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https://issues.apache.org/jira/browse/CASSANDRA-14890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16687254#comment-16687254
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Jay Zhuang commented on CASSANDRA-14890:
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Here is a patch to re-enable {{warm-up}} if `n` is not set
([{{StressAction.java}}|https://github.com/apache/cassandra/commit/6a1b1f26b7174e8c9bf86a96514ab626ce2a4117#diff-fd2f2d2364937fcb1c0d73c8314f1418L90]):
| Branch | uTest | dTest |
| [14890-3.0|https://github.com/cooldoger/cassandra/tree/14890-3.0] |
[!https://circleci.com/gh/cooldoger/cassandra/tree/14890-3.0.svg?style=svg!|https://circleci.com/gh/cooldoger/cassandra/tree/14890-3.0]
|
[!https://builds.apache.org/view/A-D/view/Cassandra/job/Cassandra-devbranch-dtest/661/badge/icon!|https://builds.apache.org/view/A-D/view/Cassandra/job/Cassandra-devbranch-dtest/661/]
|
| [14890-3.11|https://github.com/cooldoger/cassandra/tree/14890-3.11] |
[!https://circleci.com/gh/cooldoger/cassandra/tree/14890-3.11.svg?style=svg!|https://circleci.com/gh/cooldoger/cassandra/tree/14890-3.11]
|
[!https://builds.apache.org/view/A-D/view/Cassandra/job/Cassandra-devbranch-dtest/662/badge/icon!|https://builds.apache.org/view/A-D/view/Cassandra/job/Cassandra-devbranch-dtest/662/]
|
| [14890-trunk|https://github.com/cooldoger/cassandra/tree/14890-trunk] |
[!https://circleci.com/gh/cooldoger/cassandra/tree/14890-trunk.svg?style=svg!|https://circleci.com/gh/cooldoger/cassandra/tree/14890-trunk]
|
[!https://builds.apache.org/view/A-D/view/Cassandra/job/Cassandra-devbranch-dtest/663/badge/icon!|https://builds.apache.org/view/A-D/view/Cassandra/job/Cassandra-devbranch-dtest/663/]
|
Here is the dTest to reproduce the problem:
|[14890|https://github.com/cooldoger/cassandra-dtest/tree/14890]|
[~Stefania] would you please review?
> cassandra-stress hang for 200 seconds if n is not specified
> -----------------------------------------------------------
>
> Key: CASSANDRA-14890
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14890
> Project: Cassandra
> Issue Type: Bug
> Components: Stress
> Reporter: Jay Zhuang
> Assignee: Jay Zhuang
> Priority: Minor
>
> if parameter {{n}} is not specified, cassandra-stress will hang (wait) for
> 200 seconds between warm-up and sending traffic.
> For example, the following command will hang 200 seconds before sending the
> traffic:
> {noformat}
> $ ./tools/bin/cassandra-stress write
> ...
> Created keyspaces. Sleeping 1s for propagation.
> Sleeping 2s...
> Warming up WRITE with 0 iterations...
> Failed to connect over JMX; not collecting these stats
> {noformat}
> It's waiting for this:
> [https://github.com/apache/cassandra/blob/06209037ea56b5a2a49615a99f1542d6ea1b2947/tools/stress/src/org/apache/cassandra/stress/util/Uncertainty.java#L72]
> As there's no warm-up traffic (CASSANDRA-13773), it will wait until:
> {noformat}
> (measurements >= waiter.maxMeasurements)
> {noformat}
> {{maxMeasurements}} is 200 by default:
> [https://github.com/apache/cassandra/blob/06209037ea56b5a2a49615a99f1542d6ea1b2947/tools/stress/src/org/apache/cassandra/stress/settings/SettingsCommand.java#L153]
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