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Urgent..please help me...2 data nodes goes down.

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Urgent..please help me...2 data nodes goes down.

Rising Star

i have added dfs.namenode.acls.enable =true in hdfs..i have 4 data node cluster with HDP 2.1.2..i restart the services

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Re: Urgent..please help me...2 data nodes goes down.

Rising Star

Hi..tq for your time guys..i just restart the datanodes..now all nodes are up..the is resolved..but one issue(alert) left that is block health issue( correcpted blocks 108,under replicated blokcs: 500) not resolved...should i need to run hadoop fs -fsck command?

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Re: Urgent..please help me...2 data nodes goes down.

Super Guru

@sankar rao can you add here what you see in the log file?

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Re: Urgent..please help me...2 data nodes goes down.

Rising Star

@Sunile Manjee

i new this hadoop env..can please assist me where clould i found log file?

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Re: Urgent..please help me...2 data nodes goes down.

@sankar rao

Please log to server where datanodes are down

cd /var/log/hadoop/hdfs
ll -ltr

there you can find the file like this hadoop-hdfs-datanode-(hostname).log

tail -300f hadoop-hdfs-datanode-(hostname).log 

and paste the output here for analysing the issue.

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Re: Urgent..please help me...2 data nodes goes down.

Rising Star

i found hadoop-hdfs-namenode-(hostname).log but i con't datanode...i found this in cd /var/opt/teradata/log/hadoop directory in my system...

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Re: Urgent..please help me...2 data nodes goes down.

@sankar rao

check for Hadoop Log Dir Prefix property location In Ambari-->HDFS-->>Advance Hadoop env. Location pointing to that property, there you can find log files.

You need to check on datanode server.

Link

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Re: Urgent..please help me...2 data nodes goes down.

Rising Star

@SBandaru

it there like this .../var/opt/teradata/log/hadoop

while i go to cd //var/opt/teradata/log/hadoop ..i couldn't find any datanode..i can find namenode,zkfc,journalnode..etc but i con't see data node..

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Re: Urgent..please help me...2 data nodes goes down.

Super Guru

true is spelled wrong

Re: Urgent..please help me...2 data nodes goes down.

Rising Star

Hi..tq for your time guys..i just restart the datanodes..now all nodes are up..the is resolved..but one issue(alert) left that is block health issue( correcpted blocks 108,under replicated blokcs: 500) not resolved...should i need to run hadoop fs -fsck command?

View solution in original post

Highlighted

Re: Urgent..please help me...2 data nodes goes down.

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