Github user harishreedharan commented on a diff in the pull request:
https://github.com/apache/spark/pull/3177#discussion_r20129588
--- Diff:
external/flume-sink/src/test/scala/org/apache/spark/streaming/flume/sink/SparkSinkSuite.scala
---
@@ -159,6 +159,7 @@ class SparkSinkSuite extends FunSuite {
channelContext.put("transactionCapacity", 1000.toString)
channelContext.put("keep-alive", 0.toString)
channelContext.putAll(overrides)
+ channel.setName(getClass.getDeclaredMethods.toString)
--- End diff --
I think we can simply use a randomly generated string as the channel name,
so the InstanceAlreadyExistsException would not pop up.
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