[LOG4J2-3077] StackOverflowError on exception during logging

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.14.1
• Component/s: SLF4J Bridge
• Assignee: Unassigned
• Reporter: Lőrinc Pap
• Created: 19/Apr/21 06:58
• Updated: 04/May/21 15:18

Description

Sometimes we're getting the following logs:

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)
...

and

 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)

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.