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https://issues.apache.org/jira/browse/LOG4J2-3077?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17324961#comment-17324961
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Lőrinc Pap commented on LOG4J2-3077:
------------------------------------
We can't easily reproduce it and can't debug it at all.
The thread where we're logging is
[https://github.com/ratpack/ratpack/blob/a711e67905c7076aacf2d26add46a2a128ebadd1/ratpack-core/src/main/java/ratpack/core/server/internal/DefaultRatpackServer.java#L152-L162,]
i.e. inside a shutdown hook, possibly after a timeout exception.
> StackOverflowError on exception during logging
> ----------------------------------------------
>
> Key: LOG4J2-3077
> URL: https://issues.apache.org/jira/browse/LOG4J2-3077
> Project: Log4j 2
> Issue Type: Bug
> Components: SLF4J Bridge
> Affects Versions: 2.14.1
> Reporter: Lőrinc Pap
> Priority: Major
>
> Sometimes we're getting the following logs:
> {code:java}
> Exception in thread "ratpack-shutdown-thread" java.lang.StackOverflowError
> at
> org.apache.logging.log4j.spi.AbstractLogger.getRecursionDepthHolder(AbstractLogger.java:2166)
> at
> org.apache.logging.log4j.spi.AbstractLogger.decrementRecursionDepth(AbstractLogger.java:2178)
> at
> org.apache.logging.log4j.spi.AbstractLogger.logMessageTrackRecursion(AbstractLogger.java:2161)
> at
> org.apache.logging.log4j.spi.AbstractLogger.logMessageSafely(AbstractLogger.java:2142)
> at
> org.apache.logging.log4j.spi.AbstractLogger.logMessage(AbstractLogger.java:2017)
> at
> org.apache.logging.log4j.spi.AbstractLogger.logIfEnabled(AbstractLogger.java:1983)
> at
> org.apache.logging.log4j.spi.AbstractLogger.warn(AbstractLogger.java:2676)
> at
> org.apache.logging.log4j.spi.AbstractLogger.handleLogMessageException(AbstractLogger.java:2235)
> at
> org.apache.logging.log4j.spi.AbstractLogger.tryLogMessage(AbstractLogger.java:2208)
> ...{code}
> and
> {code:java}
> Exception in thread "ratpack-shutdown-thread" java.lang.OutOfMemoryError:
> Java heap space
> at java.util.Arrays.copyOf(Unknown Source)
> at java.lang.AbstractStringBuilder.ensureCapacityInternal(Unknown
> Source)
> at java.lang.AbstractStringBuilder.append(Unknown Source)
> at java.lang.StringBuilder.append(Unknown Source)
> at
> org.apache.logging.log4j.spi.AbstractLogger.handleLogMessageException(AbstractLogger.java:2234)
> at
> org.apache.logging.log4j.spi.AbstractLogger.tryLogMessage(AbstractLogger.java:2208)
> at
> org.apache.logging.log4j.spi.AbstractLogger.logMessageTrackRecursion(AbstractLogger.java:2159)
> at
> org.apache.logging.log4j.spi.AbstractLogger.logMessageSafely(AbstractLogger.java:2142)
> at
> org.apache.logging.log4j.spi.AbstractLogger.logMessage(AbstractLogger.java:2017)
> at
> org.apache.logging.log4j.spi.AbstractLogger.logIfEnabled(AbstractLogger.java:1983)
> at
> org.apache.logging.log4j.spi.AbstractLogger.warn(AbstractLogger.java:2676)
> at
> org.apache.logging.log4j.spi.AbstractLogger.handleLogMessageException(AbstractLogger.java:2235)
> {code}
> We suspect it's an infinite loop caused by throwing an exception why another
> exception is being handled.
> Upgrading from 2.14.0 to 2.14.1 didn't help.
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