[
https://issues.apache.org/jira/browse/DRILL-4676?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15287191#comment-15287191
]
ASF GitHub Bot commented on DRILL-4676:
---------------------------------------
Github user adeneche commented on a diff in the pull request:
https://github.com/apache/drill/pull/503#discussion_r63577142
--- Diff: common/src/main/java/org/apache/drill/common/EventProcessor.java
---
@@ -57,25 +58,35 @@ public EventProcessor() {
*/
public void sendEvent(final T newEvent) {
synchronized (queuedEvents) {
- if (isProcessing) {
- queuedEvents.addLast(newEvent);
+ queuedEvents.addLast(newEvent);
+ if (!started || isProcessing) {
--- End diff --
done
> Foreman.moveToState can block forever if called by the foreman thread while
> the query is still being setup
> ----------------------------------------------------------------------------------------------------------
>
> Key: DRILL-4676
> URL: https://issues.apache.org/jira/browse/DRILL-4676
> Project: Apache Drill
> Issue Type: Bug
> Components: Execution - Flow
> Affects Versions: 1.6.0
> Reporter: Deneche A. Hakim
> Assignee: Sudheesh Katkam
> Fix For: 1.7.0
>
>
> When the query is being setup, foreman has a special CountDownLatch that
> blocks rpc threads from delivering external events, this latch is unblocked
> at the end of the query setup.
> In some cases though, when the foreman is submitting remote fragments, a
> failure in RpcBus.send() causes an exception to be thrown that is reported to
> Foreman.FragmentSubmitListener and blocks in the CountDownLatch. This causes
> the foreman thread to block forever, and can rpc threads to be blocked too.
> This seems to happen more frequently at a high concurrency load, and also can
> prevent clients from connecting to the Drillbits.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
