Timeout getting response from the server

java.lang.AssertionError: Timeout getting response from the server
	at org.junit.Assert.fail(Assert.java:88)
	at org.apache.spark.network.shuffle.ExternalShuffleIntegrationSuite.fetchBlocks(ExternalShuffleIntegrationSuite.java:167)
	at org.apache.spark.network.shuffle.ExternalShuffleIntegrationSuite.fetchBlocks(ExternalShuffleIntegrationSuite.java:126)
	at org.apache.spark.network.shuffle.ExternalShuffleIntegrationSuite.testFetchWrongShuffle(ExternalShuffleIntegrationSuite.java:209)