Hi Ravi, Gotcha! I just saw the error and immediately thought it was a host resolution error. Let me look into that. Can you share what version(s) of Drill, Hive and Hadoop you are using? THanks, -- C
> On Jul 14, 2020, at 4:42 PM, ravi kanth <[email protected]> wrote: > > Hi Charles, > > Thanks for responding. > > *hadoop-qa* is the nameservice our HA enabled Hadoop cluster uses and it's > not technically a server to have an IP rather a logical name. So, to your > question, unfortunately, I cannot change that to an IP. Although, if I try > to change that, Hive mappings in the metastore database for Hadoop paths > are all mapped with Hadoop Nameservice and not IP. > > From Hadoop docs, > > - > > *dfs.nameservices* - the logical name for this new nameservice > > Choose a logical name for this nameservice, for example “mycluster”, and > use this logical name for the value of this config option. The name you > choose is arbitrary. It will be used both for configuration and as the > authority component of absolute HDFS paths in the cluster. > > *Note:* If you are also using HDFS Federation, this configuration > setting should also include the list of other nameservices, HA or > otherwise, as a comma-separated list. > > <property> > <name>dfs.nameservices</name> > <value>mycluster</value> > </property> > > > > Is this something Drill support or tested? > > Thanks, > Ravi > > > On Tue, Jul 14, 2020 at 1:24 PM Charles Givre <[email protected]> wrote: > >> Could you try with the IP address of hadoop-qa and see if that works? >> -- C >> >>> On Jul 14, 2020, at 4:22 PM, ravi kanth <[email protected]> wrote: >>> >>> Hi Team, >>> >>> I have a Drill cluster with 4 nodes. I wanted to make use of the Drill >>> cluster to query a Hive Metastore Service which is built on top of HA >>> enabled HDFS cluster. >>> >>> As the Hadoop cluster is HA enabled the paths for the Hive tables >>> partitions are identified by a nameservice instead of a URL. >>> >>> In our case, HDFS Nameservice is hadoop-qa and so, are the HDFS partition >>> paths in Hive like "hdfs://hadoop-qa/dwh/data/tables/base_table/" >>> >>> Following is the storage-plugins-override.conf: >>> >>> "storage":{ >>> hive: { >>> type: "hive", >>> configProps: { >>> "hive.metastore.uris": "thrift://<host_name>:9083", >>> "hive.metastore.warehouse.dir": >>> "hdfs://hadoop-qa:8020/user/hive/warehouse", >>> "fs.default.name": "hdfs://hadoop-qa:8020", >>> "hive.metastore.sasl.enabled": "false", >>> }, >>> enabled: true >>> } >>> } >>> >>> When I try to query Hive using Drill, it fails to understand the >>> nameservice *hadoop-qa* and throws the following exception: >>> >>> >>> Error: SYSTEM ERROR: UnknownHostException: hadoop-qa >>> >>> Can someone suggest if the configurations are wrong? I followed the ones >> in >>> the documentation. Any help will be greatly appreciated. >>> >>> *We are trying to evaluate Drill for our Production facing analytical use >>> cases and this is a blocker for us in order to proceed with Drill.* >>> >>> Thanks, >>> Ravi >> >>
