ayushtkn commented on code in PR #300:
URL: https://github.com/apache/tez/pull/300#discussion_r1382298623
##########
tez-common/src/main/java/org/apache/tez/common/AsyncDispatcher.java:
##########
@@ -364,10 +369,20 @@ public void handle(Event event) {
}
try {
eventQueue.put(event);
+ if (LOG.isTraceEnabled()) {
+ LOG.trace("AsyncDispatcher put event: {}", event);
+ }
} catch (InterruptedException e) {
if (!stopped) {
- LOG.warn("AsyncDispatcher thread interrupted", e);
+ LOG.warn("AsyncDispatcher thread interrupted (while putting event):
{}", event, e);
}
+ // this is needed because in serviceStop we're looping to drain the
rest of the events and checking !drained
+ // in that case, an interruption here would lead to an empty queue
with drained=false, leading to
+ // a useless loop with a timeout (this can even cause unit test
timeouts)
+ drained = eventQueue.isEmpty();
+ LOG.info(
+ "Setting drained to {} due to interruption while putting a new
event, stopped: {}, blockNewEvents: {}",
+ drained, stopped, blockNewEvents);
Review Comment:
I tried to look out for reasons for separate boolean, but didn't find
anything reasonable, maybe the coding style then...
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