Hallo,

I tried the pseudo distribution mode of HBase. The Hadoop version is
0.20.2. I configured the hbase-site.xml as

<configuration>
  <property>
    <name>hbase.rootdir</name>
    <value>hdfs://localhost:9000/hbase</value>
  </property>
  <property>
    <name>dfs.replication</name>
    <value>1</value>
  </property>
</configuration>

as same as in core-site.xml and hdfs-site.xml files of Hadoop, separately.

I can successfully start HBase. But when I tried to create a table, I
got following error information:
ERROR: org.apache.hadoop.hbase.ZooKeeperConnectionException: HBase is
able to connect to ZooKeeper but the connection closes immediately.
This could be a sign that the server has too many connections (30 is
the default). Consider inspecting your ZK server logs for that error
and then make sure you are reusing HBaseConfiguration as often as you
can. See HTable's javadoc for more information.

And I checked my ZK log and found:

2012-01-05 15:59:02,909 INFO org.apache.zookeeper.ClientCnxn: Opening
socket connection to server localhost/0:0:0:0:0:0:0:1:2181
2012-01-05 15:59:02,909 WARN org.apache.zookeeper.ClientCnxn: Session
0x134ae4d4a6d0001 for server null, unexpected error, closing socket
connection and attempting reconnect
java.net.ConnectException: Connection refused
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:567)
at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1119)

This error information appeared repeatly. Can anyone tell how to solve
this problem?

Thanks!

Yong

I had a similar problem some time ago. The problem seems to be in the ipv6
configuration. I solved it disabling ipv6 on my host editing /etc/hosts.

2012/1/5 yonghu <[EMAIL PROTECTED]>

> Hallo,
>
> I tried the pseudo distribution mode of HBase. The Hadoop version is
> 0.20.2. I configured the hbase-site.xml as
>
> <configuration>
>  <property>
>    <name>hbase.rootdir</name>
>    <value>hdfs://localhost:9000/hbase</value>
>  </property>
>  <property>
>    <name>dfs.replication</name>
>    <value>1</value>
>  </property>
> </configuration>
>
> as same as in core-site.xml and hdfs-site.xml files of Hadoop, separately.
>
> I can successfully start HBase. But when I tried to create a table, I
> got following error information:
> ERROR: org.apache.hadoop.hbase.ZooKeeperConnectionException: HBase is
> able to connect to ZooKeeper but the connection closes immediately.
> This could be a sign that the server has too many connections (30 is
> the default). Consider inspecting your ZK server logs for that error
> and then make sure you are reusing HBaseConfiguration as often as you
> can. See HTable's javadoc for more information.
>
> And I checked my ZK log and found:
>
> 2012-01-05 15:59:02,909 INFO org.apache.zookeeper.ClientCnxn: Opening
> socket connection to server localhost/0:0:0:0:0:0:0:1:2181
> 2012-01-05 15:59:02,909 WARN org.apache.zookeeper.ClientCnxn: Session
> 0x134ae4d4a6d0001 for server null, unexpected error, closing socket
> connection and attempting reconnect
> java.net.ConnectException: Connection refused
>        at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
>        at
> sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:567)
>        at
> org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1119)
>
> This error information appeared repeatly. Can anyone tell how to solve
> this problem?
>
> Thanks!
>
> Yong
>

--

*Leonardo Gamas*
Software Engineer
+557134943514
+557581347440
[EMAIL PROTECTED]
www.jusbrasil.com.br

I've seen that error before. Have you tried turning off your firewalls on each node?

I do it like this:

cat $HADOOP_INSTALL/conf/slaves | xargs -I{} ssh root@{} '/etc/init.d/iptables stop'
ssh root@jobtracker '/etc/init.d/iptables stop'
ssh root@namenode '/etc/init.d/iptables stop'

Worth a crack if you haven't tried it yet.
________________________________________
From: Leonardo Gamas [[EMAIL PROTECTED]]
Sent: 05 January 2012 15:45
To: [EMAIL PROTECTED]
Subject: Re: zookeeper connection problem in pseudo mode

I had a similar problem some time ago. The problem seems to be in the ipv6
configuration. I solved it disabling ipv6 on my host editing /etc/hosts.

