</message>
+        </task>
+      </execute-stage>
+
+      <execute-stage service="HDFS" component="NAMENODE" title="Execute HDFS Finalize">
+        <task xsi:type="execute" hosts="master">
+          <script>scripts/namenode.py</script>
+          <function>finalize_rolling_upgrade</function>
+        </task>
+      </execute-stage>
+
+      <execute-stage title="Save Cluster State" service="" component="">
+        <task xsi:type="server_action" class="org.apache.ambari.server.serveraction.upgrades.FinalizeUpgradeAction" />
+      </execute-stage>
+
+    </group>
+  </order>
+
+  <processing>
+    <service name="ZOOKEEPER">
+      <component name="ZOOKEEPER_SERVER">
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+
+      <component name="ZOOKEEPER_CLIENT">
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+    </service>
+
+    <service name="RANGER">
+      <component name="RANGER_ADMIN">
+        <pre-upgrade>
+          <task xsi:type="execute" hosts="all">
+            <summary>Stop Ranger Admin</summary>
+            <script>scripts/ranger_admin.py</script>
+            <function>stop</function>
+          </task>
+
+          <task xsi:type="configure" id="hdp_2_5_0_0_remove_audit_db_flag" />
+          <task xsi:type="configure" id="hdp_2_5_0_0_remove_audit_db_admin_properties" />
+          <task xsi:type="configure" id="hdp_2_5_0_0_remove_audit_db_ranger_admin_site" />
+          <task xsi:type="configure" id="hdp_2_5_0_0_remove_sso_property" />
+          <task xsi:type="configure" id="hdp_2_5_0_0_set_external_solrCloud_flag"/>
+
+          <task xsi:type="server_action" class="org.apache.ambari.server.serveraction.upgrades.RangerKerberosConfigCalculation">
+            <summary>Calculating Ranger Properties</summary>
+          </task>
+          <task xsi:type="server_action" class="org.apache.ambari.server.serveraction.upgrades.RangerWebAlertConfigAction">
+            <summary>Configuring Ranger Alerts</summary>
+          </task>
+
+          <task xsi:type="execute" hosts="all">
+            <script>scripts/ranger_admin.py</script>
+            <function>set_pre_start</function>
+          </task>
+
+          <task xsi:type="execute" hosts="any">
+            <summary>Upgrading Ranger database schema</summary>
+            <script>scripts/ranger_admin.py</script>
+            <function>setup_ranger_database</function>
+          </task>
+
+          <task xsi:type="configure_function" hosts="all" />
+
+          <task xsi:type="execute" hosts="any">
+            <summary>Applying Ranger java patches</summary>
+            <script>scripts/ranger_admin.py</script>
+            <function>setup_ranger_java_patches</function>
+          </task>
+        </pre-upgrade>
+
+        <pre-downgrade/> <!--  no-op to prevent config changes on downgrade -->
+
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+
+      </component>
+
+      <component name="RANGER_USERSYNC">
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+    </service>
+
+    <service name="RANGER_KMS">
+      <component name="RANGER_KMS_SERVER">
+        <pre-upgrade>
+          <task xsi:type="configure" id="hdp_2_5_0_0_remove_ranger_kms_audit_db" />
+
+          <task xsi:type="execute" hosts="any" sequential="true">
+            <summary>Upgrading Ranger KMS database schema</summary>
+            <script>scripts/kms_server.py</script>
+            <function>setup_ranger_kms_database</function>
+          </task>
+        </pre-upgrade>
+
+        <pre-downgrade>
+          <task xsi:type="execute" hosts="any" sequential="true">
+            <summary>Downgrading Ranger KMS database schema</summary>
+            <script>scripts/kms_server.py</script>
+            <function>setup_ranger_kms_database</function>
+          </task>
+        </pre-downgrade>
+
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+    </service>
+
+    <service name="HDFS">
+      <component name="NAMENODE">
+        <pre-upgrade>
+          <task xsi:type="configure" id="hdp_2_4_0_0_namenode_ha_adjustments"/>
+          <task xsi:type="configure" id="hdp_2_5_0_0_remove_ranger_hdfs_audit_db" />
+        </pre-upgrade>
+
+        <pre-downgrade /> <!--  no-op to prevent config changes on downgrade -->
+
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+
+      <component name="DATANODE">
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+
+      <component name="NFS_GATEWAY">
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+
+      <component name="HDFS_CLIENT">
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+
+      <component name="JOURNALNODE">
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+
+      <component name="ZKFC">
