Hadoop cannot start datanode

Source: Internet
Author: User

For various reasons, we re-installed the hadoop cluster today, cleared the directory in/tmp, restarted the cluster, and started-all after hadoop namenode-format, but did not find the daemon process of datanode, I checked some information and found that it was heavy.

After the namenode is reformatted, the IDs in current/version are different. Therefore, datanode cannot be started.

Solution example:

Change namespaceid in/data/to namespaceid in the following format: restart the hadoop cluster to solve the problem.

Hadoop cannot start datanode

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