Getting error while creating reflections

I have distributed file system configured with azure datalake ,some reflection failed,so i have enable and disable reflection,but reflection too long time and after that return below error

Above Error when i have enabled reflection on source and click on history Tab ,then give error for All Source

Hi @Vikash_Singh

Kindly send us the server.log. It will enable us to look at the complete error message


Hello Balaji,

i am also getting stack OverFlow Error,I have migrated Dremio from 3.0 to 3.1 .when i am creating Reflection from Source thats Reflection Already show Number of job count because i have given same name Previous and deleted ,but when i am creating get above Error
2019-02-14 04:17:20,015 [239b1430-6045-41b3-5c30-386d03e70c00:foreman] ERROR - StackOverflowError
com.dremio.common.exceptions.UserException: StackOverflowError
at com.dremio.common.exceptions.UserException$ ~[dremio-common-3.1.1-201901281837360699-30c9d74.jar:3.1.1-201901281837360699-30c9d74]
at$AttemptResult.close( [dremio-sabot-kernel-3.1.1-201901281837360699-30c9d74.jar:3.1.1-201901281837360699-30c9d74]
at [dremio-sabot-kernel-3.1.1-201901281837360699-30c9d74.jar:3.1.1-201901281837360699-30c9d74]
at [dremio-sabot-kernel-3.1.1-201901281837360699-30c9d74.jar:3.1.1-201901281837360699-30c9d74]
at java.util.concurrent.ThreadPoolExecutor.runWorker( [na:1.8.0_181]
at java.util.concurrent.ThreadPoolExecutor$ [na:1.8.0_181]
at [na:1.8.0_181]
Caused by: Unexpected exception during fragment initialization: null
at [dremio-sabot-kernel-3.1.1-201901281837360699-30c9d74.jar:3.1.1-201901281837360699-30c9d74]
… 3 common frames omitted
Caused by: java.lang.StackOverflowError: null
at com.dremio.exec.planner.sql.SqlConverter.parse( ~[dremio-sabot-kernel-3.1.1-201901281837360699-30c9d74.jar:3.1.1-201901281837360699-30c9d74]
at com.dremio.exec.planner.sql.DremioSqlToRelConverter.expandView( ~[dremio-sabot-kernel-3.1.1-201901281837360699-30c9d74.jar:3.1.1-201901281837360699-30c9d74]
at (4.6 KB)

Hi @Vikash_Singh

Any chance you dropped a parent VDS and renamed a child VDS as the parent VDS name? We have a similar bug and currently working on fixing it


There was not issue in creating VDS from Orignal source ,only issue if i enable Reflection On Created Virtual Data set which had same name which i have been deleted then i get this Error,else i can able to query witout reflection too.

I am still not able to solve Stack Over flow Error,even If i Deleted Orignal Source,Delete DataSet ,and all spaces,

connected New Source,Created Same DataSet Space name as it was old but when i am creating dataset from new Source still job count ,metadata attached to that DataSet may i know the reason…

what is solution for that,

if i give Diffrent name from Previuos DataSet it will Preview Sucessfully with any errors

@balaji.ramaswamy ,i have followed your procedure it seems it works for few days but again its throwing stackOverFlow Error,this time i did not even enable Reflection ,

I see your comment as its a bug may i know which is the fixed version …