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https://issues.apache.org/jira/browse/DRILL-5874?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16204269#comment-16204269
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ASF GitHub Bot commented on DRILL-5874:
---------------------------------------
GitHub user sohami opened a pull request:
https://github.com/apache/drill/pull/993
DRILL-5874: NPE in AnonWebUserConnection.cleanupSession()
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/sohami/drill DRILL-5874
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/drill/pull/993.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #993
----
commit f549f07bcc56f8978fa5745c52ffb4e68f67f419
Author: Sorabh Hamirwasia <[email protected]>
Date: 2017-10-11T22:57:21Z
DRILL-5874: NPE in AnonWebUserConnection.cleanupSession()
----
> NPE in AnonWebUserConnection.cleanupSession()
> ---------------------------------------------
>
> Key: DRILL-5874
> URL: https://issues.apache.org/jira/browse/DRILL-5874
> Project: Apache Drill
> Issue Type: Bug
> Affects Versions: 1.12.0
> Reporter: Paul Rogers
> Assignee: Sorabh Hamirwasia
> Fix For: 1.12.0
>
>
> When debugging another issue, I tried to use the Web UI to run the example
> query:
> {code}
> SELECT * FROM cp.`employee.json` LIMIT 20
> {code}
> The query failed with this error:
> {noformat}
> Query Failed: An Error Occurred
> java.lang.NullPointerException
> {noformat}
> No stack trace was provided in the log, even at DEBUG level.
> Debugging, the problem appears to be deep inside
> {{AnonWebUserConnection.cleanupSession()}}:
> {code}
> package io.netty.channel;
> public class DefaultChannelPromise ...
> protected EventExecutor executor() {
> EventExecutor e = super.executor();
> if (e == null) {
> return channel().eventLoop();
> } else {
> return e;
> }
> }
> {code}
> In the above, {{channel()}} is null. the {{channel}} field is also null.
> This may indicate that some part of the Web UI was not set up correctly. This
> is a recent change, as this code worked several days ago.
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