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Updated on 2022-08-16 GMT+08:00
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The name of a node must reflect the functions of a node
Standard name:
<action name="copyData"> <fs> <delete path='${nameNode}/user/result'/> <mkdir path='${nameNode}/user/result'/> <move source='${nameNode}/output-data/map-reduce' target='${nameNode}/user/result'/> <chmod path='${nameNode}/user/result' permissions='-rwxrw-rw-' dir-files='true'></chmod> </fs> <ok to="end"/> <error to="fail"/> </action>
Non-standard name:
<action name="fsNode"> <fs> <delete path='${nameNode}/user/result'/> <mkdir path='${nameNode}/user/result'/> <move source='${nameNode}/output-data/map-reduce' target='${nameNode}/user/result'/> <chmod path='${nameNode}/user/result' permissions='-rwxrw-rw-' dir-files='true'></chmod> </fs> <ok to="end"/> <error to="fail"/> </action>
Configure pre-cleanup operations under Prepare for a task involving data overwriting
Correct:
<workflow-app name="foo-wf" xmlns="uri:oozie:workflow:0.1"> ... <action name="myfirstHadoopJob"> <map-reduce> <resource-manager>foo:8021</resource-manager> <name-node>bar:8020</name-node> <prepare> <delete path="hdfs://foo:8020/usr/tucu/output-data"/> </prepare> <job-xml>/myfirstjob.xml</job-xml> <configuration> <property> <name>mapred.input.dir</name> <value>/usr/tucu/input-data</value> </property> <property> <name>mapred.output.dir</name> <value>/usr/tucu/input-data</value> </property> <property> <name>mapred.reduce.tasks</name> <value>${firstJobReducers}</value> </property> <property> <name>oozie.action.external.stats.write</name> <value>true</value> </property> </configuration> </map-reduce> <ok to="myNextAction"/> <error to="errorCleanup"/> </action> ... </workflow-app>
Parent topic: Oozie
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