Known Issues in Apache Hive

Learn about the known issues in Hive, the impact or changes to the functionality, and the workaround.

CDPD-66549: Cloudera Machine Learning failed to connect to Hive Metastore during an upgrade

Hive Metastore (HMS) becomes unreachable during and after an upgrade from Cloudera Runtime 7.2.17 to higher versions.

Clients communicate with HMS using delegation tokens and these tokens that are required during a connection, is stored in memory. After an upgrade, all issued tokens are lost when the HMS restarts, and as a result the handshake communication using the old token is unsuccessful. If you set the HMS Delegtaion Token Store to DBTokenStore, HMS will persist the tokens in the backend database. The tokens can then be retrieved after an upgrade since it is stored ensuring that the handshake communication using the old token is successful.

Perform the following steps to configure the HMS Delegation Token Store:

1. In Cloudera Manager, click Clusters > HIVE > Configuration
2. Search for the hive.cluster.delegtaion.token.store.class property and set the value to org.apache.hadoop.hive.thrift.DBTokenStore
3. Restart the Hive service for the changes to take effect.

CDPD-54988: Disallow creation of Temporary Hive Iceberg tables

Atlas by default skips ingesting temporary tables created in Hive. But when searched for the newly created temporary Hive tables, it displays them in the search results.

CDPD-15518: ACID tables you write using the Hive Warehouse Connector cannot be read from an Impala virtual warehouse.

Read the tables from a Hive virtual warehouse or using Impala queries in Data Hub.

CDPD-13636: Hive job fails with OutOfMemory exception in the Azure DE cluster

Set the parameter hive.optimize.sort.dynamic.partition.threshold=0. Add this parameter in Cloudera Manager (Hive Service Advanced Configuration Snippet (Safety Valve) for hive-site.xml)

ENGESC-2214: Hiveserver2 and HMS service logs are not deleted

Update Hive log4j configurations. Hive -> Configuration -> HiveServer2 Logging Advanced Configuration Snippet (Safety Valve) Hive Metastore -> Configuration -> Hive Metastore Server Logging Advanced Configuration Snippet (Safety Valve) Add the following to the configurations: appender.DRFA.strategy.action.type=DELETE appender.DRFA.strategy.action.basepath=${log.dir} appender.DRFA.strategy.action.maxdepth=1 appender.DRFA.strategy.action.PathConditions.glob=${log.file}.* appender.DRFA.strategy.action.PathConditions.type=IfFileName appender.DRFA.strategy.action.PathConditions.nestedConditions.type=IfAccumulatedFileCount appender.DRFA.strategy.action.PathConditions.nestedConditions.exceeds=same value as appender.DRFA.strategy.max

CDPD-10848: HiveServer Web UI displays incorrect data

If you enabled auto-TLS for TLS encryption, the HiveServer2 Web UI does not display the correct data in the following tables: Active Sessions, Open Queries, Last Max n Closed Queries

CDPD-11890: Hive on Tez cannot run certain queries on tables stored in encryption zones

This problem occurs when the Hadoop Key Management Server (KMS) connection is SSL-encrypted and a self signed certificate is used. SSLHandshakeException might appear in Hive logs.

Use one of the workarounds:

• Install a self signed SSL certificate into cacerts file on all hosts.
• Copy ssl-client.xml to a directory that is available in all hosts. In Cloudera Manager, in Clusters > Hive on Tez > Configuration. In Hive Service Advanced Configuration Snippet for hive-site.xml, click +, and add the name tez.aux.uris and valuepath-to-ssl-client.xml.