Why my Hadoop doesn't show any live node?

I'm using Hadoop and I have to machine: Master and Slave1.When I start the hadoop and jps, they give me this output:

• Master:

  7328 NameNode    7761 ResourceManager    8056 Jps    7562 SecondaryNameNode

• Slave1:

  2037 DataNode    2299 Jps    2175 NodeManager

It is all right 'till I used "hdfs dfsadmin -report" to check my live node and it gave me this:

Configured capacity: 0 (0 B)Present Capacity:  0 (0 B)DFS Remaining:  0 (0 B)    DFS Used:  0 (0 B)    DFS Used%: 0.00%    Replicated Blocks:       Under replicated blocks: 0       Blocks with corrupt replicas: 0       Missing blocks: 0       Missing blocks (with replication factor 1): 0       Low redundancy blocks with highest priority to recover: 0       Pending deletion blocks: 0    Erasure Coded Block Groups:       Low redundancy block groups: 0       Block groups with corrupt internal blocks: 0       Missing block groups: 0       Low redundancy blocks with highest priority to recover: 0       Pending deletion blocks: 0

I also found this in hadoop-hadoopuser-datanode-slave-1.log:

2016-05-25 13:26:13,028 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: quocbao-slave1/10.0.1.32:9000. Already tried 0 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)2016-05-25 13:26:14,029 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: quocbao-slave1/10.0.1.32:9000. Already tried 1 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)2016-05-25 13:26:15,031 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: quocbao-slave1/10.0.1.32:9000. Already tried 2 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)...2016-05-25 13:26:22,040 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Problem connecting to server: quocbao-slave1/10.0.1.32:9000

I can't see my node. Can you guys help me with this please? Thank you!