[CASSANDRA-9815] Tracing doesn't seem to display tombstones read accurately

• Type: Bug
• Status: Resolved
• Priority: Low
• Resolution: Not A Problem
• Component/s: Legacy/Tools
• Labels: tracing
• Severity: Low
• Since Version: 2.2.0 rc2
• Assignee: Unassigned
• Reporter: Shawn Kumar
• Tester: Shawn Kumar
• Created: 15/Jul/15 17:13
• Updated: 16/Apr/19 09:31
• Resolved: 16/Jul/15 16:19

Description

It seems that where tracing once tracked how many tombstones were read in a query, it no longer happens.

Can reproduce with the following:
1. Create a simple key, val table.
2. Insert a couple rows
3. Flush
4. Delete a row, add an additional couple rows
5. Flush
6. Try to query deleted row or select *.

In the trace it never mentions reading a tombstoned cell, no matter what. Instead you get a line like the following: "Read 0 live and 0 tombstone cells [SharedPool-Worker-3]". Attached is a screenshot of the trace.

Issue Links

• relates to: CASSANDRA-9299 Fix counting of tombstones towards TombstoneOverwhelmingException