Apache Storm 2.6.0 Released

The Apache Storm community is pleased to announce that version 2.6.0 has been released and is available from the downloads page.

This release includes a number of code improvements and important bug fixes that improve Apache Storm's performance, stability and fault tolerance.

With Storm 2.6.0 we have removed the following external components / modules without a replacement:

• storm-cassandra
• storm-eventhubsgi
• storm-hbase
• storm-hive
• storm-kinesis
• storm-mongodb
• storm-mqtt
• storm-openmtsdb
• storm-pmml
• storm-pulsar
• storm-rocketmq
• storm-solr

We might consider re-adding specific components, if there is specific need and volunteers to maintain these components. In addition, this release drops Java 8 support.

We encourage users of previous versions to upgrade to this latest release.

Thanks

Special thanks are due to all those who have contributed to Apache Storm -- whether through direct code contributions, documentation, bug reports, or helping other users on the mailing lists. Your efforts are much appreciated.

Changes in this Release - Storm 2.6.0

JIRA issues addressed in the 2.6.0 release of Storm. Documentation for this release is available at the Apache Storm project site.

New Feature

• [STORM-1241] - port backtype.storm.security.auth.auto-login-module-test to java
• [STORM-1316] - port storm.trident.state-test to java
• [STORM-3901] - Upgrade Kryo from version 4 to version 5.4.0
• [STORM-3958] - Capacity to set Storm UI's title in conf/storm.yaml

Improvement

• [STORM-3762] - Set a default character set in InputStreamReader to solve potential garbled problems
• [STORM-3764] - Nimbus has internal scheduling errors when backtracking
• [STORM-3771] - Execute doCleanup in its own timer thread without lock
• [STORM-3782] - Refactor KafkaOffsetMetric to use V2 metrics
• [STORM-3792] - Change pom.xml to use more test JVM threads without reuse
• [STORM-3800] - Fix Resocue leak due to Files.list and Files.walk
• [STORM-3825] - update libthrift due to security vulnerability
• [STORM-3845] - Upgrade activemq version from 5.15.3 to 5.18.2
• [STORM-3888] - HdfsBlobStoreFile set wrong permission for file
• [STORM-3914] - Several External Modules as not being tested for JDK 11
• [STORM-3919] - Upgrade Hadoop to version 3 (+ depending frameworks: Hive, HBase)
• [STORM-3948] - Hive 2.3.9 declares an offline / unmaintained maven repository
• [STORM-3980] - Updates developer docs and removing obsolete content
• [STORM-3983] - Refactor File.createTempFile with Files.create(...)
• [STORM-4003] - storm-kafka-monitor fails with Java 17 runtime, missing jakarta.xml.bind dependency

Bug

• [STORM-3404] - storm v1.2.2 KafkaOffsetLagUtil cant pull the offset correctly
• [STORM-3924] - Support for declaring WorkerHook in Flux topology definitions
• [STORM-3944] - ConcurrentModificationException in MultiCountMetric
• [STORM-3954] - Remove Logback pulled in by Zookeeper
• [STORM-3956] - Fix cli monitor component's argument type
• [STORM-3984] - Nimbus failover causes unnecessary reassign if 600s are passed after starting Nimbus
• [STORM-3994] - LocalCluster init fails on Windows because of missing librocksdbjni-win64.dll

Task

• [STORM-3932] - Fix errors/warnings found while generating javadoc in storm-client
• [STORM-3933] - Fix errors/warnings found while generating javadoc in storm-server
• [STORM-3935] - Fix errors/warnings found while generating javadoc in storm-cassandra
• [STORM-3936] - Fix errors/warnings found while generating javadoc in storm-kafka-client
• [STORM-3937] - Fix errors/warnings found while generating javadoc in storm-starter
• [STORM-3939] - Remove JDK 8 support
• [STORM-3941] - Add .asf.yaml to GitHub repository
• [STORM-3945] - Upgrade Zookeeper to 3.9.0 / Curator 5
• [STORM-3953] - Update RELEASING.md
• [STORM-3955] - Dependabot recommended update to maven-core
• [STORM-3963] - Import and Build Apache Storm in Eclipse
• [STORM-3965] - Remove illegal access warning in JDK11 test of storm-sql-core
• [STORM-3967] - Set generated sources directory for use by IDE like eclipse
• [STORM-3968] - Add missing groupId in storm-core/pom.xml for maven-dependency-plugin
• [STORM-3970] - storm-sql-core in fails to build Eclipse for generated java code
• [STORM-3978] - Rep,ace json-simple with minidev json
• [STORM-3988] - Removal of modules residing in /external
• [STORM-3999] - Add Java 21 to Build Matrix
• [STORM-4001] - log4j2 2.21.1

Dependency upgrade

• [STORM-3884] - Bump calcite-core from 1.14.0 to 1.32.0
• [STORM-3885] - Security fix upgrade com.fasterxml.jackson.core:jackson-databind to 2.15.2
• [STORM-3946] - Upgrade Netty BOM
• [STORM-3947] - Align Netty with version used in Zookeeper
• [STORM-3949] - libthrift 0.18.1
• [STORM-3950] - Modernize storm-jdbc
• [STORM-3961] - Modernize Storm UI's 3rd party dependencies
• [STORM-3972] - commons-lang3 3.13.0
• [STORM-3973] - log4j2 2.20.0
• [STORM-3974] - Jersey 2.40
• [STORM-3975] - Dropwizard 1.3.29
• [STORM-3976] - j2html 1.6.0
• [STORM-3977] - Minidev JSON 2.5.0
• [STORM-3979] - JUnit 5.10.0
• [STORM-3986] - Get rid of BlacklistScheduler timer [INFO] logs
• [STORM-3987] - Zookeeper 3.9.1
• [STORM-3989] - Snappy Java 1.1.10.4
• [STORM-3990] - Hadoop 2.10.2
• [STORM-3991] - Avro 1.11.3
• [STORM-3993] - ActiveMQ 5.18.3
• [STORM-3995] - commons-text 1.11.0
• [STORM-3996] - Jetty 9.4.53.v20231009
• [STORM-3997] - Netty 4.1.100
• [STORM-3998] - Guava 32.1.3-jre

Documentation

• [STORM-3982] - Update README.md, DOAP/RDF and Dev section in POM

Requirement

• [STORM-3840] - log4j vulnerability