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+    </service>
+
+    <service name="MAPREDUCE2">
+      <component name="HISTORYSERVER">
+        <pre-downgrade /> <!--  no-op to prevent config changes on downgrade -->
+
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+
+      <component name="MAPREDUCE2_CLIENT">
+        <pre-upgrade>
+          <task xsi:type="server_action" class="org.apache.ambari.server.serveraction.upgrades.FixLzoCodecPath">
+            <summary>Verifying LZO codec path for mapreduce</summary>
+          </task>
+        </pre-upgrade>
+
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+    </service>
+
+    <service name="YARN">
+      <component name="APP_TIMELINE_SERVER">
+        <pre-downgrade /> <!--  no-op to prevent config changes on downgrade -->
+
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+
+      <component name="RESOURCEMANAGER">
+        <pre-upgrade>
+          <task xsi:type="server_action" class="org.apache.ambari.server.serveraction.upgrades.SparkShufflePropertyConfig">
+            <summary>Calculating Yarn Properties for Spark Shuffle</summary>
+          </task>
+          <task xsi:type="configure" id="hdp_2_5_0_0_remove_ranger_yarn_audit_db" />
+        </pre-upgrade>
+        <pre-downgrade /> <!--  no-op to prevent config changes on downgrade -->
+
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+
+      <component name="NODEMANAGER">
+        <pre-upgrade>
+          <task xsi:type="configure" id="hdp_2_5_0_0_add_spark2_yarn_shuffle"/>
+        </pre-upgrade>
+
+        <pre-downgrade/>
+
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+
+      <component name="YARN_CLIENT">
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+    </service>
+
+    <service name="HBASE">
+      <component name="HBASE_MASTER">
+        <pre-upgrade>
+          <!-- These HBASE configs changed in HDP 2.3.4.0, but Ambari can't distinguish HDP 2.3.2.0 vs HDP 2.3.4.0, so easier to always do them. -->
+          <task xsi:type="configure" id="hdp_2_4_0_0_hbase_remove_local_indexing"/>
+          <task xsi:type="configure" id="hdp_2_5_0_0_remove_ranger_hbase_audit_db" />
+        </pre-upgrade>
+
+        <pre-downgrade /> <!--  no-op to prevent config changes on downgrade -->
+
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+
+      <component name="HBASE_REGIONSERVER">
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+
+      <component name="HBASE_CLIENT">
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+
+      <component name="PHOENIX_QUERY_SERVER">
+        <upgrade>
+          <task xsi:type="restart-task"/>
+        </upgrade>
+      </component>
+    </service>
+
+    <service name="TEZ">
+      <component name="TEZ_CLIENT">
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+    </service>
+
+    <service name="PIG">
+      <component name="PIG">
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+    </service>
+
+    <service name="MAHOUT">
+      <component name="MAHOUT">
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+    </service>
+
+    <service name="SQOOP">
+      <component name="SQOOP">
+        <pre-upgrade>
+          <!-- Remove Atlas configs that were incorrectly added to sqoop-site instead of Atlas' application.properties. -->
+          <task xsi:type="configure" id="hdp_2_5_0_0_remove_sqoop_atlas_configs" />
+
+          <!-- If cluster is Kerberized, add configs to sqoop-atlas-application.properties,
+          which will be written to the local file system if Atlas is present. -->
+          <task xsi:type="configure" id="hdp_2_5_0_0_add_sqoop_atlas_security_configs" />
+        </pre-upgrade>
+
+        <pre-downgrade/> <!--  no-op to prevent config changes on downgrade -->
+
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+    </service>
+
+    <service name="HIVE">
+      <component name="HIVE_METASTORE">
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+
+      <component name="HIVE_SERVER">
+        <pre-upgrade>
+          <task xsi:type="configure" id="hdp_2_4_0_0_hive_server_configure_authentication"/>
+          <task xsi:type="configure" id="hdp_2_5_0_0_remove_ranger_hive_audit_db" />
+
+          <!-- Remove Atlas configs that were incorrectly added to hive-site instead of Atlas' application.properties. -->
+          <task xsi:type="configure" id="hdp_2_5_0_0_remove_hive_atlas_configs" />
+
+          <task xsi:type="server_action" class="org.apache.ambari.server.serveraction.upgrades.HiveEnvClasspathAction">
+            <summary>Update hive-env content</summary>
+          </task>
+        </pre-upgrade>
+
+        <pre-downgrade/>
+
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+
+      <component name="WEBHCAT_SERVER">
