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https://issues.apache.org/jira/browse/CASSANDRA-13121?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16473334#comment-16473334
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Patrick Bannister commented on CASSANDRA-13121:
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Thanks for reviewing this ticket!
> repair progress message breaks legacy JMX support
> -------------------------------------------------
>
> Key: CASSANDRA-13121
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13121
> Project: Cassandra
> Issue Type: Bug
> Components: Streaming and Messaging
> Reporter: Scott Bale
> Assignee: Patrick Bannister
> Priority: Minor
> Labels: jmx, lhf, notifications, repair
> Fix For: 3.0.x, 3.11.x
>
> Attachments: 13121-3.0.txt
>
>
> The error progress message in {{RepairRunnable}} is not compliant with the
> {{LegacyJMXProgressSupport}} class, which uses a regex to match on the text
> of a progress event. Therefore, actual failures slip through as successes if
> using legacy JMX for repairs.
> In {{RepairRunnable}}
> {code}
> protected void fireErrorAndComplete(String tag, int progressCount, int
> totalProgress, String message)
> {
> fireProgressEvent(tag, new ProgressEvent(ProgressEventType.ERROR,
> progressCount, totalProgress, message));
> fireProgressEvent(tag, new ProgressEvent(ProgressEventType.COMPLETE,
> progressCount, totalProgress, String.format("Repair command #%d finished with
> error", cmd)));
> }
> {code}
> Note the {{"Repair command #%d finished with error"}}
> See
> https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/repair/RepairRunnable.java#L109
> In {{LegacyJMXProgressSupport}}:
> {code}
> protected static final Pattern SESSION_FAILED_MATCHER =
> Pattern.compile("Repair session .* for range .* failed with error .*");
> protected static final Pattern SESSION_SUCCESS_MATCHER =
> Pattern.compile("Repair session .* for range .* finished");
> {code}
> See
> https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/utils/progress/jmx/LegacyJMXProgressSupport.java#L38
> Legacy JMX support was introduced for CASSANDRA-11430 (version 2.2.6) and the
> bug was introduced as part of CASSANDRA-12279 (version 2.2.8).
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