How does UIF work with Impala ?

gnaldi62

Hi,

we have an installation with UIF enabled. For all other activities impersonification on Hadoop works fine, but it seems that this is not the case of Impala. We have run a query with a user but looking at the logs in Cloudera Manager the same query is run by the DSSUSER and not by the end user.

Is that the expected beahiour ?

Thanks. Rgds.

Giuseppe

JordanB

Hi @gnaldi62
,

That is expected if you have not explicitly passed additional impersonation info: a DelegationUID must be passed and its value should be the user Impala is supposed to impersonate while running the query. You should use the value provided by DSS, that is ${hadoopUser} and append it to the connection URL (i.e. ;DelegationUID=${hadoopUser})

Please see the following related ticket: https://community.dataiku.com/t5/Using-Dataiku/Different-delegationUID-for-every-user-in-JDBC-connections/m-p/2949

Thanks!

Jordan