Is it necessary to maintain certain order inside oozie action content? - hadoop

Question

When i tried to run oozie hive action with the following code
<action name="Hive-Node">
<hive xmlns="uri:oozie:hive-action:0.2">
<job-tracker>${jobTracker}</job-tracker>
<name-node>${nameNode}</name-node>
<job-xml>hive-site.xml</job-xml>
<prepare>
<mkdir path="${nameNode}/hive/output"/>
</prepare>
<configuration>
<property>
<name>mapred.job.queue.name</name>
<value>${queueName}</value>
</property>
<property>
<name>hive.insert.into.multilevel.dirs</name>
<value>true</value>
</property>
<property>
<name>hbase.zookeeper.quorum</name>
<value>${hbaseZooQuorum}</value>
</property>
</configuration>
<script>${HIVE_QUERY_FILE}</script>
</hive>
<ok to="End" />
<error to="Fail" />
</action>
I got the following error:
Error: E0701 : E0701: XML schema error, cvc-complex-type.2.4.a: Invalid content was found starting with element 'prepare'. One of '{"uri:oozie:hive-action:0.2":configuration, "uri:oozie:hive-action:0.2":script}' is expected.
But after I modified the order of declaring tags inside hive action i.e moved <job-xml>...</job-xml> after <prepare>...</prepare>, it works fine.
Is it necessary to follow those order(s) inside oozie actions ?

Answer 1

From the Oozie Hive Action Documentation,
The schema uses,
<xs:sequence>
<xs:element name="job-tracker" type="xs:string" minOccurs="1" maxOccurs="1"/>
<xs:element name="name-node" type="xs:string" minOccurs="1" maxOccurs="1"/>
<xs:element name="prepare" type="hive:PREPARE" minOccurs="0" maxOccurs="1"/>
<xs:element name="job-xml" type="xs:string" minOccurs="0" maxOccurs="1"/>
<xs:element name="configuration" type="hive:CONFIGURATION" minOccurs="0" maxOccurs="1"/>
<xs:element name="script" type="xs:string" minOccurs="1" maxOccurs="1"/>
<xs:element name="param" type="xs:string" minOccurs="0" maxOccurs="unbounded"/>
<xs:element name="file" type="xs:string" minOccurs="0" maxOccurs="unbounded"/>
<xs:element name="archive" type="xs:string" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
the element xs:sequence which as per W3Schools,
The sequence element specifies that the child elements must appear in
a sequence. Each child element can occur from 0 to any number of
times.
And we can see as per the schema for Hive-Action <prepare> comes before <job-xml> in sequence