Gary Gregory created LOG4J2-1046:
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Summary: Circular Exception cause throws StackOverflowError
Key: LOG4J2-1046
URL: https://issues.apache.org/jira/browse/LOG4J2-1046
Project: Log4j 2
Issue Type: Bug
Affects Versions: 2.1, 2.3
Reporter: Kenneth Gendron
If an exception with a circular-referenced exception (suppressed, or otherwise)
is logged, log4j will throw a StackOverflowError:
{code:java}
Exception e1 = new Exception();
Exception e2 = new Exception();
e2.addSuppressed(e1);
e1.addSuppressed(e2);
LoggerFactory.getLogger("root").error("Error", e1);
{code}
Will throw the following:
{code:java}
Exception in thread "main" java.lang.StackOverflowError
at java.util.HashMap.hash(HashMap.java:338)
at java.util.HashMap.get(HashMap.java:556)
at java.lang.ClassLoader.getPackage(ClassLoader.java:1608)
at java.lang.Package.getPackage(Package.java:334)
at java.lang.Class.getPackage(Class.java:783)
at
org.apache.logging.log4j.core.impl.ThrowableProxy.toCacheEntry(ThrowableProxy.java:495)
at
org.apache.logging.log4j.core.impl.ThrowableProxy.toExtendedStackTrace(ThrowableProxy.java:547)
at
org.apache.logging.log4j.core.impl.ThrowableProxy.<init>(ThrowableProxy.java:113)
at
org.apache.logging.log4j.core.impl.ThrowableProxy.toSuppressedProxies(ThrowableProxy.java:588)
at
org.apache.logging.log4j.core.impl.ThrowableProxy.<init>(ThrowableProxy.java:116)
at
org.apache.logging.log4j.core.impl.ThrowableProxy.toSuppressedProxies(ThrowableProxy.java:588)
{code}
A simple stack trace printout will produce the following:
{code:java}
java.lang.Exception
at NewClass.main(NewClass.java:95)
Suppressed: java.lang.Exception
at NewClass.main(NewClass.java:96)
[CIRCULAR REFERENCE:java.lang.Exception]
{code}
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