Wang, Gang created KYLIN-3140:
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Summary: Auto merge jobs should not block user build jobs
Key: KYLIN-3140
URL: https://issues.apache.org/jira/browse/KYLIN-3140
Project: Kylin
Issue Type: Improvement
Components: Job Engine
Reporter: Wang, Gang
Assignee: Shaofeng SHI
Although in the latest version, Kylin support concurrent jobs. If the
concurrency is set to 1, there is some possibility that cube build job will
have dead lock. Say, when there is some issue which causes merge job failed,
even when you discard the job, another job will be launched and failed again
due to auto merge policy. And this failed merge job blocks user to build
incremental segment.
Even if the concurrency is set to larger than 1, the auto merge jobs occupy
some concurrency quota.
While, from user perspective, they don't care much about the auto merge jobs,
and the auto merge jobs should not block the building/refresh jobs they submit
manually.
A better way may be separating the auto merge jobs from the job queue,
parameter max-building-segments only limit jobs submitted by users.
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