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From Khurram Faraaz <kfar...@mapr.com>
Subject Re: Queries getting CANCELED
Date Wed, 18 Oct 2017 05:56:48 GMT
Can you please share your query that generates/creates the CSV ?

What is the size of the CSV file ?

What version of Drill are you on ?



From: Rahul Raj <rahul.raj@option3consulting.com>
Sent: Tuesday, October 17, 2017 7:09:35 PM
To: user@drill.apache.org
Subject: Queries getting CANCELED

I have a web app that generates CSV files using Drill.  When the CSV size
gets larger, the query state moves to CANCELED and results are always
partial/truncated. The same happens with larger parquet files too and works
fine with smaller data sets.

Code snippet is similar to:

try(Connection connection = ctx.getConnection()){
   try(Statement st = connection.createStatement()){
     st.executeQuery("alter session set `store.format` ='csv'");
     st.executeQuery("alter session set `store.format` ='parquet'");

The connections are wrapped within DBCP connection pool, I suspect DBCP
connection pool cancelling the queries. I set queryTimeout as 0, tried
adding some delays to see if its related to finishing the CSV writer, still
getting cancelled.

When the same queries are executed from Drill Web Console, complete results
are generated. Anyone faced similar issues? What could be wrong the the
scenario above?


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