Hawkular - Hawkular Metrics 0.24.0

I am happy to announce release 0.24.0 of Hawkular Metrics. This release is anchored by a new tag query language and general stability improvements.

Here is a list of major changes:

Tag Query Language
- A query language was added to support complex constructs for tag based queries for metrics
- The old tag query syntax is deprecated but can still be used; the new syntax takes precedence
- The new syntax supports:
  - logical operators: AND,OR
  - equality operators: =, !=
  - value in array operators: IN, NOT IN
  - existential conditions:
    - tag without any operator is equivalent to = '*'
    - tag preceded by the NOT operator matches only instances without the tag defined
  - all the values in between single quotes are treated as regex expressions
  - simple text values do not need single quotes
  - spaces before and after equality operators are not necessary
- For more details please see: Pull Request 725, HWKMETRICS-523
- Sample queries:

a1 = 'bcd' OR a2 != 'efg'
a1='bcd' OR a2!='efg'
a1 = efg AND ( a2 = 'hijk' OR a2 = 'xyz' )
a1 = 'efg' AND ( a2 IN ['hijk', 'xyz'] )
a1 = 'efg' AND a2 NOT IN ['hijk']
a1 = 'd' OR ( a1 != 'ab' AND ( c1 = '*' ) )
a1 OR a2
NOT a1 AND a2
a1 = 'a' AND NOT b2
a1 = a AND NOT b2

Performance
- Updated compaction strategies for data tables from size tiered compaction (STCS) to time window compaction (TWCS) (HWKMETRICS-556)
- Jobs now execute on RxJava's I/O scheduler thread pool
  (HWKMETRICS-579)
Administration
- The admin tenant is now configurable via ADMIN_TENANT environment variable (HWKMETRICS-572)
- Internal metric collection is disabled by default (HWKMETRICS-578)
- Resolved a null pointer exception in DropWizardReporter due to admin tenant changes (HWKMETRICS-577)
Job Scheduler
- Resolved an issue where the compression job would stop running after a few days (HWKMETRICS-564)
- Updated the job scheduler to renew job locks during job execution (HWKMETRICS-570)
- Updated the job scheduler to reacquire job lock after server restarts (HWKMETRICS-583)
Hawkular Alerting - Major Updates
- Resolved several issues where schema upgrades were not applied after the initial schema install (HWKALERTS-220, HWKALERTS-222)

Hawkular Alerting - Included

Version 1.5.1
Project details and repository: Github
Documentation: REST API, Examples, Developer Guide

Hawkular Metrics Clients

Release Links

Github Release: https://github.com/hawkular/hawkular-metrics/releases/tag/0.24.0
JBoss Nexus Maven artifacts: http://origin-repository.jboss.org/nexus/content/repositories/public/org/hawkular/metrics/
Jira release tracker: https://issues.jboss.org/projects/HWKMETRICS/versions/12332966

A big "Thank you" goes to John Sanda, Matt Wringe, Michael Burman, Joel Takvorian, Jay Shaughnessy, Lucas Ponce, and Heiko Rupp for their project contributions.

Published by Stefan Negrea on 08 February 2017

Hawkular Metrics 0.24.0 - Release

Release Links