Note:
https://builds.apache.org/job/Log4j%202.x/1400/org.apache.logging.log4j$log4j-flume-ng/testReport/org.apache.logging.log4j.flume.appender/FlumePersistentAppenderTest/testMultipleConcurrent/

I imagine this is just a timing issue?

Gary

On Sun, Sep 20, 2015 at 7:04 PM, Ralph Goers <[email protected]>
wrote:

> This is a vote to release Log4j 2.4, the next version of the Log4j 2
> project.
>
> Please download, test, and cast your votes on the log4j developers list.
> [] +1, release the artifacts
> [] -1, don't release because...
>
> The vote will remain open for 72 hours (or more if required). All
> votes are welcome, but only Logging PMC votes are “officially” counted. As
> always, at least 3 +1 votes and more positive than negative votes are
> required.
>
> Changes in this version include:
>
>
> New features:
>
> o LOG4J2-635:  Add support for configuration via Properties.
>
> o LOG4J2-952:  Add ConfigurationBuilder.
>
> o LOG4J2-599:  Added support for Java 8 lambda expressions to lazily
> construct a log message only if
>
>               the requested log level is enabled.
>
> o LOG4J2-1118:  Updated Logger wrapper generator tool to add Java 8 lambda
> support for custom log levels.
>
> o LOG4J2-1107:  New Appender for Apache Kafka. Thanks to Mikael Ståldal.
>
> o LOG4J2-1113:  New publisher Appender for ZeroMQ (using JeroMQ). Thanks
> to Gary Gregory.
>
> o LOG4J2-1088:  Add Comma Separated Value (CSV) layouts for parameter and
> event logging. Thanks to Gary Gregory.
>
> o LOG4J2-1090:  Add Core Configurator APIs to change a logger's level.
>
> o LOG4J2-1105:  Add API org.apache.logging.log4j.Level.isInRange(Level,
> Level). Thanks to Gary Gregory.
>
> o LOG4J2-1106:  Add a LevelRangeFilter class. Thanks to Gary Gregory.
>
> o LOG4J2-1076:  Added support for system nanosecond time in pattern layout.
>
> o LOG4J2-1075:  Added support for compressing to bzip2 format on file
> rollover.
>
> o LOG4J2-1077:  Support additional Apache Commons Compress compression
> formats on rollover: Deflate, Pack200, XY.
>
> o LOG4J2-767:  New module for Liquibase integration. Thanks to Mikael
> Ståldal.
>
> o LOG4J2-1023:  New RewritePolicy for changing level of a log event.
> Thanks to Mikael Ståldal.
>
> o LOG4J2-1015:  Add a way to route messages based on the %marker in Layout
> for RoutingAppender. Thanks to Daniel Marcotte.
>
> o LOG4J2-1050:  Add a Log4jLookup class to help write log files relative
> to log4j2.xml. Thanks to Adam Retter.
>
> o LOG4J2-1057:  Add API
> org.apache.logging.log4j.LogManager.getFormatterLogger().
>
> o LOG4J2-1066:  Expose Log4jContextFactory's ShutdownCallbackRegistry.
> Thanks to Charles Allen.
>
>
> Fixed Bugs:
>
> o LOG4J2-1121:  Fixed potential race condition on reconfiguration.
> Introduced ReliabilityStrategy to facilitate
>
>         switching between different mechanisms for preventing log events
> from being dropped on reconfiguration.
>
> o LOG4J2-1123:  Core Configurator.initialize(String, ClassLoader, String)
> fails to work when config location is a file path. Thanks to Gary Gregory.
>
> o LOG4J2-1117:  OutputStreamManager in ConsoleAppender leaking managers.
> Thanks to Marcus Thiesen.
>
> o LOG4J2-1044:  Write pending events to Flume when the appender is stopped.
>
> o LOG4J2-1108:  NullPointerException when passing null to
> java.util.logging.Logger.setLevel(). Thanks to Mikael Ståldal.
>
