Bernd Bartke created JAMES-3862:
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Summary: Log4J/SLF4J Binding is broken in james-server-spring-app
Key: JAMES-3862
URL: https://issues.apache.org/jira/browse/JAMES-3862
Project: James Server
Issue Type: Bug
Affects Versions: 3.8.0
Reporter: Bernd Bartke
Fix For: 3.7.3
Log4J/SLF4J Binding is broken in james-server-spring-app, starting with 3.7.2.
Server startup of 3.7.2:
{noformat}
C:\bin\james-server-spring-app-3.7.2\bin>run.bat
SLF4J: No SLF4J providers were found.
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See https://www.slf4j.org/codes.html#noProviders for further details.
SLF4J: Class path contains SLF4J bindings targeting slf4j-api versions 1.7.x or
earlier.
SLF4J: Ignoring binding found at
[jar:file:/C:/bin/james-server-spring-app-3.7.2/lib/log4j-slf4j-impl-2.17.1.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See https://www.slf4j.org/codes.html#ignoredBindings for an explanation.
15 James WARN [main] openjpa.Runtime - An error occurred while registering
a ClassTransformer with PersistenceUnitInfo: name 'James', root URL
[file:/C:/bin/james-server-spring-app-3.7.2/conf]. The error has been consumed.
To see it, set your openjpa.Runtime log level to TRACE. Load-time class
transformation will not be available.
9281 James INFO [main] openjpa.Runtime - Starting OpenJPA 3.2.0
{noformat}
Issue was introduced with commit 3460270c3a928da6ee650194a9d4f1a08e53947e by
TRAN at 2022-09-20:
slf4j.version has been changed from 1.7.36 to 2.0.1
(!) SLF4J 2 requires updated SLF4J to Log4j Adapters:
SLF4J 2 ServiceLoader mechanism to find its logging backend
https://www.slf4j.org/faq.html#changesInVersion200
https://logging.apache.org/log4j/2.x/log4j-slf4j-impl/
{quote}
{{log4j-slf4j2-impl}} should be used with SLF4J 2.0.x releases or newer.
{quote}
To fix the issue, the 3 pom.xml referencing artifactId {{log4j-slf4j-impl}}
should reference artifactId {{log4j-slf4j2-impl}} instead - {{log4j2.version}}
is alread set to {{2.19.0}}:
{noformat}
$ grep -r --include="pom.xml" "log4j-slf4j-impl" *
pom.xml: <artifactId>log4j-slf4j-impl</artifactId>
server/apps/spring-app/pom.xml:
<artifactId>log4j-slf4j-impl</artifactId>
server/container/spring/pom.xml:
<artifactId>log4j-slf4j-impl</artifactId>
{noformat}
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