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Dead Datanodes

Dead Datanodes

Hi,

 

I am installing cloudera manager, however when I check the memory with command hdfs dfsadmin -report, i can see that i have 1 dead datanode. How can I bring it lo live again?

 

Thanks,

 

Regards,

11 REPLIES 11

Re: Dead Datanodes

Contributor
Could you paste here your logs? Should be under /var/log/hadoop-*

Which version have you installed ?


Regards

Re: Dead Datanodes

Thanks,

How can I check /var/log/hadoop-*?

Thanks,
Regards,

Re: Dead Datanodes

Contributor

is your Cloudera installed on Linux or Windows

Linux:

Log on to the dead datanode and go /var/log/hadoop-hdfs/ You should see your log files there. You can print it using "cat"

 

Windows: Check your hdfs config and see whare are your log installed.

 

 

Re: Dead Datanodes

Thanks, you mean as hdfs user?

Re: Dead Datanodes

Contributor

or with your root account...

 

regards

Re: Dead Datanodes

Yes, should i look for something specific? The log file has a lot of information.
Thanks,
Regards,

Re: Dead Datanodes

Contributor

you should check when your node is failing. Try to start the roles again and keep an eye on this, then, paste the error information

Re: Dead Datanodes

Soory to ask but could you please tell me how to start the roles again?
Thanks a lot,

Re: Dead Datanodes

Contributor