Logger class is not serializable #1884
Description
Description
Since 2.21.0 serializing a Logger raises java.io.NotSerializableException.
Maybe this is caused by this commit (see my comment on commit): e86d28b
Configuration
Version: 2.21.0
Operating system: Windows-10
JDK: OpenJDK 1.8.0_382
Logs
Exception in thread "main" java.io.NotSerializableException: java.lang.ThreadLocal at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1184) at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548) at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509) at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178) at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548) at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509) at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348) at test.TestSerializeLogger.main(TestSerializeLogger.java:14) Reproduction
package test; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.ObjectOutputStream; import org.apache.logging.log4j.LogManager; import org.apache.logging.log4j.Logger; @SuppressWarnings("javadoc") public class TestSerializeLogger { public static void main(final String... args) throws IOException { try (ObjectOutputStream objOut = new ObjectOutputStream(new ByteArrayOutputStream())) { Logger logger = LogManager.getLogger("Test"); objOut.writeObject(logger); } } }