Impala
You can review the list of reported issues and their fixes for Impala in 7.3.1.100.
- CDPD-78366: Session management for Hue logins with Impala
- When logging into the Hue web UI, users occasionally encountered the
following
error:
The user authorized on the connection 'hue/gateway0.xyz.site@XYZ.SITE' does not match the session username 'hue/gateway1.xyz.site@XYZ.SITE'
This issue arised when a Hue user’s request was routed to a different Hue backend other than the one that initiated the original HS2 session with Impala. With Kerberos authentication, Impala restricts session reuse across different hosts or realms, even if the user remains the same.
- CDPD-78368: Executor crash during runtime filter generation
- Enabling the
MIN_MAXruntime filter in nested loop Joins for certain queries caused out-of-bounds access, leading to executor crashes that prevented any queries from running, disrupting production. - CDPD-78364: Impalad crash due to inconsistent tuple IDs during query execution
- Avoid impalad crash in
RowDescriptor::InitTupleIdxMap()by verifying tuple ids in descriptor table received in executor side.Apache Jira: IMPALA-13378
- CDPD-78170: Boolean literals in OR conditions are not simplified as expected
- Impala currently fails to simplify expressions like "id = 0 OR false" to "id = 0". The root cause is that the CompoundPredicate generated by NormalizeExprsRule is not analyzed, preventing SimplifyConditionalsRule from applying the expected rewrite.
- CDPD-78177: Conjunct registration issue during query rewrite in Impala
- This issue, introduced in version Cloudera Base on premises7.1.9, caused some queries with expressions
that could be rewritten to false to fail with an
IllegalStateException: Illegal reference to non-materialized slot - CDPD-78353: Failed table loads not retried after metastore recovery
- Tables failed to load when the metastore was down, and queries continued to fail even after the metastore was back up, requiring manual invalidation.
- CDPD-78175: Incorrect results due to predicate pushdown in join condition
- Impala can incorrectly push predicates to scan nodes, causing wrong results in some join scenarios. For example, a query that should return 0 rows may return incorrect results when specific predicates are used.
- CDPD-78351: Support x5c Parameter in JSON Web Keys (JWK)
- Impala coordinator failed to parse in JSON Web Key Set (JWK) and
failed to start the coordinator. This issue is now resolved.
Apache Jira: IMPALA-12559
- CDPD-78564: Partition value mismatch during INSERT event processing
- Impala failed to process some INSERT events due to partition value mismatches. Hive encodes partition strings in file paths using URL encoding, but partition strings in HMS events are not encoded. Impala mismatched partitions during HMS events processing by decoding them incorrectly, causing event processing failures.
- CDPD-78559: Prometheus metric name incompatibility with JDK11 and JDK17
- Impala metrics derived from JVM MemoryPoolMXBean names contain apostrophe characters in JDK11 and JDK17. Since Prometheus does not support apostrophes in metric names, these metrics cannot be consumed by Prometheus.
- CDPD-78161: Database deletion during metadata fetch
- Running SHOW DATABASES in Impala while simultaneously dropping a
database in Hive caused an
InconsistentMetadataFetchExceptiondue to missing database metadata. - CDPD-78164: Prevent Impala executor crash on restart
- Impala crashed when executors received queries with zero fragment instances due to network issues.
- CDPD-78363: DDL hangs with SYNC_DDL when Catalogd switches to standby
- When Catalogd changes from active to standby while waiting for SYNC_DDL version, it stops receiving catalog topic updates from the statestore. This caused DDL queries to hang indefinitely.
- CDPD-78365: Queries canceled after statestore failover
- Queries were canceled after a statestore failover due to temporary inconsistencies. While a grace period was already in place for statestore restarts, failovers were not handled the same way.
- CDPD-78563: Configurable TCP keepalive for client connections
- Client connections get lost without an explicit close due to machine resets, network disruptions, or load balancer idle timeouts, leading to resource leaks in Impala.
- CDPD-78162: Handling invalid column stats in table loading
- Tables with illegal column stats failed to load, preventing operations like DROP STATS or DROP TABLE.
