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https://issues.apache.org/jira/browse/KYLIN-3751?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shaofeng SHI resolved KYLIN-3751.
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Resolution: Workaround
> Query failed when you set log4j.logger.org.apache.calcite=DEBUG
> ---------------------------------------------------------------
>
> Key: KYLIN-3751
> URL: https://issues.apache.org/jira/browse/KYLIN-3751
> Project: Kylin
> Issue Type: Bug
> Components: Query Engine
> Affects Versions: v2.5.0
> Reporter: zengrui
> Priority: Minor
>
> Query failed when you set log4j.logger.org.apache.calcite=DEBUG in
> kylin-server-log4j.properties.It is a NullPointerException in
> VolcanoPlanner(line 891, calcite-core-1.13.0-kylin-r4), root is used before
> set.
> Then I found that it has been solved in calcite-core-1.16.0-kylin-r2. Can I
> update the calcite-core directly?
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