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https://issues.apache.org/jira/browse/SOLR-6673?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14372928#comment-14372928
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Noble Paul commented on SOLR-6673:
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I think doing an {{MDC.clear()}} is not a good idea. You should only clear what
you set .Most likely there will be other entries in MDC which should not be
cleared
> 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
> Attachments: SOLR-6673.patch, SOLR-6673.patch, SOLR-6673.patch,
> SOLR-6673.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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