Hello everyone,
We want to log our queries to a HTTP endpoint and tried configuring our log4j
settings accordingly.
We are using Solr inside Docker with the official Solr image (version
solr:8.3.1).
As soon as we add a http appender, we receive errors on startup and solr fails
to start completely:
2020-06-17T07:06:54.976390509Z DEBUG StatusLogger
JsonLayout$Builder(propertiesAsList="null", objectMessageAsJsonObject="null",
={}, eventEol="null", compact="null", complete="null", locationInfo="null",
properties="true", includeStacktrace="null", stacktraceAsString="null",
includeNullDelimiter="null", ={}, charset="null", footerSerializer=null,
headerSerializer=null, Configuration(/var/solr/log4j2.xml), footer="null",
header="null")
2020-06-17T07:06:55.121825039Z 2020-06-17
07:06:55.104:WARN:oejw.WebAppContext:main: Failed startup of context
o.e.j.w.WebAppContext@611df6e3{/solr,file:///opt/solr-8.3.1/server/solr-webapp/webapp/,UNAVAILABLE}{/opt/solr-8.3.1/server/solr-webapp/webapp}
2020-06-17T07:06:55.121856339Z java.lang.NoClassDefFoundError: Failed to
initialize Apache Solr: Could not find necessary SLF4j logging jars. If using
Jetty, the SLF4j logging jars need to go in the jetty lib/ext directory. For
other containers, the corresponding directory should be used. For more
information, see: http://wiki.apache.org/solr/SolrLogging
It seems that only when using the http appender these jars are needed, without
this appender everything works.
Can you point me in the right direction, where I need to place the needed jars?
Seems to be a little special since I only access the /var/solr mount directly,
the rest is running in docker.
Kind Regards,
Florian Krönert
Senior Software Developer
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