+        <pre-upgrade>
+          <task xsi:type="configure" id="hdp_2_5_0_0_webhcat_server_update_configuration_paths"/>
+        </pre-upgrade>
+
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+
+      <component name="HIVE_CLIENT">
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+
+      <component name="HCAT">
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+    </service>
+
+    <service name="SLIDER">
+      <component name="SLIDER">
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+    </service>
+
+    <service name="SPARK">
+      <component name="SPARK_JOBHISTORYSERVER">
+        <pre-upgrade>
+          <task xsi:type="configure" id="hdp_2_4_0_0_spark_jobhistoryserver"/>
+          <task xsi:type="configure" id="hdp_2_4_0_0_spark_java_opts"/>
+        </pre-upgrade>
+        
+        <pre-downgrade /> <!--  no-op to prevent config changes on downgrade -->
+        
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+      <component name="SPARK_THRIFTSERVER">
+        <pre-upgrade>
+          <task xsi:type="configure" id="hdp_2_4_0_0_spark_thriftserver"/>
+          <task xsi:type="configure" id="hdp_2_4_0_0_spark_java_opts"/>
+        </pre-upgrade>
+        
+        <pre-downgrade /> <!--  no-op to prevent config changes on downgrade -->
+        
+        <upgrade>
+          <task xsi:type="restart-task"/>
+        </upgrade>
+      </component>
+      <component name="SPARK_CLIENT">
+        <pre-upgrade>
+          <task xsi:type="configure" id="hdp_2_4_0_0_remove_spark_properties_extraJavaOptions"/>
+          <task xsi:type="configure" id="hdp_2_4_0_0_spark_java_opts"/>
+        </pre-upgrade>
+
+        <pre-downgrade /> <!--  no-op to prevent config changes on downgrade -->
+
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+    </service>
+
+    <service name="OOZIE">
+      <component name="OOZIE_SERVER">
+        <pre-upgrade>
+          <task xsi:type="configure" id="hdp_2_4_0_0_oozie_remove_service_classes" />
+
+          <task xsi:type="server_action" class="org.apache.ambari.server.serveraction.upgrades.OozieConfigCalculation">
+            <summary>Adjusting Oozie properties</summary>
+          </task>
+
+          <task xsi:type="execute" hosts="all" sequential="true">
+            <summary>Shut down all Oozie servers</summary>
+            <script>scripts/oozie_server.py</script>
+            <function>stop</function>
+          </task>
+
+          <!-- It is extremely important that both of these tasks run on the exact same host. Hence, pick the first alphabetically. -->
+          <task xsi:type="configure_function" hosts="first" />
+
+          <task xsi:type="execute" hosts="first" sequential="true">
+            <summary>Upgrading the Oozie database and creating a new sharelib</summary>
+            <script>scripts/oozie_server_upgrade.py</script>
+            <function>upgrade_oozie_database_and_sharelib</function>
+          </task>
+          <task xsi:type="server_action" class="org.apache.ambari.server.serveraction.upgrades.FixOozieAdminUsers">
+            <summary>Fixing Oozie admin users</summary>
+          </task>
+        </pre-upgrade>
+
+        <pre-downgrade>
+          <task xsi:type="execute" hosts="all" sequential="true">
+            <summary>Shut down all Oozie servers</summary>
+            <script>scripts/oozie_server.py</script>
+            <function>stop</function>
+          </task>
+
+          <task xsi:type="execute" hosts="any" sequential="true">
+            <summary>Create a new sharelib</summary>
+            <script>scripts/oozie_server_upgrade.py</script>
+            <function>create_sharelib</function>
+          </task>
+        </pre-downgrade>
+
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+
+      <component name="OOZIE_CLIENT">
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+    </service>
+
+    <service name="FALCON">
+      <component name="FALCON_SERVER">
+        <pre-upgrade>
+          <task xsi:type="configure" id="hdp_2_5_0_0_falcon_server_adjust_services_property"/>
+        </pre-upgrade>
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+      <component name="FALCON_CLIENT">
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+    </service>
+
+    <service name="KAFKA">
+      <component name="KAFKA_BROKER">
+        <pre-upgrade>
+          <task xsi:type="configure" id="hdp_2_5_0_0_remove_ranger_kafka_audit_db" />
+          <task xsi:type="configure" id="hdp_2_5_0_0_add_protocol_compatibility" />
+        </pre-upgrade>
+        
+        <pre-downgrade/>
+
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+    </service>
+
+    <service name="KNOX">
+      <component name="KNOX_GATEWAY">
