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https://issues.apache.org/jira/browse/SOLR-16342?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17581307#comment-17581307
 ] 

Jan Høydahl commented on SOLR-16342:
------------------------------------

Thanks for the report. Do you see the same for Solr 9.0? Are you able to 
proivde a fix (Pull Request) that adds the needed libs (or symlinks)? Ideally 
this should be fixed in the Gradle build, but the libs should not be duplicated.

> <JsonLayout /> not working
> --------------------------
>
>                 Key: SOLR-16342
>                 URL: https://issues.apache.org/jira/browse/SOLR-16342
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: Docker
>    Affects Versions: 8.11.2
>            Reporter: Zaccheo Bagnati
>            Priority: Minor
>
> We customized a solr 8.1.2 docker image by adding a custom log4j2 
> configuration in order to log in json format.
> The custom configuration is simply replacing the <PatternLayout> with 
> <JsonLayout> in the main log file:
> {code:java}
> <RollingRandomAccessFile
>         name="MainLogFile"
>         fileName="${sys:solr.log.dir}/solr.log"
>         filePattern="${sys:solr.log.dir}/solr.log.%i" >
>     <JsonLayout />
>     <Policies>
>         <OnStartupTriggeringPolicy />
>         <SizeBasedTriggeringPolicy size="32 MB"/>
>     </Policies>
>     <DefaultRolloverStrategy max="10"/>
> </RollingRandomAccessFile> {code}
> We then set the LOG4J_PROPS variable point to the custom log4j configuration.
> It is not working due to this error:
> {code:java}
> ERROR Could not create plugin of type class 
> org.apache.logging.log4j.core.layout.JsonLayout for element JsonLayout: 
> java.lang.NoClassDefFoundError: 
> com/fasterxml/jackson/databind/ser/FilterProvider 
> java.lang.NoClassDefFoundError: 
> com/fasterxml/jackson/databind/ser/FilterProvider
>       at 
> org.apache.logging.log4j.core.layout.JsonLayout.<init>(JsonLayout.java:159)
>       at 
> org.apache.logging.log4j.core.layout.JsonLayout.<init>(JsonLayout.java:71)
>       at 
> org.apache.logging.log4j.core.layout.JsonLayout$Builder.build(JsonLayout.java:103)
>       at 
> org.apache.logging.log4j.core.layout.JsonLayout$Builder.build(JsonLayout.java:79)
>       at 
> org.apache.logging.log4j.core.config.plugins.util.PluginBuilder.build(PluginBuilder.java:122)
>       at 
> org.apache.logging.log4j.core.config.AbstractConfiguration.createPluginObject(AbstractConfiguration.java:1120)
>       at 
> org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:1045)
>       at 
> org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:1037)
>       at 
> org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:1037)
>       at 
> org.apache.logging.log4j.core.config.AbstractConfiguration.doConfigure(AbstractConfiguration.java:651)
>       at 
> org.apache.logging.log4j.core.config.AbstractConfiguration.initialize(AbstractConfiguration.java:247)
>       at 
> org.apache.logging.log4j.core.config.AbstractConfiguration.start(AbstractConfiguration.java:293)
>       at 
> org.apache.logging.log4j.core.LoggerContext.setConfiguration(LoggerContext.java:626)
>       at 
> org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:699)
>       at 
> org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:716)
>       at 
> org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:270)
>       at 
> org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:155)
>       at 
> org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:47)
>       at org.apache.logging.log4j.LogManager.getContext(LogManager.java:196)
>       at 
> org.apache.logging.log4j.spi.AbstractLoggerAdapter.getContext(AbstractLoggerAdapter.java:137)
>       at 
> org.apache.logging.slf4j.Log4jLoggerFactory.getContext(Log4jLoggerFactory.java:55)
>       at 
> org.apache.logging.log4j.spi.AbstractLoggerAdapter.getLogger(AbstractLoggerAdapter.java:47)
>       at 
> org.apache.logging.slf4j.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:33)
>       at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:358)
>       at org.eclipse.jetty.util.log.Slf4jLog.<init>(Slf4jLog.java:36)
>       at org.eclipse.jetty.util.log.Slf4jLog.<init>(Slf4jLog.java:30)
>       at 
> java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native
>  Method)
>       at 
> java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
>       at 
> java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>       at 
> java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
>       at org.eclipse.jetty.util.log.Log.initialized(Log.java:158)
>       at org.eclipse.jetty.util.log.Log.getLogger(Log.java:278)
>       at org.eclipse.jetty.util.log.Log.getLogger(Log.java:267)
>       at 
> org.eclipse.jetty.xml.XmlConfiguration.<clinit>(XmlConfiguration.java:88)
>       at 
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>       at 
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>       at 
> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>       at java.base/java.lang.reflect.Method.invoke(Method.java:566)
>       at org.eclipse.jetty.start.Main.invokeMain(Main.java:218)
>       at org.eclipse.jetty.start.Main.start(Main.java:491)
>       at org.eclipse.jetty.start.Main.main(Main.java:77)
> Caused by: java.lang.ClassNotFoundException: 
> com.fasterxml.jackson.databind.ser.FilterProvider
>       at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:476)
>       at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:589)
>       at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
>       ... 41 more
> {code}
> It seems that the jackson library is not in the classpath.
> As a workaround we symlinked the jackson libraries that exists in the 
> /opt/solr/server/solr-webapp/webapp/WEB-INF/lib/ directory to 
> /opt/solr/server/lib/ext/ while building the docker image:
> {code:java}
> ...
> RUN ln -s 
> /opt/solr/server/solr-webapp/webapp/WEB-INF/lib/jackson-core-2.13.3.jar 
> /opt/solr/server/lib/ext/jackson-core-2.13.3.jar && \
>     ln -s 
> /opt/solr/server/solr-webapp/webapp/WEB-INF/lib/jackson-databind-2.13.3.jar 
> /opt/solr/server/lib/ext/jackson-databind-2.13.3.jar && \
>     ln -s 
> /opt/solr/server/solr-webapp/webapp/WEB-INF/lib/jackson-annotations-2.13.3.jar
>  /opt/solr/server/lib/ext/jackson-annotations-2.13.3.jar
> ...
> {code}
> The expected behavior is that it should work "out of the box" since the json 
> log is also mentioned in the documentation in 
> https://solr.apache.org/guide/8_11/configuring-logging.html



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