0039557: Eclipse warnings task fails when processing log4j annotations

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Date Submitted

Last Update

0039557

Tools

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public

2018-10-29 16:42

2018-11-08 09:56

Reporter

jarmendariz

Assigned To

jarmendariz

Priority

normal

Severity

major

Reproducibility

always

Status

closed

Resolution

fixed

Platform

OS Version

Merge Request Status

Review Assigned To

alostale

OBNetwork customer

Summary

0039557: Eclipse warnings task fails when processing log4j annotations

Description

The project compiles without errors in Eclipse IDE. However, using the ecj batch compiler in the eclipse-warnings task it fails in the annotation processing step with the following message:

Processing annotations
java.lang.IllegalArgumentException: Unknown location : CLASS_OUTPUT
    at org.eclipse.jdt.internal.compiler.apt.util.EclipseFileManager.getFileForOutput(EclipseFileManager.java:436)
    at org.eclipse.jdt.internal.compiler.apt.dispatch.BatchFilerImpl.createResource(BatchFilerImpl.java:89)
    at org.apache.logging.log4j.core.config.plugins.processor.PluginProcessor.writeCacheFile(PluginProcessor.java:117)
    at org.apache.logging.log4j.core.config.plugins.processor.PluginProcessor.process(PluginProcessor.java:78)
    at org.eclipse.jdt.internal.compiler.apt.dispatch.RoundDispatcher.handleProcessor(RoundDispatcher.java:142)
    at org.eclipse.jdt.internal.compiler.apt.dispatch.RoundDispatcher.round(RoundDispatcher.java:124)
    at org.eclipse.jdt.internal.compiler.apt.dispatch.BaseAnnotationProcessorManager.processAnnotations(BaseAnnotationProcessorManager.java:162)
    at org.eclipse.jdt.internal.compiler.Compiler.processAnnotations(Compiler.java:940)
    at org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:450)
    at org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:426)
    at org.eclipse.jdt.internal.compiler.batch.Main.performCompilation(Main.java:4693)
    at org.eclipse.jdt.internal.compiler.batch.Main.compile(Main.java:1781)
    at org.eclipse.jdt.internal.compiler.batch.Main.main(Main.java:1485)
Processing annotations
No elements to process
1. ERROR: Unknown location : CLASS_OUTPUT
1 problem (1 error)

This issue has already been reported in:
- Stack Overflow: https://stackoverflow.com/questions/52998733/ecj-fails-with-illegalargumentexception-processing-log4j-annotations [^]
- Log4j Jira: https://issues.apache.org/jira/browse/LOG4J2-2487 [^]
- Eclipse issue tracker: https://bugs.eclipse.org/bugs/show_bug.cgi?id=540569 [^]

Steps To Reproduce

The following repository contains a minimal scenario to reproduce this issue:

https://github.com/katanagari7c1/ecj-error-log4j [^]

Just clone this repository and execute run-ecj.sh.

Proposed Solution

Until either Eclipse/Apache comes with a patch to solve this issue, log4j's annotation processor can be skipped in batch build by removing META-INF/services/javax.annotation.processing.Processor in log4j-core-x.y.z.jar.

This should be done only in eclipse-warnings task.

Additional Information