2. Stopping HDP Services

Before performing any upgrades or uninstalling software, stop all of the Hadoop services in the following order:

Knox
Oozie
WebHCat
HiveServer2
Hive Metastore
HBase
YARN
HDFS
Zookeeper
Storm
Kafka

Instructions

Stop Knox. Execute the following command on the Knox host machine.
```
su -l knox -c "/usr/hdp/current/knox-server/bin/gateway.sh stop"
```
Stop Oozie. Execute the following command on the Oozie host machine.
```
su -l oozie -c "/usr/hdp/current/oozie-server/bin/oozied.sh stop"
```

Stop WebHCat. On the WebHCat host machine, execute the following command:

su -l hcat -c "/usr/hdp/current/hive-webhcat/sbin/webhcat_server.sh stop"

Stop Hive. Execute this command on the Hive Metastore and Hive Server2 host machine.

ps aux | awk '{print $1,$2}' | grep hive | awk '{print $2}' | xargs kill >/dev/null 2>&1

Stop HBase

Execute this command on all RegionServers:

su -l hbase -c "/usr/hdp/current/hbase-regionserver/bin/hbase-daemon.sh stop regionserver"

Execute this command on the HBase Master host machine:

su -l hbase -c "/usr/hdp/current/hbase-master/bin/hbase-daemon.sh stop master"

Stop YARN

Execute this command on all NodeManagers:

su -l yarn -c "/usr/hdp/current/hadoop-yarn-nodemanager/sbin/yarn-daemon.sh stop nodemanager"

Execute this command on the History Server host machine:

su -l yarn -c "/usr/hdp/current/hadoop-mapreduce-historyserver/sbin/mr-jobhistory-daemon.sh stop historyserver"

Execute this command on the ResourceManager host machine(s):

su -l yarn -c "/usr/hdp/current/hadoop-yarn-resourcemanager/sbin/yarn-daemon.sh stop resourcemanager"

Stop HDFS
- Execute this command on all DataNodes:
```
su -l hdfs -c "/usr/hdp/current/hadoop-hdfs-datanode/../hadoop/sbin/hadoop-daemon.sh stop datanode"
```
- If you are not running NameNode HA (High Availability), stop the Secondary NameNode by executing this command on the Secondary NameNode host machine:
```
su -l hdfs -c "/usr/hdp/current/hadoop-hdfs-namenode/../hadoop/sbin/hadoop-daemon.sh stop secondarynamenode"
```
- Execute this command on the NameNode host machine(s):
```
su -l hdfs -c "/usr/hdp/current/hadoop-hdfs-namenode/../hadoop/sbin/hadoop-daemon.sh stop namenode"
```
- If you are running NameNode HA, stop the Zookeeper Failover Controllers (ZKFC) by executing this command on the NameNode host machines:
```
su -l hdfs -c "/usr/hdp/current/hadoop-hdfs-namenode/../hadoop/sbin/hadoop-daemon.sh stop zkfc"
```
- If you are running NameNode HA, stop the JournalNodes by executing these commands on the JournalNode host machines:
```
su $HDFS_USER 
/usr/hdp/current/hadoop-hdfs-journalnode/../hadoop/sbin/hadoop-daemon.sh stop journalnode
```
  where $HDFS_USER is the HDFS user. For example, hdfs.

Stop ZooKeeper. Execute this command on the ZooKeeper host machine(s):

su - zookeeper -c "export ZOOCFGDIR=/usr/hdp/current/zookeeper-server/conf ; export ZOOCFG=zoo.cfg; source /usr/hdp/current/zookeeper-server/conf/zookeeper-env.sh ; /usr/hdp/current/zookeeper-server/bin/zkServer.sh stop"

Start Storm services using a process controller, such as supervisord. See Installing and Configuring Apache Storm. For example, to stop the storm-nimbus service:
```
sudo /usr/bin/supervisorctl
storm-drpc RUNNING pid 9801, uptime 0:03:20
storm-nimbus RUNNING pid 9802, uptime 0:03:20
storm-ui RUNNING pid 9800, uptime 0:03:20
supervisor> stop storm-nimbus
storm-nimbus: stopped
```
where $STORM_USER is the operating system user that installed Storm. For example, storm.
Stop Kafka. Execute this command on the Kafka host machine(s):
```
su $KAFKA_USER
/usr/hdp/current/kafka-broker/bin/kafka stop
```
where$KAFKA_USER is the operating system user that installed Kafka. For example,kafka.

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