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https://issues.apache.org/jira/browse/SOLR-6673?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14501832#comment-14501832
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Mark Miller commented on SOLR-6673:
-----------------------------------
bq. I don't really like using caps for the label distinction.
I still see this in the tests, hadn't looked to see what production is yet -
looks really ugly in my opinion.
{noformat}
22369 T48 N:127.0.0.1:49464__ c:collection1 C12
oasup.DocExpirationUpdateProcessorFactory$DeleteExpiredDocsRunnable.run
22685 T34 N:127.0.0.1:49464__ C:control_collection S:shard1 R:core_node1
c:collection1
{noformat}
Really ugly stuff we should change IMO.
> 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: Trunk, 5.1
>
> 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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