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https://issues.apache.org/jira/browse/DRILL-6693?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16585854#comment-16585854
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Anton Gozhiy commented on DRILL-6693:
-------------------------------------
I pinpointed the commit where the issue was introduced:
{noformat}
commit 49faae0452935e9ee1054c056df3e038391048ba
Author: Vlad Rozov <[email protected]>
Date: Fri Mar 2 10:39:31 2018 -0800
DRILL-5994: Enable configuring number of Jetty acceptors and selectors
(default to 1 acceptor and 2 selectors)
closes #1148
{noformat}
There were added two options: drill.exec.http.jetty.server.acceptors (default
1) and drill.exec.http.jetty.server.selectors (default 2)
I tried to change them, but it didn't help.
> When a query is started from Drill Web Console, the UI becomes inaccessible
> until the query is completed
> --------------------------------------------------------------------------------------------------------
>
> Key: DRILL-6693
> URL: https://issues.apache.org/jira/browse/DRILL-6693
> Project: Apache Drill
> Issue Type: Bug
> Affects Versions: 1.13.0, 1.14.0, 1.15.0
> Reporter: Anton Gozhiy
> Priority: Major
>
> *Steps:*
> # From Web UI, run the following query:
> {noformat}
> select *
> from (
> select employee_id, full_name, first_name, last_name, position_id,
> position_title, store_id, department_id, birth_date, hire_date, salary,
> supervisor_id, education_level, marital_status, gender, management_role
> from cp.`employee.json`
> union
> select employee_id, full_name, first_name, last_name, position_id,
> position_title, store_id, department_id, birth_date, hire_date, salary,
> supervisor_id, education_level, marital_status, gender, management_role
> from cp.`employee.json`
> union
> select employee_id, full_name, first_name, last_name, position_id,
> position_title, store_id, department_id, birth_date, hire_date, salary,
> supervisor_id, education_level, marital_status, gender, management_role
> from cp.`employee.json`)
> where last_name = 'Blumberg'
> {noformat}
> # While query is running, try open the Profiles page (or any other). If It
> completes too fast, add some unions to the query above.
> *Expected result:*
> Profiles page should be opened. The running query should be listed.
> *Actual result:*
> The Web UI hangs until the query completes.
> *Notes:*
> - If you open another tab with Web Console, it also stuck when the query is
> running.
> - If the query is started from sqlline, everything is fine.
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