# Error: com.dremio.service.namespace.NamespaceNotFoundException

**URL:** <https://community.dremio.com/t/error-com-dremio-service-namespace-namespacenotfoundexception/1165>\
**Category:** Uncategorized\
**Created:** [May 17, 2018, 8:48pm UTC](https://community.dremio.com/t/error-com-dremio-service-namespace-namespacenotfoundexception/1165 "2018-05-17T20:48:04Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![david.lee](https://avatars.discourse-cdn.com/v4/letter/d/ed655f/32.png) [@david.lee](https://community.dremio.com/u/david.lee)\
**Post date:** [May 17, 2018, 8:48pm UTC](https://community.dremio.com/t/error-com-dremio-service-namespace-namespacenotfoundexception/1165/1 "2018-05-17T20:48:04Z")

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For some reason I can no longer read a specific directory in HDFS. None of these folders have formats applied to them even though they contain jsonl.gz files…

com.dremio.service.namespace.NamespaceNotFoundException: one or more elements on the path are not found in namespace: “HDFS”.proj.hld.raw.“year=2018”

Dremio says that for /proj/hld/raw/year=2018 I have one dataset, but I’m not sure why it is there. I can’t find an equivalent virtual data set for it.

Trying to access the monthly folders by adding them to the URL works except for month=02  
com.dremio.service.namespace.NamespaceNotFoundException: one or more elements on the path are not found in namespace: “HDFS”.proj.hld.raw.“year=2018”.“month=02”

/proj/hld/raw/year=2018/month=01 is accessible  
/proj/hld/raw/year=2018/month=02 is not accessible  
/proj/hld/raw/year=2018/month=03 is accessible  
/proj/hld/raw/year=2018/month=04 is accessible

Even if I move month=02 to /tmp, the parent folder year=2018 still returns the error above.  
I even removed the entire year=2018 folder and manually created an empty year=2018 folder or year=2018/month=01 with some valid files in it and the entire 2018 folder still errors out.

I’ve tried running both:  
ALTER PDS “HDFS HALFARM”.proj.mstar.hld.raw.“year=2018”.“month=02” REFRESH METADATA  
ALTER PDS “HDFS HALFARM”.proj.mstar.hld.raw.“year=2018” REFRESH METADATA  
Unable to find requested table “HDFS HALFARM”.proj.mstar.hld.raw.“year=2018”.“month=02”  
Unable to find requested table “HDFS HALFARM”.proj.mstar.hld.raw.“year=2018”

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<div class="post-metadata">

**Author:** ![david.lee](https://avatars.discourse-cdn.com/v4/letter/d/ed655f/32.png) [@david.lee](https://community.dremio.com/u/david.lee)\
**Post date:** [May 17, 2018, 8:52pm UTC](https://community.dremio.com/t/error-com-dremio-service-namespace-namespacenotfoundexception/1165/2 "2018-05-17T20:52:44Z")

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Ok this is weird… It’s now working… Might be lag on Hadoop…