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jmspaggi
Gold ⭐️
jmspaggi
Gold ⭐️
May 11, 2015
Question

Re: HBase Master: Failed to become active master

So ZK is working fine. Perfect.

 

Make sure HBase is down and clear everything:

hadoop fs -rm -r /hbase/*

echo "rmr /hbase" | zookeeper-client

 

Then try to start HBase.

 

JMS

      10 replies

      TS_01
      TS_01
      Gold ⭐️
      May 11, 2015

      Hi JM, that worked!!

      I am now able to startup HBase with all its servers!

       

      Thanks for your assistance and persistance 🙂

       

      Cheers,

      TS

       

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      jmspaggi
      Gold ⭐️
      jmspaggiAuthor
      Gold ⭐️
      May 11, 2015

      You're very welcome!

       

      Glad it now works for you. Enjoy your cluster!

       

      Best,

       

      JMS

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      simon28317
      simon28317
      Silver ⭐️
      February 2, 2017

      I'm new to Cloudera Cluster.  I read somewhere that you should not use "hadoop fs -rm -r /hbase/*" in a production enviroment.  Can you please give me detail what "hadoop fs -rm -r /hbase/*" does?  Is there any data lost or data remove to any of the services or database? 

       

      Thanks,

       

      -sr

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      sandeep3259
      sandeep3259
      Silver ⭐️⭐️
      April 7, 2017

      I have same doubt what happens when i delete "hdfs dfs  -rm -r /hbase/*" will lost data/namespaces in HBASE or HDFS?

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      jmspaggi
      Gold ⭐️
      jmspaggiAuthor
      Gold ⭐️
      April 7, 2017

      Hi Sandeep,

       

      This command will remove ALL HBase data... Snapshots, tables, WALs, etc. So be very careful with it.

       

      JMS

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      sandeep3259
      sandeep3259
      Silver ⭐️⭐️
      April 7, 2017

      so when the above command delete everything i will lost all HBASE tables/WAL's. Is the above steps recommened in Production environment?

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      jmspaggi
      Gold ⭐️
      jmspaggiAuthor
      Gold ⭐️
      April 7, 2017

      It depends what you want to achieve, right? If you goal is to repair your production cluster, then it might be relevant. If you goal is just to test and see  what it does, then what ever command it is, it should not be tested in production?

       

      Basically, the command just does what I described. It deletes everything. It's you to decide if it's relevent for your production environment or not. If you goal is just to drop a table, or all tables, then the shell is better.

       

      Are you facing any issue with your production environment?

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      sandeep3259
      sandeep3259
      Silver ⭐️⭐️
      April 7, 2017

      No...we don't have any issues so far with HBASE. I am just trying to understand the concept of it.

       

      Thanks for your assistance 🙂

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      kvinod
      kvinod
      Gold ⭐️
      April 2, 2019

      Hello,

       

      If the data was present for the same issue, then what is the best way of sollution ?

      Can you please help me.

       

      Thanks

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      jmspaggi
      Gold ⭐️
      jmspaggiAuthor
      Gold ⭐️
      April 2, 2019

      Hi Vinod,

       

      Can you please start a different thread and share your Master logs with us?

       

      JMS

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