Impala 2.5.0 - 1606 Release Notes

Below are release notes for the Impala component included in the MapR Distribution for Apache Hadoop.

Version 2.5.0
Release Date June 30, 2016
MapR Version Interoperability Works with MapR version 5.1.0 and later. See Impala Support Matrix and Ecosystem Support Matrix (Pre-5.2 releases).
Source on GitHub
Release Tag 2.5.0-mapr-1606
Hive Support 1.2
HBase Support 1.1.1
Package Names

See Package Names for MapR Ecosystem Packs (MEPs) if you are running 5.2 and install MEP 1.1.1, MEP 2.0, or any subsequent MEP release:

The following packages are associated with Impala 2.5.0 - 1606 if you are running 5.1 and you install Impala from the repository, or if you are running 5.2 and install MEP 1.0.0 or 1.1.0:

  • mapr-impala-
  • mapr-impala-statestore-
  • mapr-impala-server-
  • mapr-impala-catalog-

New in this Release

This release of Impala includes new features and behavior changes that are specific to MapR. See New Features in Impala 2.5.0 for MapR for a full list and descriptions of new features and behaviors.

Fixed Issue

The performance issue tracked by IMPALA-1755 is now resolved.


This release by MapR includes the following patches. For complete details, refer to the commit log for this project in GitHub.

Commit Date (YYYY-MM-DD) Comment
fc0b0aa2 2016-05-20 [IMPALA-3375] Improve TopN performance with a trivial Compare object.
0d3bd54f 2016-05-20 [IMPALA-2548] Codegen Tuple::MaterializeExprs() and use in TopN node.
75a048e 2016-05-20 [IMPALA-3385] Fix crashes on accessing error_log.
8ce0ce6 2016-05-20 [IMPALA-2076] Correct execution time tracking for DataStreamSender.
4605ee4 2016-05-20 [IMPALA-2399] Check for mem limit in allocations in parquet scanner and decompressor.
9ce2136 2016-05-20 [IMPALA-3141] Send dummy filters when filter production is disabled.
8a6dfa0d 2016-05-20 [IMPALA-3395] Old HT filter code uses wrong expr type.
5d134fb7 2016-05-20 [IMPALA-3270] & [IMPALA-3237] Improve handling of unsupported data types.
0a09b2a 2016-05-20 [IMPALA-3194] Allow queries materializing scalar type columns in RC/sequence files.
99896f6a 2016-05-20 [IMPALA-1928] Fix Thrift client transport wrapping order.