[
https://issues.apache.org/jira/browse/CASSANDRA-5483?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13935288#comment-13935288
]
Jonathan Ellis commented on CASSANDRA-5483:
-------------------------------------------
bq. Maybe exclude system_traces from repair if a repair trace is going on.
I agree that something fishy is going on, but I'd like to understand the cause
before adding a workaround. Can you shed any light [~yukim]?
bq. Maybe add a placeholder row with a null duration for ongoing repair sessions
This is what query tracing does (Tracing.begin, then stopSession writes the
duration).
bq. Verbose option; dump all traces to nodetool.
I'd be okay pushing this to another ticket, FWIW.
bq. Simplify trace messages
The main principle you want to be careful to observe is to 1) log everything
the user needs to know but 2) without logging extra noise. Redundant
information is noise. So logging the repairsession once in the "New session"
line is adequate, you don't need to repeat it with every message afterwards.
Similarly, "Requesting merkle tree" line shows what peers are involved, we
don't need to repeat that elsewhere either.
> Repair tracing
> --------------
>
> Key: CASSANDRA-5483
> URL: https://issues.apache.org/jira/browse/CASSANDRA-5483
> Project: Cassandra
> Issue Type: Improvement
> Components: Tools
> Reporter: Yuki Morishita
> Assignee: Ben Chan
> Priority: Minor
> Labels: repair
> Attachments: 5483-full-trunk.txt,
> 5483-v06-04-Allow-tracing-ttl-to-be-configured.patch,
> 5483-v06-05-Add-a-command-column-to-system_traces.events.patch,
> 5483-v06-06-Fix-interruption-in-tracestate-propagation.patch,
> 5483-v07-07-Better-constructor-parameters-for-DebuggableThreadPoolExecutor.patch,
> 5483-v07-08-Fix-brace-style.patch,
> 5483-v07-09-Add-trace-option-to-a-more-complete-set-of-repair-functions.patch,
> 5483-v07-10-Correct-name-of-boolean-repairedAt-to-fullRepair.patch,
> ccm-repair-test, cqlsh-left-justify-text-columns.patch,
> test-5483-system_traces-events.txt,
> trunk@4620823-5483-v02-0001-Trace-filtering-and-tracestate-propagation.patch,
> trunk@4620823-5483-v02-0002-Put-a-few-traces-parallel-to-the-repair-logging.patch,
> tr...@8ebeee1-5483-v01-001-trace-filtering-and-tracestate-propagation.txt,
> [email protected],
> v02p02-5483-v03-0003-Make-repair-tracing-controllable-via-nodetool.patch,
> v02p02-5483-v04-0003-This-time-use-an-EnumSet-to-pass-boolean-repair-options.patch,
> v02p02-5483-v05-0003-Use-long-instead-of-EnumSet-to-work-with-JMX.patch
>
>
> I think it would be nice to log repair stats and results like query tracing
> stores traces to system keyspace. With it, you don't have to lookup each log
> file to see what was the status and how it performed the repair you invoked.
> Instead, you can query the repair log with session ID to see the state and
> stats of all nodes involved in that repair session.
--
This message was sent by Atlassian JIRA
(v6.2#6252)