+        <pre-upgrade>
+          <task xsi:type="configure" id="hdp_2_5_0_0_remove_ranger_knox_audit_db" />
+        </pre-upgrade>
+        
+        <pre-downgrade /> <!--  no-op to prevent config changes on downgrade -->
+
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+    </service>
+
+    <service name="STORM">
+      <component name="NIMBUS">
+        <pre-upgrade>
+          <task xsi:type="configure" id="hdp_2_5_0_0_remove_ranger_storm_audit_db" />
+          <task xsi:type="configure" id="hdp_2_5_0_0_upgrade_storm_1.0"/>
+
+          <!-- Remove Atlas configs that were incorrectly added to storm-site instead of Atlas' application.properties. -->
+          <task xsi:type="configure" id="hdp_2_5_0_0_remove_storm_atlas_configs" />
+
+          <task xsi:type="configure" id="hdp_2_3_0_0_remove_empty_storm_topology_submission_notifier_plugin_class"/>
+
+          <task xsi:type="configure" id="increase_storm_zookeeper_timeouts"/>
+
+          <task xsi:type="execute" hosts="any">
+            <summary>Removing Storm data from ZooKeeper</summary>
+            <script>scripts/storm_upgrade.py</script>
+            <function>delete_storm_zookeeper_data</function>
+          </task>
+
+          <task xsi:type="execute">
+            <summary>Removing local Storm data</summary>
+            <script>scripts/storm_upgrade.py</script>
+            <function>delete_storm_local_data</function>
+          </task>
+          <task xsi:type="configure" id="hdp_2_5_0_0_add_storm_security_configs" />
+        </pre-upgrade>
+
+        <pre-downgrade>
+          <task xsi:type="execute" hosts="any">
+            <summary>Removing Storm data from ZooKeeper</summary>
+            <script>scripts/storm_upgrade.py</script>
+            <function>delete_storm_zookeeper_data</function>
+          </task>
+
+          <task xsi:type="execute">
+            <summary>Removing local Storm data</summary>
+            <script>scripts/storm_upgrade.py</script>
+            <function>delete_storm_local_data</function>
+          </task>
+        </pre-downgrade>
+
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+
+      <component name="SUPERVISOR">
+        <pre-upgrade>
+          <task xsi:type="execute">
+            <summary>Removing local Storm data</summary>
+            <script>scripts/storm_upgrade.py</script>
+            <function>delete_storm_local_data</function>
+          </task>
+        </pre-upgrade>
+
+        <pre-downgrade>
+          <task xsi:type="execute">
+            <summary>Removing local Storm data</summary>
+            <script>scripts/storm_upgrade.py</script>
+            <function>delete_storm_local_data</function>
+          </task>
+        </pre-downgrade>
+
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+
+      <component name="STORM_UI_SERVER">
+        <pre-upgrade>
+          <task xsi:type="execute">
+            <summary>Removing local Storm data</summary>
+            <script>scripts/storm_upgrade.py</script>
+            <function>delete_storm_local_data</function>
+          </task>
+        </pre-upgrade>
+
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+
+      <component name="DRPC_SERVER">
+        <pre-upgrade>
+          <task xsi:type="execute">
+            <summary>Removing local Storm data</summary>
+            <script>scripts/storm_upgrade.py</script>
+            <function>delete_storm_local_data</function>
+          </task>
+        </pre-upgrade>
+
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+
+        <post-upgrade>
+          <task xsi:type="manual">
+            <message>Please rebuild your topology using the new Storm version dependencies and resubmit it using the newly created jar.</message>
+          </task>
+        </post-upgrade>
+      </component>
+    </service>
+
+    <service name="FLUME">
+      <component name="FLUME_HANDLER">
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+    </service>
+
+    <service name="ACCUMULO">
+      <component name="ACCUMULO_MASTER">
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+      <component name="ACCUMULO_MONITOR">
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+      <component name="ACCUMULO_GC">
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+      <component name="ACCUMULO_TRACER">
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+      <component name="ACCUMULO_TSERVER">
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+      <component name="ACCUMULO_CLIENT">
+        <upgrade>
+          <task xsi:type="restart-task" />
+        </upgrade>
+      </component>
+    </service>
+  </processing>
+</upgrade>


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