[GitHub] [incubator-druid] zhaojiandong commented on issue #6254: fix opentsdb emitter occupy 100%(#6247)

Tue, 28 Aug 2018 22:03:02 -0700 

[#6251](https://github.com/apache/incubator-druid/pull/6251/files) uses 
ScheduledExecutorService to schedule. But if emitter has large amounts data 
continuously, eventQueue always has element, there will be multiple 
EventConsumer tasks at the same time. And the object "events" is a 
List<OpentsdbEvent>, it's not safe when multiple tasks consumer it. @gianm 
![qq20180829-125938](https://user-images.githubusercontent.com/5977839/44766326-909fdd80-ab8b-11e8-9961-c4b8a4ac4edb.jpg)
![qq20180829-130023](https://user-images.githubusercontent.com/5977839/44766328-909fdd80-ab8b-11e8-8e30-a8a0c4fb54ae.jpg)
![qq20180829-130037](https://user-images.githubusercontent.com/5977839/44766330-91387400-ab8b-11e8-8ab4-7b01ca990255.jpg)



[ Full content available at: 
https://github.com/apache/incubator-druid/pull/6254 ]
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