Solr 7.4 and log4j2 JSONLayout

[Michael Aleythe, Sternwald]

Hey,

I'm trying to edit the log4j2 logging configuration for solr. The goal is to 
get a log file in json format. I configured the the JSONLayout for this purpose 
inside the rollingFile appender in the log4j2.xml. After this solr stops 
logging entirely. Solr.log file is empty. Only the solr-8983-console.log file 
contains 10 lines. The line "2018-09-06 13:22:25.378:INFO:oejs.Server:main: 
Started @2814ms" is the last one.
My first guess was that the jackson-core and jackson-databind jars were 
missing, but that did not fix the problem.

Does anyone know where to find error-messages or exceptions that point me 
towards whats going wrong here?

This is my current log4j2 config file:

<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
  <Appenders>

    <Console name="STDOUT" target="SYSTEM_OUT">
      <PatternLayout>
        <Pattern>
          %d{yyyy-MM-dd HH:mm:ss.SSS} %-5p (%t) [%X{collection} %X{shard} 
%X{replica} %X{core}] %c{1.} %m%n
        </Pattern>
      </PatternLayout>
    </Console>

    <RollingFile
        name="RollingFile"
        fileName="${sys:solr.log.dir}/solr.log"
        filePattern="${sys:solr.log.dir}/solr.log.%d{yyyy-MM-dd-hh}_%i.zip" >
      <JsonLayout compact="true" eventEol="true"/>
      <Policies>
        <OnStartupTriggeringPolicy />
        <SizeBasedTriggeringPolicy size="1 MB"/>
                    <TimeBasedTriggeringPolicy interval="1"/>
      </Policies>
      <DefaultRolloverStrategy max="10"/>
    </RollingFile>

    <RollingFile
        name="SlowFile"
        fileName="${sys:solr.log.dir}/solr_slow_requests.log"
        filePattern="${sys:solr.log.dir}/solr_slow_requests.log.%i" >
      <PatternLayout>
        <Pattern>
          %d{yyyy-MM-dd HH:mm:ss.SSS} %-5p (%t) [%X{collection} %X{shard} 
%X{replica} %X{core}] %c{1.} %m%n
        </Pattern>
      </PatternLayout>
      <Policies>
        <OnStartupTriggeringPolicy />
        <SizeBasedTriggeringPolicy size="32 MB"/>
      </Policies>
      <DefaultRolloverStrategy max="10"/>
    </RollingFile>

  </Appenders>
  <Loggers>
    <Logger name="org.apache.hadoop" level="warn"/>
    <Logger name="org.apache.solr.update.LoggingInfoStream" level="off"/>
    <Logger name="org.apache.zookeeper" level="warn"/>
    <Logger name="org.apache.solr.core.SolrCore.SlowRequest" level="info" 
additivity="false">
      <AppenderRef ref="SlowFile"/>
    <Root level="debug">
      <AppenderRef ref="RollingFile"/>
      <AppenderRef ref="STDOUT"/>
    </Root>
  </Loggers>
</Configuration>

Best regards
Michael Aleythe

Michael Aleythe
Team --(sr)^(ch)--
Java Entwickler | STERNWALD SYSTEMS GMBH

Fon +49 351 31 40 6010
Fax +49 351 31 40 6001

E-Mail michael.aley...@sternwald.com
Skype michael.aley...@sternwald.com
Web www.sternwald.com

STERNWALD SYSTEMS GMBH
Pohlandstraße 19, 01309 Dresden, Germany
Geschäftsführer Ard Meier
Registergericht Handelsregister Dresden, HRB 33480
UmSt-ID DE157125091

SUPPORT / HOTLINE
Fon +49 173 38 54 752
E-Mail hotl...@sternwald.com
Web support.sternwald.net

STERNWALD Offices
Berlin | Dresden | Düsseldorf | Hamburg | Sofia | Würzburg