Timeout getting response from the server

java.lang.AssertionError: Timeout getting response from the server
	at org.apache.spark.network.ChunkFetchIntegrationSuite.fetchChunks(ChunkFetchIntegrationSuite.java:174)
	at org.apache.spark.network.ChunkFetchIntegrationSuite.fetchBufferChunk(ChunkFetchIntegrationSuite.java:182)