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https://issues.apache.org/jira/browse/SOLR-6673?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15036845#comment-15036845
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Ishan Chattopadhyaya commented on SOLR-6673:
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Good catch, we should document it.
Maybe https://cwiki.apache.org/confluence/display/solr/Logging or
https://cwiki.apache.org/confluence/display/solr/Configuring+Logging. I can
take a look in ~2 days, unless someone else wants to take it up and/or beats me
to it.
> MDC based logging of collection, shard etc.
> -------------------------------------------
>
> Key: SOLR-6673
> URL: https://issues.apache.org/jira/browse/SOLR-6673
> Project: Solr
> Issue Type: Improvement
> Reporter: Ishan Chattopadhyaya
> Assignee: Noble Paul
> Labels: logging
> Fix For: 5.1, Trunk
>
> Attachments: SOLR-6673-log-more.patch, SOLR-6673.patch,
> SOLR-6673.patch, SOLR-6673.patch, SOLR-6673.patch, SOLR-6673.patch,
> SOLR-6673.patch, SOLR-6673.patch, SOLR-6673.patch, SOLR-6673_NPE_fix.patch,
> log4j.properties, log4j.properties
>
>
> In cloud mode, the many log items don't contain the collection name, shard
> name, core name etc. Debugging becomes specially difficult when many
> collections/shards are hosted on the same node.
> The proposed solution adds MDC based stamping of collection, shard, core to
> the thread.
> See also: SOLR-5969, SOLR-5277
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