Hadoop exception(Could not obtain block)

java.io.IOException: Could not obtain block: blk_3994194388687994288_1253 file=/tmp/hadoop-jack/mapred/staging/jack/.staging/job_201207131721_0004/job.split
	at org.apache.hadoop.hdfs.DFSClient$DFSInputStream.chooseDataNode(DFSClient.java:2215)
	at org.apache.hadoop.hdfs.DFSClient$DFSInputStream.blockSeekTo(DFSClient.java:2024)
	at org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:2170)
	at org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:2098)
	at java.io.DataInputStream.readByte(DataInputStream.java:248)
	at org.apache.hadoop.io.WritableUtils.readVLong(WritableUtils.java:299)
	at org.apache.hadoop.io.WritableUtils.readVInt(WritableUtils.java:320)
	at org.apache.hadoop.io.Text.readString(Text.java:400)
	at org.apache.hadoop.mapred.MapTask.getSplitDetails(MapTask.java:335)
	at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:365)
	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:325)
	at org.apache.hadoop.mapred.Child$4.run(Child.java:270)
	at java.security.A