https://community.cloudera.com/t5/Support-Questions/datanodes-are-running-but-only-one-node-is-showing-live-out/m-p/206527#M168489 <P><A rel="user" href="https://community.cloudera.com/users/14200/asirna.html" nodeid="14200">@Aditya Sirna</A> </P><P>Please see the log below.</P><P>$ tail -f hadoop-hdfs-datanode-HKLPADBID04.log </P><P>2018-10-05 21:50:01,820 INFO datanode.DataNode (BPServiceActor.java:register(734)) - Block pool Block pool BP-1265401458-192.168.22.18-1538217251820 (Datanode Uuid 9ba5d3f6-bd76-436f-a52c-bb4bc6c3d970) service to hklpadbid02.hk.standardchartered.com/192.168.22.18:8020 successfully registered with NN </P><P>2018-10-05 21:50:01,820 INFO block.BlockTokenSecretManager (BlockTokenSecretManager.java:addKeys(193)) - Setting block keys 2018-10-05 21:50:04,718 INFO datanode.DataNode (BPOfferService.java:processCommandFromActor(609)) - DatanodeCommand action : DNA_REGISTER from hklpadbid03.hk.standardchartered.com/192.168.22.19:8020 with standby state </P><P>2018-10-05 21:50:04,718 INFO datanode.DataNode (BPServiceActor.java:register(715)) - Block pool BP-1265401458-192.168.22.18-1538217251820 (Datanode Uuid 9ba5d3f6-bd76-436f-a52c-bb4bc6c3d970) service to hklpadbid03.hk.standardchartered.com/192.168.22.19:8020 beginning handshake with NN </P><P>2018-10-05 21:50:04,719 INFO datanode.DataNode (BPServiceActor.java:register(734)) - Block pool Block pool BP-1265401458-192.168.22.18-1538217251820 (Datanode Uuid 9ba5d3f6-bd76-436f-a52c-bb4bc6c3d970) service to hklpadbid03.hk.standardchartered.com/192.168.22.19:8020 successfully registered with NN </P><P>2018-10-05 21:50:04,719 INFO block.BlockTokenSecretManager (BlockTokenSecretManager.java:addKeys(193)) - Setting block keys 2018-10-05 21:50:04,821 INFO datanode.DataNode (BPOfferService.java:processCommandFromActor(609)) - DatanodeCommand action : DNA_REGISTER from hklpadbid02.hk.standardchartered.com/192.168.22.18:8020 with active state </P><P>2018-10-05 21:50:04,821 INFO datanode.DataNode (BPServiceActor.java:register(715)) - Block pool BP-1265401458-192.168.22.18-1538217251820 (Datanode Uuid 9ba5d3f6-bd76-436f-a52c-bb4bc6c3d970) service to hklpadbid02.hk.standardchartered.com/192.168.22.18:8020 beginning handshake with NN </P><P>2018-10-05 21:50:04,822 INFO datanode.DataNode (BPServiceActor.java:register(734)) - Block pool Block pool BP-1265401458-192.168.22.18-1538217251820 (Datanode Uuid 9ba5d3f6-bd76-436f-a52c-bb4bc6c3d970) service to hklpadbid02.hk.standardchartered.com/192.168.22.18:8020 successfully registered with NN </P><P>2018-10-05 21:50:04,822 INFO block.BlockTokenSecretManager (BlockTokenSecretManager.java:addKeys(193)) - Setting block keys 2018-10-05 21:50:07,720 INFO datanode.DataNode (BPOfferService.java:processCommandFromActor(609)) - DatanodeCommand action : DNA_REGISTER from hklpadbid03.hk.standardchartered.com/192.168.22.19:8020 with standby state </P><P>2018-10-05 21:50:07,720 INFO datanode.DataNode (BPServiceActor.java:register(715)) - Block pool BP-1265401458-192.168.22.18-1538217251820 (Datanode Uuid 9ba5d3f6-bd76-436f-a52c-bb4bc6c3d970) service to hklpadbid03.hk.standardchartered.com/192.168.22.19:8020 beginning handshake with NN </P><P>2018-10-05 21:50:07,721 INFO datanode.DataNode (BPServiceActor.java:register(734)) - Block pool Block pool BP-1265401458-192.168.22.18-1538217251820 (Datanode Uuid 9ba5d3f6-bd76-436f-a52c-bb4bc6c3d970) service to hklpadbid03.hk.standardchartered.com/192.168.22.19:8020 successfully registered with NN </P><P>2018-10-05 21:50:07,721 INFO block.BlockTokenSecretManager (BlockTokenSecretManager.java:addKeys(193)) - Setting block keys 2018-10-05 21:50:07,823 INFO datanode.DataNode (BPOfferService.java:processCommandFromActor(609)) - DatanodeCommand action : DNA_REGISTER from hklpadbid02.hk.standardchartered.com/192.168.22.18:8020 with active state </P><P>2018-10-05 21:50:07,823 INFO datanode.DataNode (BPServiceActor.java:register(715)) - Block pool BP-1265401458-192.168.22.18-1538217251820 (Datanode Uuid 9ba5d3f6-bd76-436f-a52c-bb4bc6c3d970) service to hklpadbid02.hk.standardchartered.com/192.168.22.18:8020 beginning handshake with NN </P><P>2018-10-05 21:50:07,824 INFO datanode.DataNode (BPServiceActor.java:register(734)) - Block pool Block pool BP-1265401458-192.168.22.18-1538217251820 (Datanode Uuid 9ba5d3f6-bd76-436f-a52c-bb4bc6c3d970) service to hklpadbid02.hk.standardchartered.com/192.168.22.18:8020 successfully registered with NN </P><P>2018-10-05 21:50:07,824 INFO block.BlockTokenSecretManager (BlockTokenSecretManager.java:addKeys(193)) - Setting block keys</P> Fri, 05 Oct 2018 21:25:49 GMT mvssaravana 2018-10-05T21:25:49Z