> o LOG4J2-1110:  org.apache.logging.log4j.jul.CoreLogger.setLevel() checks
> for security permission too late.
>
> o LOG4J2-1084:  Misleading StatusLogger WARN event in LogManager with
> java.util.Map. Thanks to Philipp Schneider.
>
> o LOG4J2-1051:  NoClassDefFoundError when starting app on Google App
> Engine. Thanks to Lukasz Lenart.
>
> o LOG4J2-684:  ExtendedThrowablePatternConverter does not print suppressed
> exceptions. Thanks to Joern Huxhorn, Mauro Molinari.
>
> o LOG4J2-1069:  Improper handling of JSON escape chars when deserializing
> JSON log events. Thanks to Sam Braam.
>
> o LOG4J2-1068:  Exceptions not logged when using TcpSocketServer +
> SerializedLayout. Thanks to Andy McMullan.
>
> o LOG4J2-1067:  ThrowableProxy getExtendedStackTraceAsString throws NPE on
> deserialized nested exceptions. Thanks to Sam Braam.
>
> o LOG4J2-1049:  AsyncAppender now resets the thread interrupted flag after
> catching InterruptedException. Thanks to Robert Schaft.
>
> o LOG4J2-1048:  FileConfigurationMonitor unnecessarily calls
> System.currentTimeMillis() causing high CPU usage. Thanks to Nikhil.
>
> o LOG4J2-1037:  Backward compatibility issue in log4j-1.2-api NDC pop()
> and peek(). Thanks to Marc Dergacz.
>
> o LOG4J2-1025:  Custom java.util.logging.Level gives null Log4j Level and
> causes NPE. Thanks to Mikael Ståldal.
>
> o LOG4J2-1033:  SimpleLogger creates unnecessary Map objects by calling
> ThreadContext.getContext() instead of getImmutableContext(). Thanks to
> Mikael Ståldal.
>
> o LOG4J2-1026:  HighlightConverter does not obey noConsoleNoAnsi.
>
> o LOG4J2-1019:  ZipCompressAction leaves files open until GC when an IO
> error takes place.
>
> o LOG4J2-1020:  GzCompressAction leaves files open until GC when an IO
> error takes place.
>
> o LOG4J2-1038:  Incorrect documentation for layout default charset. Thanks
> to Gili.
>
> o LOG4J2-1042:  Socket and Syslog appenders don't take timeout into
> account at startup. Thanks to Guillaume Turri.
>
> o LOG4J2-934:  Circular suppressed Exception throws StackOverflowError.
> Thanks to Kenneth Gendron.
>
> o LOG4J2-1046:  Circular Exception cause throws StackOverflowError. Thanks
> to Kenneth Gendron.
>
> o LOG4J2-982:  Use System.nanoTime() to measure time intervals. Thanks to
> Mikhail Mazurskiy.
>
> o LOG4J2-1045:  Externalize log4j2.xml via URL resource. Thanks to Günter
> Albrecht.
>
> o LOG4J2-1058:  Log4jMarker#contains(String) does not respect
> org.slf4j.Marker contract. Thanks to Daniel Branzea.
>
> o LOG4J2-1060:  Log4jMarker#contains(Marker) does not respect
> org.slf4j.Marker contract.
>
> o LOG4J2-1061:  Log4jMarker#remove(Marker) does not respect
> org.slf4j.Marker contract.
>
> o LOG4J2-1062:  Log4jMarker#add(Marker) does not respect org.slf4j.Marker
> contract.
>
> o LOG4J2-1064:  org.apache.logging.slf4j.Log4jMarker does not implement
> org.slf4j.Marker.equals(Object) org.slf4j.Marker.hashCode().
>
> o LOG4J2-889:  Header in layout should not be written on application
> startup if appending to an existing file. Fixes LOG4J2-1030. Thanks to
> Maciej Karaś, Kenneth Leider.
>
> o LOG4J2-918:  Clarify documentation for combining async with sync loggers.
>
> o LOG4J2-1078:  GelfLayout throws exception if some log event fields are
> null. Thanks to Mikael Ståldal.
>
>
> Changes:
>
> o LOG4J2-1017:  Update Java platform from Java 6 to 7. From this version
> onwards, log4j 2 requires Java 7.
>
