Home | About | Sematext search-lucene.com search-hadoop.com
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB
 Search Hadoop and all its subprojects:

Switch to Threaded View
HBase >> mail # user >> HBASE -- Regionserver and QuorumPeer ?


Copy link to this message
-
Re: HBASE -- Regionserver and QuorumPeer ?
Ok - thanks for checking connectivity.

I presume you already have doublechecked the hbase-site.xml in your
region server that points to the zookeeper and hdfs-site.xml pointed
to the namenode.

I once got a similar error when HBase was picking up a stray
core-site.xml / hdfs-site.xml from the hdfs install or hbase-site.xml
from another hbase install (perhaps a stray local install)

If connectivity is all right, and you are getting connection refused,
I think your region server is picking up the wrong configuration file.
So - do a "locate" on the region server configuration files to see if
there are others on the box.

Just trying to eliminate basic setup issues ...
--Suraj
On Mon, Jul 2, 2012 at 3:55 PM, Jay Wilson
<[EMAIL PROTECTED]> wrote:
> First, thank you.
>
> I moved my HRegionservers not my HQuorumPeers.
>
> I have checked the network and everyone can talk to everyone.  I can
> even talk to my HQuorumPeers via "nc" from the nodes that should be
> running my HMaster on it and my HRegionservers.
>
> [hadoop@devrackA-00 ~]$ zookeeper-check
> devrackA-03
> imok
> This ZooKeeper instance is not currently serving requests
> This ZooKeeper instance is not currently serving requests
>
>
>
> devrackA-04
> imok
> Zookeeper version: 3.3.5-cdh3u4--1, built on 05/07/2012 20:10 GMT
> Clients:
>  /172.18.0.1:41582[0](queued=0,recved=1,sent=0)
>
> Latency min/avg/max: 0/0/0
> Received: 5
> Sent: 4
> Outstanding: 0
> Zxid: 0x0
> Mode: follower
> Node count: 4
>  /172.18.0.1:41583[0](queued=0,recved=1,sent=0)
>
>
>
>
> devrackA-05
> imok
> Zookeeper version: 3.3.5-cdh3u4--1, built on 05/07/2012 20:10 GMT
> Clients:
>  /172.18.0.1:35517[0](queued=0,recved=1,sent=0)
>
> Latency min/avg/max: 0/0/0
> Received: 5
> Sent: 4
> Outstanding: 0
> Zxid: 0x0
> Mode: follower
> Node count: 4
>  /172.18.0.1:35518[0](queued=0,recved=1,sent=0)
>
>
> ~~~~~~~~~~~~~~~~~~~~
>
>
> [hadoop@devrackA-06 ~]$ jps
> 21276 Jps
> 20641 DataNode
> [hadoop@devrackA-06 ~]$ echo ruok | nc devrackA-04 2181
> imok[hadoop@devrackA-06 ~]$ echo stat | nc devrackA-04 2181
> Zookeeper version: 3.3.5-cdh3u4--1, built on 05/07/2012 20:10 GMT
> Clients:
>  /172.18.0.7:37950[0](queued=0,recved=1,sent=0)
>
> Latency min/avg/max: 0/0/0
> Received: 8
> Sent: 7
> Outstanding: 0
> Zxid: 0x0
> Mode: follower
> Node count: 4
>
>
> ~~~~~~~~~~~~~~~~~~~
>
>
> [hadoop@devrackB-07 ~]$ echo ruok | nc devrackA-04 2181
> imok[hadoop@devrackB-07 ~]$ echo stat | nc devrackA-03 2181
> This ZooKeeper instance is not currently serving requests
> [hadoop@devrackB-07 ~]$ echo stat | nc devrackA-05 2181
> Zookeeper version: 3.3.5-cdh3u4--1, built on 05/07/2012 20:10 GMT
> Clients:
>  /172.18.0.72:40784[0](queued=0,recved=1,sent=0)
>
> Latency min/avg/max: 0/0/0
> Received: 7
> Sent: 6
> Outstanding: 0
> Zxid: 0x0
> Mode: follower
> Node count: 4
> [hadoop@devrackB-07 ~]$ echo stat | nc devrackA-04 2181
> Zookeeper version: 3.3.5-cdh3u4--1, built on 05/07/2012 20:10 GMT
> Clients:
>  /172.18.0.72:60795[0](queued=0,recved=1,sent=0)
>
> Latency min/avg/max: 0/0/0
> Received: 10
> Sent: 9
> Outstanding: 0
> Zxid: 0x0
> Mode: follower
> Node count: 4
> [hadoop@devrackB-07 ~]$
>
> ~~~~~~~~~~~
>
> I know it says connection refused in the error, but are there files
> associated with a HRegionServer that I need to clean up?  I did NOT move
> the HMaster or HQuorumPeers.  I only moved the HRegionServers
>
> Thanks you for the help.
>
> ---
> Jay Wilson
>
>
>
>
>
> On 7/2/2012 2:43 PM, Suraj Varma wrote:
>> The error you are getting is:
>>
>>> 2012-07-02 12:39:02,205 INFO org.apache.zookeeper.ClientCnxn: Opening
>>> socket connection to server devrackA-05/172.18.0.6:2181
>>> 2012-07-02 12:39:02,211 WARN org.apache.zookeeper.ClientCnxn: Session
>>> 0x0 for server null, unexpected error, closing socket connection and
>>> attempting reconnect
>>> java.net.ConnectException: Connection refused
>>
>>
>> This means this server is not able to reach the zookeeper. Did you
>> change your hbase-site.xml as well with the new zookeeper quorum?
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB