[jira] [Commented] (LOG4J2-1914) AsyncLogger and message formatting (ConcurrentModificationException)

["Leon Finker (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LOG4J2-1914?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16104393#comment-16104393 ] 

Leon Finker commented on LOG4J2-1914:
-------------------------------------

Sorry, I missed this comment/request. The app code was fixed since then.
I'll try to reproduce it and post back. Thank you




> AsyncLogger and message formatting (ConcurrentModificationException)
> --------------------------------------------------------------------
>
>                 Key: LOG4J2-1914
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-1914
>             Project: Log4j 2
>          Issue Type: Bug
>    Affects Versions: 2.7
>            Reporter: Leon Finker
>
> Hi,
> The docs specify that the default for log4j.format.msg.async is false. But we still got the following log4j2 AsyncLogger processing exception. Does it mean that message formatting is async or maybe async up to 2.7 only? Or is this something else?  Thank you
> 2017-05-18 08:02:44,570 Log4j2-TF-3-AsyncLoggerConfig-2 ERROR An exception occurred processing Appender AppLogFile java.util.ConcurrentModificationException
>                 at java.util.HashMap$HashIterator.nextNode(Unknown Source)
>                 at java.util.HashMap$EntryIterator.next(Unknown Source)
>                 at java.util.HashMap$EntryIterator.next(Unknown Source)
>                 at org.apache.logging.log4j.message.ParameterFormatter.appendMap(ParameterFormatter.java:569)
>                 at org.apache.logging.log4j.message.ParameterFormatter.appendPotentiallyRecursiveValue(ParameterFormatter.java:505)
>                 at org.apache.logging.log4j.message.ParameterFormatter.recursiveDeepToString(ParameterFormatter.java:432)
>                 at org.apache.logging.log4j.message.ParameterFormatter.formatMessage2(ParameterFormatter.java:189)
>                 at org.apache.logging.log4j.message.ParameterizedMessage.formatTo(ParameterizedMessage.java:225)
>                 at org.apache.logging.log4j.core.pattern.MessagePatternConverter.format(MessagePatternConverter.java:117)
>                 at org.apache.logging.log4j.core.pattern.PatternFormatter.format(PatternFormatter.java:38)
>                 at org.apache.logging.log4j.core.layout.PatternLayout$PatternSerializer.toSerializable(PatternLayout.java:294)
>                 at org.apache.logging.log4j.core.layout.PatternLayout.toText(PatternLayout.java:195)
>                 at org.apache.logging.log4j.core.layout.PatternLayout.encode(PatternLayout.java:180)
>                 at org.apache.logging.log4j.core.layout.PatternLayout.encode(PatternLayout.java:57)
>                 at org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.directEncodeEvent(AbstractOutputStreamAppender.java:176)
>                 at org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.tryAppend(AbstractOutputStreamAppender.java:169)
>                 at org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.append(AbstractOutputStreamAppender.java:160)
>                 at org.apache.logging.log4j.core.appender.RollingRandomAccessFileAppender.append(RollingRandomAccessFileAppender.java:104)
>                 at org.apache.logging.log4j.core.config.AppenderControl.tryCallAppender(AppenderControl.java:156)
>                 at org.apache.logging.log4j.core.config.AppenderControl.callAppender0(AppenderControl.java:129)
>                 at org.apache.logging.log4j.core.config.AppenderControl.callAppenderPreventRecursion(AppenderControl.java:120)
>                 at org.apache.logging.log4j.core.config.AppenderControl.callAppender(AppenderControl.java:84)
>                 at org.apache.logging.log4j.core.config.LoggerConfig.callAppenders(LoggerConfig.java:447)
>                 at org.apache.logging.log4j.core.async.AsyncLoggerConfig.asyncCallAppenders(AsyncLoggerConfig.java:114)
>                 at org.apache.logging.log4j.core.async.AsyncLoggerConfigDisruptor$Log4jEventWrapperHandler.onEvent(AsyncLoggerConfigDisruptor.java:112)
>                 at org.apache.logging.log4j.core.async.AsyncLoggerConfigDisruptor$Log4jEventWrapperHandler.onEvent(AsyncLoggerConfigDisruptor.java:98)
>                 at com.lmax.disruptor.BatchEventProcessor.run(BatchEventProcessor.java:129)
>                 at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
>                 at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
>                 at java.lang.Thread.run(Unknown Source)



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