> o LOG4J2-812:  PatternLayout timestamp formatting performance improvement:
> replaced synchronized SimpleDateFormat with
>
>         Apache Commons FastDateFormat. This and better caching resulted in
> a ~3-30X faster timestamp formatting.
>
> o LOG4J2-1097:  PatternLayout timestamp formatting performance
> improvement: predefined date formats (and variants using
>
>         a period '.' millisecond separator instead of ',') are now
> formatted ~2-10X faster than other date formats.
>
> o LOG4J2-1096:  Improved performance of
> ParameterizedMessage::getFormattedMessage by ~2X.
>
> o LOG4J2-1120:  LoggerConfig performance improvements: avoid unnecessary
> lock acquisition, use more efficient data structure.
>
> o LOG4J2-1125:  PatternLayout performance improvement by caching and
> reusing a ThreadLocal StringBuilder.
>
> o LOG4J2-1114:  Add thread name to status logger layout.
>
> o LOG4J2-1010:  Pass log event when interpolating logger properties.
>
> o LOG4J2-1044:  Support batchSize in FlumeAvroManager.
>
> o LOG4J2-1065:  Define org.apache.logging.log4j.Marker.equals(Object) and
> org.apache.logging.log4j.Marker.hashCode().
>
> o LOG4J2-1063:  Avoid creating temporary array object in
> org.apache.logging.slf4j.Log4jMarker.iterator().
>
> o LOG4J2-890:  log4j-web-2.1 should workaround a bug in JBOSS EAP 6.2.
> Thanks to Hassan Kalaldeh, Robert Andersson, Remko Popma.
>
> o LOG4J2-403:  MongoDB appender, username and password should be optional.
> Thanks to Poorna Subhash P, Jeremy Lautman.
>
> o LOG4J2-1035:  Log4j2 tries to SystemClassLoader when running on Google
> AppEngine.
>
> o LOG4J2-1022:  Allow a list of keys to be specified in the MDC pattern
> converter.
>
> o LOG4J2-959:  Fix FindBugs DM_DEFAULT_ENCODING bug in
> SimpleLogger.logMessage() and simplify code.
>
> o LOG4J2-1036:  Update Apache Flume from 1.5.2 to 1.6.0.
>
> o LOG4J2-1041:  Update MongoDB driver from 2.11.2 to 2.13.2.
>
> o LOG4J2-1018:  Update database tests from H2 1.3.175 to 1.3.176.
>
> o LOG4J2-1070:  Update Java Mail from 1.5.2 to 1.5.4.
>
> o LOG4J2-1079:  Update Jackson from 2.5.3 to 2.5.4.
>
> o LOG4J2-1879:  Update Jackson from 2.5.4 to 2.6.0.
>
> o LOG4J2-1092:  Update Jackson from 2.6.0 to 2.6.1.
>
> o LOG4J2-1104:  Update Apache Commons Compress from 1.9 to 1.10.
>
>
> Removed:
>
> o Removed experimental interface LevelLogger which got committed to master
> by mistake.
>
> Tag:https://
> <https://git-wip-us.apache.org/repos/asf?p=logging-log4j2.git;a=tree;h=380e13cd7ab965942f1d5cfabd73dd056d728b28;hb=383a8194acab4a740d22b69c023ca3af6cb9c664>
> git-wip-us.apache.org/repos/asf?p=logging-log4j2.git;a=tree;h=380e13cd7ab965942f1d5cfabd73dd056d728b28;hb=383a8194acab4a740d22b69c023ca3af6cb9c664
>  or
>
> a)  for a new copy do "git clone 
> https://git-wip-us.apache.org/repos/asf/logging-log4j2.git"; and then "git 
> checkout tags/log4j-2.4"
> b) for an existing working copy to “git pull” and then “git checkout 
> tags/log4j-2.4”
>
> Web Site: http://people.apache.org/~rgoers/log4j2/
>
> Artifacts: 
> https://repository.apache.org/content/repositories/orgapachelogging-1015
>
> You may download all the artifacts by executing:
>
> wget -e robots=off --cut-dirs=7 -nH -r -p -np --no-check-certificate 
> https://repository.apache.org/content/repositories/orgapachelogging-1015/org/apache/logging/log4j/
>
> Ralph
>
>
>
>
>
>


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