2012/1/5 yonghu <[EMAIL PROTECTED]>

> Hallo,
>
> I tried the pseudo distribution mode of HBase. The Hadoop version is
> 0.20.2. I configured the hbase-site.xml as
>
> <configuration>
>  <property>
>    <name>hbase.rootdir</name>
>    <value>hdfs://localhost:9000/hbase</value>
>  </property>
>  <property>
>    <name>dfs.replication</name>
>    <value>1</value>
>  </property>
> </configuration>
>
> as same as in core-site.xml and hdfs-site.xml files of Hadoop, separately.
>
> I can successfully start HBase. But when I tried to create a table, I
> got following error information:
> ERROR: org.apache.hadoop.hbase.ZooKeeperConnectionException: HBase is
> able to connect to ZooKeeper but the connection closes immediately.
> This could be a sign that the server has too many connections (30 is
> the default). Consider inspecting your ZK server logs for that error
> and then make sure you are reusing HBaseConfiguration as often as you
> can. See HTable's javadoc for more information.
>
> And I checked my ZK log and found:
>
> 2012-01-05 15:59:02,909 INFO org.apache.zookeeper.ClientCnxn: Opening
> socket connection to server localhost/0:0:0:0:0:0:0:1:2181
> 2012-01-05 15:59:02,909 WARN org.apache.zookeeper.ClientCnxn: Session
> 0x134ae4d4a6d0001 for server null, unexpected error, closing socket
> connection and attempting reconnect
> java.net.ConnectException: Connection refused
>        at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
>        at
> sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:567)
>        at
> org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1119)
>
> This error information appeared repeatly. Can anyone tell how to solve
> this problem?
>
> Thanks!
>
> Yong
>

--

*Leonardo Gamas*
Software Engineer
+557134943514
+557581347440
[EMAIL PROTECTED]
www.jusbrasil.com.br

I set up a pseudo mode, it also needs to close the firewall?

Yong

On Thu, Jan 5, 2012 at 4:59 PM, Tom Wilcox <[EMAIL PROTECTED]> wrote:
> I've seen that error before. Have you tried turning off your firewalls on each node?
>
> I do it like this:
>
> cat $HADOOP_INSTALL/conf/slaves | xargs -I{} ssh root@{} '/etc/init.d/iptables stop'
> ssh root@jobtracker '/etc/init.d/iptables stop'
> ssh root@namenode '/etc/init.d/iptables stop'
>
> Worth a crack if you haven't tried it yet.
> ________________________________________
> From: Leonardo Gamas [[EMAIL PROTECTED]]
> Sent: 05 January 2012 15:45
> To: [EMAIL PROTECTED]
> Subject: Re: zookeeper connection problem in pseudo mode
>
> I had a similar problem some time ago. The problem seems to be in the ipv6
> configuration. I solved it disabling ipv6 on my host editing /etc/hosts.
>
> 2012/1/5 yonghu <[EMAIL PROTECTED]>
>
>> Hallo,
>>
>> I tried the pseudo distribution mode of HBase. The Hadoop version is
>> 0.20.2. I configured the hbase-site.xml as
>>
>> <configuration>
>>  <property>
>>    <name>hbase.rootdir</name>
>>    <value>hdfs://localhost:9000/hbase</value>
>>  </property>
>>  <property>
>>    <name>dfs.replication</name>
>>    <value>1</value>
>>  </property>
>> </configuration>
>>
>> as same as in core-site.xml and hdfs-site.xml files of Hadoop, separately.
>>
>> I can successfully start HBase. But when I tried to create a table, I
>> got following error information:
>> ERROR: org.apache.hadoop.hbase.ZooKeeperConnectionException: HBase is
>> able to connect to ZooKeeper but the connection closes immediately.
>> This could be a sign that the server has too many connections (30 is
>> the default). Consider inspecting your ZK server logs for that error
>> and then make sure you are reusing HBaseConfiguration as often as you
>> can. See HTable's javadoc for more information.
>>
>> And I checked my ZK log and found:
>>
>> 2012-01-05 15:59:02,909 INFO org.apache.zookeeper.ClientCnxn: Opening
>> socket connection to server localhost/0:0:0:0:0:0:0:1:2181
>> 2012-01-05 15:59:02,909 WARN org.apache.zookeeper.ClientCnxn: Session
>> 0x134ae4d4a6d0001 for server null, unexpected error, closing socket
>> connection and attempting reconnect
>> java.net.ConnectException: Connection refused
>>        at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
>>        at
>> sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:567)
>>        at
>> org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1119)
>>
>> This error information appeared repeatly. Can anyone tell how to solve
>> this problem?
>>
>> Thanks!
>>
>> Yong
>>
>
>
>
> --
>
> *Leonardo Gamas*
> Software Engineer
> +557134943514
> +557581347440
> [EMAIL PROTECTED]
> www.jusbrasil.com.br

