Block pool error in datanode

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Block pool error in datanode

Dhanushka Parakrama
Hi All

I have 5 node cluster  where  2 name node are runs in active and standby mode . when i try to add the data nodes after name node format i get the below error . is there any way to fix it





Error
====
2017-05-23 14:10:29,805 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: Initialization failed for Block pool BP-1938612011-192.168.56.148-1495541823828 (Datanode Uuid 5c652b07-e0cb-4917-9435-f534a680dbad) service to nn2.cluster.com/192.168.56.149:9000 Blockpool ID mismatch: previously connected to Blockpool ID BP-1938612011-192.168.56.148-1495541823828 but now connected to Blockpool ID BP-769166748-192.168.56.148-1494926203928
2017-05-23 14:10:34,808 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: Initialization failed for Block pool BP-1938612011-192.168.56.148-1495541823828 (Datanode Uuid 5c652b07-e0cb-4917-9435-f534a680dbad) service to nn2.cluster.com/192.168.56.149:9000 Blockpool ID mismatch: previously connected to Blockpool ID BP-1938612011-192.168.56.148-1495541823828 but now connected to Blockpool ID BP-769166748-192.168.56.148-1494926203928





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Re: Block pool error in datanode

Sidharth Kumar
So I guess this is due to change in blockpool id. If you have older fsimage backup ,start namenode using that fsimage or delete the current directory of datanodes hdfs storage and re-format the namenode once again 

Regards
Sidharth
Mob: +91 8197555599
LinkedIn: www.linkedin.com/in/sidharthkumar2792

On 23-May-2017 7:52 PM, "Dhanushka Parakrama" <[hidden email]> wrote:
Hi All

I have 5 node cluster  where  2 name node are runs in active and standby mode . when i try to add the data nodes after name node format i get the below error . is there any way to fix it





Error
====
2017-05-23 14:10:29,805 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: Initialization failed for Block pool BP-1938612011-192.168.56.148-1495541823828 (Datanode Uuid 5c652b07-e0cb-4917-9435-f534a680dbad) service to nn2.cluster.com/192.168.56.149:9000 Blockpool ID mismatch: previously connected to Blockpool ID BP-1938612011-192.168.56.148-1495541823828 but now connected to Blockpool ID BP-769166748-192.168.56.148-1494926203928
2017-05-23 14:10:34,808 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: Initialization failed for Block pool BP-1938612011-192.168.56.148-1495541823828 (Datanode Uuid 5c652b07-e0cb-4917-9435-f534a680dbad) service to nn2.cluster.com/192.168.56.149:9000 Blockpool ID mismatch: previously connected to Blockpool ID BP-1938612011-192.168.56.148-1495541823828 but now connected to Blockpool ID BP-769166748-192.168.56.148-1494926203928