Details
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Bug
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Status: Closed
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Major
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Resolution: Fixed
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v3.0.0-beta
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None
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None
Description
When I use spark to extract fact table distinct columns values, kylin throw an exception,
org.apache.kylin.common.KylinConfigCannotInitException: Didn't find KYLIN_CONF or KYLIN_HOME, please set one of them,
see more details in kylin_spark.log
^^ . I tried cdh5.7 and hdp2.4, both platforms got this problem.
It seems like an environment variables issue, but when I set KYLIN_CONF or KYLIN_HOME on each yarn cluster node, it still not work.
As we can see from the log, this exception occurs when TrieDictionaryBuilder try to build Dictionary<String> objects, but cannot find KylinConfig using KylinConfig.getInstanceFromEnv() method.
My solution is to add code in spark job by reset KylinConfig.THREAD_ENV_INSTANCE
from hdfs metadata as the spark job's metadata is stored in hdfs.And finally it works fine.
