[logback-user] Logback Threads Blocked: https://jira.qos.ch/browse/LOGBACK-1421?page=com.atlassian.jira.plugin.system.issuetabpanels%3Aall-tabpanel

[Prabhash Rathore]

Hello,

I have run into the same issue as documented in this Jira:
https://jira.qos.ch/browse/LOGBACK-1421?page=com.atlassian.jira.plugin.system.issuetabpanels%3Aall-tabpanel

I notice most application threads are blocked with following stack trace.
Looking at Jira, it seems fix for this was planned to be included as part
of 1.3.0-alpha6 but I didn't find this release tag on Logback Github repo.
Are there any plans to have a fix for this issue?

I see we run into issue under high load. We run Java 11 on Linux RHEL 7.

"ForkJoinPool.commonPool-worker-705" #29535 daemon prio=10 os_prio=0
cpu=11.37ms elapsed=343.90s tid=0x00007fd5dc197590 nid=0x2ad83 waiting for
monitor entry  [0x00007fccdadeb000]
   java.lang.Thread.State: BLOCKED (on object monitor)
        at
ch.qos.logback.core.util.CachingDateFormatter.format(CachingDateFormatter.java:45)
        - waiting to lock <0x000008206586ad18> (a
ch.qos.logback.core.util.CachingDateFormatter)
        at
ch.qos.logback.classic.pattern.DateConverter.convert(DateConverter.java:61)
        at
ch.qos.logback.classic.pattern.DateConverter.convert(DateConverter.java:23)
        at
ch.qos.logback.core.pattern.FormattingConverter.write(FormattingConverter.java:36)
        at
ch.qos.logback.core.pattern.PatternLayoutBase.writeLoopOnConverters(PatternLayoutBase.java:115)
        at
ch.qos.logback.classic.PatternLayout.doLayout(PatternLayout.java:141)
        at
ch.qos.logback.classic.PatternLayout.doLayout(PatternLayout.java:39)
        at
ch.qos.logback.core.encoder.LayoutWrappingEncoder.encode(LayoutWrappingEncoder.java:115)
        at
ch.qos.logback.core.OutputStreamAppender.subAppend(OutputStreamAppender.java:230)
        at
ch.qos.logback.core.rolling.RollingFileAppender.subAppend(RollingFileAppender.java:235)
        at
ch.qos.logback.core.OutputStreamAppender.append(OutputStreamAppender.java:102)
        at
ch.qos.logback.core.UnsynchronizedAppenderBase.doAppend(UnsynchronizedAppenderBase.java:84)
        at
ch.qos.logback.core.spi.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:51)
        at
ch.qos.logback.classic.Logger.appendLoopOnAppenders(Logger.java:270)
        at ch.qos.logback.classic.Logger.callAppenders(Logger.java:257)
        at
ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:421)
        at
ch.qos.logback.classic.Logger.filterAndLog_0_Or3Plus(Logger.java:383)
        at ch.qos.logback.classic.Logger.info(Logger.java:579)


Thank you for your help!
Prabhash Rathore
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