Shixiong Zhu created SPARK-4715: ----------------------------------- Summary: ShuffleMemoryManager.tryToAcquire may return a negative value Key: SPARK-4715 URL: https://issues.apache.org/jira/browse/SPARK-4715 Project: Spark Issue Type: Bug Components: Spark Core Reporter: Shixiong Zhu
Here is a unit test to demonstrate it: {code} test("threads should not be granted a negative size") { val manager = new ShuffleMemoryManager(1000L) manager.tryToAcquire(700L) val latch = new CountDownLatch(1) startThread("t1") { manager.tryToAcquire(300L) latch.countDown() } latch.await() // Wait until `t1` calls `tryToAcquire` val granted = manager.tryToAcquire(300L) assert(0 === granted, "granted is negative") } {code} It outputs "0 did not equal -200 granted is negative" -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org