I have already disabled ipv6 and close the firewall, but I still get
the same problem. :(

Yong

On Thu, Jan 5, 2012 at 5:16 PM, yonghu <[EMAIL PROTECTED]> wrote:
> I set up a pseudo mode, it also needs to close the firewall?
>
> Yong
>
> On Thu, Jan 5, 2012 at 4:59 PM, Tom Wilcox <[EMAIL PROTECTED]> wrote:
>> I've seen that error before. Have you tried turning off your firewalls on each node?
>>
>> I do it like this:
>>
>> cat $HADOOP_INSTALL/conf/slaves | xargs -I{} ssh root@{} '/etc/init.d/iptables stop'
>> ssh root@jobtracker '/etc/init.d/iptables stop'
>> ssh root@namenode '/etc/init.d/iptables stop'
>>
>> Worth a crack if you haven't tried it yet.
>> ________________________________________
>> From: Leonardo Gamas [[EMAIL PROTECTED]]
>> Sent: 05 January 2012 15:45
>> To: [EMAIL PROTECTED]
>> Subject: Re: zookeeper connection problem in pseudo mode
>>
>> I had a similar problem some time ago. The problem seems to be in the ipv6
>> configuration. I solved it disabling ipv6 on my host editing /etc/hosts.
>>
>> 2012/1/5 yonghu <[EMAIL PROTECTED]>
>>
>>> Hallo,
>>>
>>> I tried the pseudo distribution mode of HBase. The Hadoop version is
>>> 0.20.2. I configured the hbase-site.xml as
>>>
>>> <configuration>
>>>  <property>
>>>    <name>hbase.rootdir</name>
>>>    <value>hdfs://localhost:9000/hbase</value>
>>>  </property>
>>>  <property>
>>>    <name>dfs.replication</name>
>>>    <value>1</value>
>>>  </property>
>>> </configuration>
>>>
>>> as same as in core-site.xml and hdfs-site.xml files of Hadoop, separately.
>>>
>>> I can successfully start HBase. But when I tried to create a table, I
>>> got following error information:
>>> ERROR: org.apache.hadoop.hbase.ZooKeeperConnectionException: HBase is
>>> able to connect to ZooKeeper but the connection closes immediately.
>>> This could be a sign that the server has too many connections (30 is
>>> the default). Consider inspecting your ZK server logs for that error
>>> and then make sure you are reusing HBaseConfiguration as often as you
>>> can. See HTable's javadoc for more information.
>>>
>>> And I checked my ZK log and found:
>>>
>>> 2012-01-05 15:59:02,909 INFO org.apache.zookeeper.ClientCnxn: Opening
>>> socket connection to server localhost/0:0:0:0:0:0:0:1:2181
>>> 2012-01-05 15:59:02,909 WARN org.apache.zookeeper.ClientCnxn: Session
>>> 0x134ae4d4a6d0001 for server null, unexpected error, closing socket
>>> connection and attempting reconnect
>>> java.net.ConnectException: Connection refused
>>>        at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
>>>        at
>>> sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:567)
>>>        at
>>> org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1119)
>>>
>>> This error information appeared repeatly. Can anyone tell how to solve
>>> this problem?
>>>
>>> Thanks!
>>>
>>> Yong
>>>
>>
>>
>>
>> --
>>
>> *Leonardo Gamas*
>> Software Engineer
>> +557134943514
>> +557581347440
>> [EMAIL PROTECTED]
>> www.jusbrasil.com.br

Just to check - did you disable it the way Tom suggested? By stopping iptables?
It's not sufficient just to turn off firewall from the control panel/app.

Best,
Royston
On 5 Jan 2012, at 17:00, yonghu wrote:

