Issues

• log4j-slf4j-impl: LocationAwareLogger.log() bypasses configured MessageFactory

  apache/logging-log4j2#4403 · Filter by author fingthinking opened on Oct 14, 2026

• Instants before the epoch are formatted incorrectly

  waiting-for-maintainer
  apache/logging-log4j2#4399 · Filter by author sharanggupta opened on Oct 9, 2026
  1

• RollingFileManager keeps one non-daemon thread per appender after a rollover, so the JVM does not exit

  apache/logging-log4j2#4391 · Filter by author ramanathan1504 opened on Oct 6, 2026 · 2.26.2

• Cap the database appender buffer instead of discarding a failed batch

  apache/logging-log4j2#4369 · Filter by author ramanathan1504 opened on Sep 30, 2026

• OnStartupTriggeringPolicy rolls a file created by the same JVM when a second LoggerContext starts (2.25.2+)

  waiting-for-maintainer
  apache/logging-log4j2#4362 · Filter by author MartijnVisser opened on Sep 28, 2026
  1

• Async loggers silently discard events when the ring buffer is full and LMAX Disruptor 4 is used

  asyncbugjavawaiting-for-maintainer
  apache/logging-log4j2#4356 · Filter by author plusterkopp opened on Sep 25, 2026 · 2.26.2
  14

  

• HTTP appender drops the event when an evaluated header value contains a line break

  apache/logging-log4j2#4352 · Filter by author ppkarwasz opened on Sep 25, 2026 · 2.27.0

• Document that log4j2.enableJndiJms connects to the configured JNDI provider

  apache/logging-log4j2#4351 · Filter by author ppkarwasz opened on Sep 25, 2026 · 2.27.0
  2

  

• Cassandra appender does not verify the host name with useTls

  apache/logging-log4j2#4350 · Filter by author ppkarwasz opened on Sep 25, 2026
  1

• MapMessage default format does not escape values as RFC 5424 requires

  waiting-for-maintainer
  apache/logging-log4j2#4349 · Filter by author ppkarwasz opened on Sep 25, 2026
  1

• NullPointerException when a trust or key store location is set without a store type

  apache/logging-log4j2#4346 · Filter by author ppkarwasz opened on Sep 25, 2026 · 2.27.0

• JMS appender prints securityCredentials in status logger messages

  apache/logging-log4j2#4345 · Filter by author ppkarwasz opened on Sep 25, 2026
  2

• %m{html} silently drops the message

  waiting-for-maintainer
  apache/logging-log4j2#4344 · Filter by author ppkarwasz opened on Sep 25, 2026
  1

• ThrowableAttributeConverter does not round-trip exception messages containing line breaks

  apache/logging-log4j2#4343 · Filter by author ppkarwasz opened on Sep 25, 2026

• JndiManager shares one InitialContext between all callers, regardless of their JNDI environment

  apache/logging-log4j2#4339 · Filter by author ppkarwasz opened on Sep 22, 2026 · 2.27.0

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

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

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

  apache/logging-log4j2#4331 · Filter by author ppkarwasz opened on Sep 18, 2026 · 2.27.0
  1

• Syslog/Socket @ValidHost discards the appender on DNS miss at config load; reconnect never runs (Kubernetes late Service DNS; relates to LOG4J2-1047)

  waiting-for-maintainer
  apache/logging-log4j2#4309 · Filter by author kaushiksrinivas opened on Sep 8, 2026

• Missing ANSI Italic Style and Rendering Error in Underline Style

  buglayouts
  apache/logging-log4j2#4105 · Filter by author raphaelNguyen opened on Apr 23, 2026 · 2.x
  6

  

• Log messages appear to be trimmed when using PatternLayout %m%n

  bug
  apache/logging-log4j2#4088 · Filter by author veenaBOL opened on Mar 31, 2026
  5

  

• Make XInclude support in XML configuration opt-in for improved security hardening

  configurationenhancementwaiting-for-interestwaiting-for-maintainer
  apache/logging-log4j2#4064 · Filter by author ZeroXJacks opened on Mar 13, 2026 · 2.x

• Document StructuredDataMessage argument constraints

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

  

• Log4j pollutes downstream compile classpaths, for example making compilation slower

  apache/logging-log4j2#4034 · Filter by author Vampire opened on Jan 23, 2026
  9

  

• SslConfig is null when trying to capture logs using Syslog with TLS

  bugconfigurationlayouts
  apache/logging-log4j2#4026 · Filter by author Pariksit-Dogra opened on Jan 20, 2026 · 2.x
  2

  

• Deadlock when use TimeoutBlockingWaitStrategy

  asyncbugwaiting-for-maintainer
  apache/logging-log4j2#4009 · Filter by author cs-xiao opened on Dec 22, 2025
  2