question Re: HBase Master: Failed to become active master in Support Questions

Re: HBase Master: Failed to become active master

jmspaggi — Mon, 11 May 2015 02:34:41 GMT

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

Re: HBase Master: Failed to become active master

TS — Mon, 11 May 2015 02:49:50 GMT

Hi JM, that worked!!

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

Thanks for your assistance and persistance 🙂

Cheers,

Re: HBase Master: Failed to become active master

jmspaggi — Mon, 11 May 2015 03:05:12 GMT

You're very welcome!

Glad it now works for you. Enjoy your cluster!

Best,

JMS

Re: HBase Master: Failed to become active master

simon28317 — Thu, 02 Feb 2017 00:30:45 GMT

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

Re: HBase Master: Failed to become active master

sandeep3259 — Fri, 07 Apr 2017 08:28:13 GMT

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

Re: HBase Master: Failed to become active master

jmspaggi — Fri, 07 Apr 2017 11:23:47 GMT

Hi Sandeep,

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

JMS

Re: HBase Master: Failed to become active master

sandeep3259 — Fri, 07 Apr 2017 11:41:21 GMT

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

Re: HBase Master: Failed to become active master

jmspaggi — Fri, 07 Apr 2017 11:48:32 GMT

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?

Re: HBase Master: Failed to become active master

sandeep3259 — Fri, 07 Apr 2017 11:50:50 GMT

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 🙂

Re: HBase Master: Failed to become active master

kvinod — Tue, 02 Apr 2019 14:27:44 GMT

Hello,

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

Can you please help me.

Thanks

Re: HBase Master: Failed to become active master

jmspaggi — Tue, 02 Apr 2019 14:48:50 GMT

Hi Vinod,

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

JMS