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https://issues.apache.org/jira/browse/CASSANDRA-8561?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14611648#comment-14611648
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Lyuben Todorov commented on CASSANDRA-8561:
-------------------------------------------

[~nihn] You need to set the log level to WARN for SliceQueryFilter which you've 
already done, you also need to have a low enough threshold for tombstones 
configured in cassandra.yaml. The setting is `tombstone_warn_threshold` and 
default is 1000.

> Tombstone log warning does not log partition key
> ------------------------------------------------
>
>                 Key: CASSANDRA-8561
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8561
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>         Environment: Datastax DSE 4.5
>            Reporter: Jens Rantil
>            Assignee: Lyuben Todorov
>              Labels: logging
>             Fix For: 2.1.6
>
>         Attachments: cassandra-2.1-1427196372-8561-v2.diff, 
> cassandra-2.1-1427290549-8561-v3.diff, cassandra-2.1-8561.diff, 
> cassandra-2.1-head-1427124485-8561.diff, 
> cassandra-trunk-head-1427125869-8561.diff, trunk-1427195046-8561-v2.diff, 
> trunk-1427288702-8561-v3.diff
>
>
> AFAIK, the tombstone warning in system.log does not contain the primary key. 
> See: https://gist.github.com/JensRantil/44204676f4dbea79ea3a
> Including it would help a lot in diagnosing why the (CQL) row has so many 
> tombstones.
> Let me know if I have misunderstood something.



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