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Published Jul. 2, 2025

Trace about Reflection.getCallerClass is not supported when executing Patching Tool

Written By

David Tello

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Issue

  • When you try to use the Patching Tool (for example, the command patchingtool.sh info), you get an error similar to the following: 
    2021-07-16 06:41:48,143 INFO sun.reflect.Reflection.getCallerClass is not supported. ReflectionUtil.getCallerClass will be much slower due to this. java.lang.ClassNotFoundException: sun.reflect.Reflection
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:583)
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
    at java.base/java.lang.Class.forName0(Native Method)
    at java.base/java.lang.Class.forName(Class.java:315)
    at org.apache.logging.log4j.util.LoaderUtil.loadClass(Unknown Source)
    at org.apache.logging.log4j.util.ReflectionUtil.<clinit>(Unknown Source)
    at org.apache.logging.log4j.core.impl.ThrowableProxy.<init>(Unknown Source)
    at org.apache.logging.log4j.core.impl.Log4jLogEvent.getThrownProxy(Unknown Source)
    at org.apache.logging.log4j.core.pattern.ExtendedThrowablePatternConverter.format(Unknown Source)
    at org.apache.logging.log4j.core.pattern.PatternFormatter.format(Unknown Source)
    at org.apache.logging.log4j.core.layout.PatternLayout.toSerializable(Unknown Source)
    at org.apache.logging.log4j.core.layout.PatternLayout.toSerializable(Unknown Source)
    at org.apache.logging.log4j.core.layout.AbstractStringLayout.toByteArray(Unknown Source)
    at org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.append(Unknown Source)
    at org.apache.logging.log4j.core.config.AppenderControl.callAppender(Unknown Source)
    at org.apache.logging.log4j.core.config.LoggerConfig.callAppenders(Unknown Source)
    at org.apache.logging.log4j.core.config.LoggerConfig.log(Unknown Source)
    at org.apache.logging.log4j.core.config.LoggerConfig.log(Unknown Source)
    at org.apache.logging.log4j.core.Logger.logMessage(Unknown Source)
    at org.apache.logging.log4j.spi.AbstractLogger.logMessage(Unknown Source)
    at org.apache.logging.log4j.spi.AbstractLogger.logIfEnabled(Unknown Source)
    at org.apache.logging.log4j.spi.AbstractLogger.debug(Unknown Source)
    at com.liferay.patching.tool.d.n.a(Unknown Source)
    at com.liferay.patching.tool.Patcher.main(Unknown Source)

Environment

  •  Liferay DXP 7.2+

Resolution

  • This message could be ignored because it does not affect the behavior of the patching tool execution.
  • This trace could appear when using the patching tool with Java 11.
  • It does not actually refer to an error: it is an info message (see beginning of first line).

 

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