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# troubleshooting
s
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v
can you explain in more detail? What do you mean you can see sometimes and sometimes not?
b
In table I see thetasketch for sometime and it disappears after it
v
you mean the column disappears from the metadata?
b
Yes
v
can you query it when it disappears?
if you ingest some rows with sketch and then letter ingest more rows without sketch then the table in the query tab will show metadata for latest ingest
b
Now it says column not found
v
did you ingest fresh data with append to existing set to false?
b
We are injesting live stream data using Kafka
v
paste your spec here
f
Bharat - have you thought about just using Imply Polaris? It seems like you are really struggling to deploy Druid and it might simplify the entire process down to a few mins