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From "Ben Chan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-5483) Repair tracing
Date Tue, 28 Oct 2014 22:34:36 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-5483?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14187618#comment-14187618
] 

Ben Chan commented on CASSANDRA-5483:
-------------------------------------

Communication seems to be off by a phase. My Oct 23 message may not have made it across. Either
that or I wasn't writing clearly enough (But in my defense, natural language has a fiddly
REPL and almost-useless error messages. And there's no source code.).

Summary:
- Forget about the removal of the addCallback + sameThreadExecutor code before.  It turns
out I didn't need to do that. The problem (I think) was some corruption in my build.
- Commenting isDone results in a convoluted comment. I was considering whether or not to do
a refactor in order to make the comment require less complication.

----

For now I've gone ahead and commented isDone as best I can and fixed the naming that resulted
in {{wait(wait);}}, along with various other fixes.

See https://github.com/usrbincc/cassandra/tree/5483-review (currently at commit 15d8ec0a9fbbf).

----

Closing comments:
- For future reference: If you don't care about handling multiple consumers (as the current
isDone does not), a large chunk of isDone (and its supporting code) could easily be replaced
with a BlockingQueue and its {{offer}} and {{poll}} methods.
- Can I get a confirmation that the unfiltered repair traces (see my Oct 22 message) in the
current patch is acceptable?


> 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
>             Fix For: 3.0
>
>         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,
5483-v08-11-Shorten-trace-messages.-Use-Tracing-begin.patch, 5483-v08-12-Trace-streaming-in-Differencer-StreamingRepairTask.patch,
5483-v08-13-sendNotification-of-local-traces-back-to-nodetool.patch, 5483-v08-14-Poll-system_traces.events.patch,
5483-v08-15-Limit-trace-notifications.-Add-exponential-backoff.patch, 5483-v09-16-Fix-hang-caused-by-incorrect-exit-code.patch,
5483-v10-17-minor-bugfixes-and-changes.patch, 5483-v10-rebased-and-squashed-471f5cc.patch,
5483-v11-01-squashed.patch, 5483-v11-squashed-nits.patch, 5483-v12-02-cassandra-yaml-ttl-doc.patch,
5483-v13-608fb03-May-14-trace-formatting-changes.patch, 5483-v14-01-squashed.patch, 5483-v15-02-Hook-up-exponential-backoff-functionality.patch,
5483-v15-03-Exact-doubling-for-exponential-backoff.patch, 5483-v15-04-Re-add-old-StorageService-JMX-signatures.patch,
5483-v15-05-Move-command-column-to-system_traces.sessions.patch, 5483-v15.patch, 5483-v17-00.patch,
5483-v17-01.patch, 5483-v17.patch, ccm-repair-test, cqlsh-left-justify-text-columns.patch,
prerepair-vs-postbuggedrepair.diff, 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, trunk@8ebeee1-5483-v01-001-trace-filtering-and-tracestate-propagation.txt,
trunk@8ebeee1-5483-v01-002-simple-repair-tracing.txt, 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.



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