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HBase, mail # user - How to clear hbase data in zookeeper


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Re: How to clear hbase data in zookeeper
ac@...) 2012-12-01, 04:36
Hi,

I have tried to use the 'big hammer' before, here are my steps (it is not recommended and you should have your HBase and ZK shut down first):

### shut down ZM and HBase
1) for each ZK node:
su // login as root
cd $ZOOKEEPER_HOME
cp data/myid myid // backup existing myid file to ZooKeeper's home folder
rm data/* -Rf
rm dadalog/* -Rf
mkdir -p data
mkdir -p datalog
cp myid data/myid // restore the myid backup so no need to recreate myid again

2) for each ZK node:
(start ZK )

3) finally
(start HBase)

By clearing data and datalog, you should have a very clean ZooKeeper.
Hope these help and good luck.
Thanks
ac

On 1 Dec 2012, at 10:55 AM, Kevin O'dell wrote:

> Stephen,
>
>  There are a couple ways you can do this.  The first is the small hammer
> assuming ZK is using /hbase you can log into the ZK from a ZK node using
> /usr/lib/zookeeper/bin/zkCli.sh once you are in the shell you can then
> execute a rmr /hbase and this will remove all the HBase data except the id
> of the ZK node.  Please make sure HBase is shut down.
>
>  There is a REALLY big hammer, some may call is a sledge hammer but you
> can delete the ZK data dir.  Go to each ZK node and from the shell as root
> execute a rm -rf /<path to zk data> I believe the default is
> /var/lib/zookeeper/version-2.  Again this is not recommended and you should
> have both HBase and ZK shut down for this.
>
> On Fri, Nov 30, 2012 at 8:42 PM, Stephen Boesch <[EMAIL PROTECTED]> wrote:
>
>> It is my intention to clean the zookeeper info, since getting questionable
>> behavior in hbase.
>>
>> what is the process to view/clear the data (hbase..) in zookeeper?
>>
>> To view it i tried something like:
>>
>> java -cp zookeeper.jar:lib/*:conf org.apache.zookeeper.ZooKeeperMain ls /
>> hscaler-cn001:2181
>>
>> I get an output of
>>
>> Connecting to localhost:2181
>> log4j:WARN No appenders could be found for logger
>> (org.apache.zookeeper.ZooKeeper).
>> log4j:WARN Please initialize the log4j system properly.
>>
>> WATCHER::
>>
>> WatchedEvent state:SyncConnected type:None path:null
>> [hbase, zookeeper]
>>
>>
>> I"m not sure how to get more specific info (using /hbase for example
>> results in same info..)
>>
>> Also: how to remove all of the hbase related data in zookeeper ?
>>
>> Thanks!
>>
>
>
>
> --
> Kevin O'Dell
> Customer Operations Engineer, Cloudera