Oozie and Hue: why am I getting "permission denied" error while playing oozie workflow?

Question

I'm new to Hue and Oozie. I installed a Cloudera 5 cluster, with Hue. I logged in on Hue as Thomas, and created an Oozie dashboard that runs just a hive script. But, when I launch the dashboard, I get the following error claiming that is not possible to write on inode /tmp/hadoop-yarn:

2015-06-12 13:36:01,014  WARN ActionStartXCommand:523 - SERVER[cdh-master] USER[thomas] GROUP[-] TOKEN[] APP[My_Workflow] JOB[0000000-150612132534763-oozie-oozi-W] ACTION[0000000-150612132534763-oozie-oozi-W@hive2-3283] Error starting action [hive2-3283]. ErrorType [TRANSIENT], ErrorCode [JA009], Message [JA009: Permission denied: user=thomas, access=WRITE, inode="/tmp/hadoop-yarn":yarn:hadoop:drwxr-xr-x
at org.apache.hadoop.hdfs.server.namenode.DefaultAuthorizationProvider.checkFsPermission(DefaultAuthorizationProvider.java:257)
at org.apache.hadoop.hdfs.server.namenode.DefaultAuthorizationProvider.check(DefaultAuthorizationProvider.java:238)
at org.apache.hadoop.hdfs.server.namenode.DefaultAuthorizationProvider.check(DefaultAuthorizationProvider.java:216)

I made some search on stackoverflow and so, and already add the following lines:

• on HADOOP_HOME/hadoop-conf/core-site.xml: <property> <name>hadoop.proxyuser.thomas.groups</name> <value>*</value> </property> <property> <name>hadoop.proxyuser.thomas.hosts</name> <value>*</value> </property>
• On OOZIE_HOME/oozie-site.xml: <property> <name>oozie.service.ProxyUserService.proxyuser.thomas.hosts</name> <value>*</value> </property> <property> <name>oozie.service.ProxyUserService.proxyuser.thomas.groups</name> <value>*</value> </property>

It does not seem to have any effects. Does anyone has an idea ?

Thx

Answer 1

I manage to find a solution, but I don't feel satisfied: I changed the rights of the directory "/tmp/hadoop-yarn" to 777. This way, everyone can write into it. This can be done this way:

sudo -u hdfs hadoop -fs chmod 777 /tmp/hadoop-yarn

Does anyone has a better idea?