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Posted to issues@kylin.apache.org by "Zheng Yang (Jira)" <ji...@apache.org> on 2019/12/10 11:59:00 UTC

[jira] [Created] (KYLIN-4290) Add file lock to kylin startup script to avoid starting multiple instances on one node

Zheng Yang created KYLIN-4290:
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             Summary: Add file lock to kylin startup script to avoid starting multiple instances on one node
                 Key: KYLIN-4290
                 URL: https://issues.apache.org/jira/browse/KYLIN-4290
             Project: Kylin
          Issue Type: Improvement
          Components: Tools, Build and Test
    Affects Versions: v3.0.0, v2.6.5
            Reporter: Zheng Yang
             Fix For: v2.6.0


When we restart the Kylin instance, due to the slow start of kylin, some monitoring scripts fail to detect the surviving kylin, and will also start the kylin instance. As a result, there are multiple kylin instances on a node.
By adding a file lock to the startup script (kylin.sh), it is guaranteed that only one kylin instance will be started when concurrent startup on a node.



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