2.27.0

Issues

• Add Support for Custom Headers in SMTP Appender

  appendersenhancementpriority: P3
  Feature

  apache/logging-log4j2#3704 · Filter by author ppkarwasz opened on Jun 1, 2025 · 2.27.0
  15

  

• Make XInclude processing in XML configurations opt-in

  configurationenhancementjavaport-to-mainvy
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  apache/logging-log4j2#4158·ppkarwasz opened Jun 26, 2026 · Updated Nov 7, 2026·1/3
  1

• Migrate log4j-core-test to JUnit 5 and remove unused JUnit 4 rules

  breaking changejavaport-to-maintests
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  apache/logging-log4j2#4326·ramanathan1504 opened Sep 17, 2026 · Updated Nov 7, 2026

• Document StructuredDataMessage argument constraints

  documentationpriority: P3
  apache/logging-log4j2#4051 · Filter by author ppkarwasz opened on Feb 25, 2026 · 2.27.0
  2

  

• Reject MapMessage keys that collide with NoSQL provider reserved field names

  appendersenhancementpriority: P3waiting-for-maintainer
  apache/logging-log4j2#4331 · Filter by author ppkarwasz opened on Sep 18, 2026 · 2.27.0
  6

  

• Fail closed when a KeyStore or TrustStore element of Ssl cannot be loaded

  bugconfigurationpriority: P2
  apache/logging-log4j2#4332 · Filter by author ppkarwasz opened on Sep 18, 2026 · 2.27.0
  1

• Add JUnit 5 SecurityManagerExtension to log4j-api-test

  apijavaminor API changeport-donetests
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  apache/logging-log4j2#4427·ramanathan1504 opened Oct 25, 2026 · Updated Nov 7, 2026

• Clarify web application shutdown listener configuration

  documentationport-done
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  apache/logging-log4j2#4408·Shekharrajak opened Oct 18, 2026 · Updated Nov 6, 2026
  4

• HandlingNoSQL reserved fields

  apibugjavaminor API changeport-to-main
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  apache/logging-log4j2#4411·Shekharrajak opened Oct 19, 2026 · Updated Nov 6, 2026
  13

• Add fuzz targets for syslog, GELF and structured-data layouts

  javalayoutsport-donetests
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  apache/logging-log4j2#4424·vindeckyy opened Oct 24, 2026 · Updated Nov 6, 2026
  2

• Add escaping test for HtmlLayout

  javalayoutsport-to-maintests
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  apache/logging-log4j2#4422·fizzbeom opened Oct 23, 2026 · Updated Nov 6, 2026
  1

• Move JSpecify from provided to compile scope

  builddependencies
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  apache/logging-log4j2#3228·ppkarwasz opened Nov 22, 2024 · Updated Nov 7, 2026
  12

  

• Fixes in dev docs

  documentationport-to-main
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  apache/logging-log4j2#3333·grobmeier opened Dec 26, 2024 · Updated Nov 7, 2026
  14

• Modernise RollingRandomAppenderDirectWriteAndSwitchDirectoryTest

  appenders:Rollingjavaport-to-maintests
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  apache/logging-log4j2#3468·ppkarwasz opened Feb 16, 2025 · Updated Nov 7, 2026
  1

• docs: Improve String concatenation best practice

  documentationport-to-main
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  apache/logging-log4j2#3553·ppkarwasz opened Mar 19, 2025 · Updated Nov 7, 2026
  1

• Update pattern logger precision example and description

  documentationport-to-main
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  apache/logging-log4j2#3588·cretzbach opened Apr 4, 2025 · Updated Nov 7, 2026
  1

• Use lookup tables for StatusLogger property names

  apienhancementjavaperformanceport-donewaiting-for-user
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  apache/logging-log4j2#3719·kamilkrzywanski opened Jun 6, 2025 · Updated Nov 7, 2026
  2

  

• Respect log4j1.compatibility for programmatic configuration

  bugjavalegacy-1.2-bridgeport-done
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  apache/logging-log4j2#3812·jhl221123 opened Jul 9, 2025 · Updated Nov 7, 2026
  1

• Add org.apache.logging.log4j.core.appender.FileManager.getPath()

  appendersenhancementjavaminor API changeport-to-main
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  apache/logging-log4j2#3855·garydgregory opened Jul 23, 2025 · Updated Nov 7, 2026
  11

• Fix sizing of Maps

  javaperformanceport-to-main
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  apache/logging-log4j2#3868·kilink opened Aug 1, 2025 · Updated Nov 7, 2026
  17

• Update StructuredDataMessage Javadoc for RFC 5424 compliance

  apidocumentationjavaport-done
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  apache/logging-log4j2#4103·DrDrunkenstien-10 opened Apr 21, 2026 · Updated Nov 7, 2026
  9

• Consolidate string-to-URI conversion in NetUtils.toURI

  configurationenhancementjavaport-to-main
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  apache/logging-log4j2#4160·ppkarwasz opened Jun 27, 2026 · Updated Nov 7, 2026
  4

• Strip CR/LF from SMTP subjects derived from event data

  appendersbugjavaport-to-mainvy
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  apache/logging-log4j2#4258·shaggyinsomniac opened Aug 27, 2026 · Updated Nov 7, 2026
  2

• Custom header for smtp appender

  appendersenhancementjavaminor API changeport-to-mainvy
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  apache/logging-log4j2#4267·ramanathan1504 opened Aug 30, 2026 · Updated Nov 7, 2026
  1

• Stop boxing a Long per cache miss in the instant formatting cache

  enhancementjavalayoutsperformanceport-to-mainvy
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  apache/logging-log4j2#4322·Myllyenko opened Sep 13, 2026 · Updated Nov 7, 2026
  1