Github user zsxwing commented on a diff in the pull request: https://github.com/apache/spark/pull/3661#discussion_r21592261 --- Diff: streaming/src/main/scala/org/apache/spark/streaming/ContextWaiter.scala --- @@ -17,30 +17,74 @@ package org.apache.spark.streaming +import java.util.concurrent.{TimeoutException, TimeUnit} +import java.util.concurrent.locks.ReentrantLock +import javax.annotation.concurrent.GuardedBy + private[streaming] class ContextWaiter { + + private val lock = new ReentrantLock() + private val condition = lock.newCondition() + + @GuardedBy("lock") --- End diff -- In addition, now Findbugs does not recognize `GuardedBy` in Scala codes.
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