Angad Singh created LENS-602:
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Summary: Easy access to per-query lens server logs
Key: LENS-602
URL: https://issues.apache.org/jira/browse/LENS-602
Project: Apache Lens
Issue Type: New Feature
Reporter: Angad Singh
Assignee: Himanshu Gahlaut
Right now one has to have access to the lens server machine and find a lens
query's job logs manually in lensserver.log file. This is neither scalable nor
user-friendly for a shared multi-tenanted lens server.
Just throwing server-exceptions to the client or showing the job ID is also
often not enough. Even when the query succeeds, one needs to see how candidate
fact tables and their columns, etc. were pruned and how join chains were
resolved, for example. That is only possible by seeing the lens server logs.
Instead of that, this ticket is to propose that lens store logs for each lens
query in a different log file on the server and that there be a REST end point
to access a query's log (by query ID). That URL can be pasted on the client
shell when the query is launched and the user can see a tailed log of all that
lens is doing behind the scenes.
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