> I have already disabled ipv6 and close the firewall, but I still get
> the same problem. :(
>
> Yong
>
> On Thu, Jan 5, 2012 at 5:16 PM, yonghu <[EMAIL PROTECTED]> wrote:
>> I set up a pseudo mode, it also needs to close the firewall?
>>
>> Yong
>>
>> On Thu, Jan 5, 2012 at 4:59 PM, Tom Wilcox <[EMAIL PROTECTED]> wrote:
>>> I've seen that error before. Have you tried turning off your firewalls on each node?
>>>
>>> I do it like this:
>>>
>>> cat $HADOOP_INSTALL/conf/slaves | xargs -I{} ssh root@{} '/etc/init.d/iptables stop'
>>> ssh root@jobtracker '/etc/init.d/iptables stop'
>>> ssh root@namenode '/etc/init.d/iptables stop'
>>>
>>> Worth a crack if you haven't tried it yet.
>>> ________________________________________
>>> From: Leonardo Gamas [[EMAIL PROTECTED]]
>>> Sent: 05 January 2012 15:45
>>> To: [EMAIL PROTECTED]
>>> Subject: Re: zookeeper connection problem in pseudo mode
>>>
>>> I had a similar problem some time ago. The problem seems to be in the ipv6
>>> configuration. I solved it disabling ipv6 on my host editing /etc/hosts.
>>>
>>> 2012/1/5 yonghu <[EMAIL PROTECTED]>
>>>
>>>> Hallo,
>>>>
>>>> I tried the pseudo distribution mode of HBase. The Hadoop version is
>>>> 0.20.2. I configured the hbase-site.xml as
>>>>
>>>> <configuration>
>>>>  <property>
>>>>    <name>hbase.rootdir</name>
>>>>    <value>hdfs://localhost:9000/hbase</value>
>>>>  </property>
>>>>  <property>
>>>>    <name>dfs.replication</name>
>>>>    <value>1</value>
>>>>  </property>
>>>> </configuration>
>>>>
>>>> as same as in core-site.xml and hdfs-site.xml files of Hadoop, separately.
>>>>
>>>> I can successfully start HBase. But when I tried to create a table, I
>>>> got following error information:
>>>> ERROR: org.apache.hadoop.hbase.ZooKeeperConnectionException: HBase is
>>>> able to connect to ZooKeeper but the connection closes immediately.
>>>> This could be a sign that the server has too many connections (30 is
>>>> the default). Consider inspecting your ZK server logs for that error
>>>> and then make sure you are reusing HBaseConfiguration as often as you
>>>> can. See HTable's javadoc for more information.
>>>>
>>>> And I checked my ZK log and found:
>>>>
>>>> 2012-01-05 15:59:02,909 INFO org.apache.zookeeper.ClientCnxn: Opening
>>>> socket connection to server localhost/0:0:0:0:0:0:0:1:2181
>>>> 2012-01-05 15:59:02,909 WARN org.apache.zookeeper.ClientCnxn: Session
>>>> 0x134ae4d4a6d0001 for server null, unexpected error, closing socket
>>>> connection and attempting reconnect
>>>> java.net.ConnectException: Connection refused
>>>>        at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
>>>>        at
>>>> sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:567)
>>>>        at
>>>> org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1119)
>>>>
>>>> This error information appeared repeatly. Can anyone tell how to solve
>>>> this problem?
>>>>
>>>> Thanks!
>>>>
>>>> Yong
>>>>
>>>
>>>
>>>
>>> --
>>>
>>> *Leonardo Gamas*
>>> Software Engineer
>>> +557134943514
>>> +557581347440
>>> [EMAIL PROTECTED]
>>> www.jusbrasil.com.br

this is how I stop the firewall. https://help.ubuntu.com/community/IptablesHowTo

sudo nano -w /root/fw.stop

echo "Stopping firewall and allowing everyone..."
iptables -F
iptables -X
iptables -t nat -F
iptables -t nat -X
iptables -t mangle -F
iptables -t mangle -X
iptables -P INPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -P OUTPUT ACCEPT

sudo /root/fw.stop

at last I saw the output:
huyong@huyong-laptop:~/hbase-0.90.3/bin$ sudo /root/fw.stop
stopping firewall

I am not sure weather it is what you mean to close the firewall. I
don't know if my Hadoop version 0.20.2 and Hbase 0.90.3 version are
compatible.
Yong
On Thu, Jan 5, 2012 at 6:32 PM, Royston Sellman
<[EMAIL PROTECTED]> wrote:
> Just to check - did you disable it the way Tom suggested? By stopping iptables?
> It's not sufficient just to turn off firewall from the control panel/app.
>
> Best,
> Royston
>
>
> On 5 Jan 2012, at 17:00, yonghu wrote:
>
>> I have already disabled ipv6 and close the firewall, but I still get
>> the same problem. :(
>>
>> Yong
>>
>> On Thu, Jan 5, 2012 at 5:16 PM, yonghu <[EMAIL PROTECTED]> wrote:
>>> I set up a pseudo mode, it also needs to close the firewall?
>>>
>>> Yong
>>>
>>> On Thu, Jan 5, 2012 at 4:59 PM, Tom Wilcox <[EMAIL PROTECTED]> wrote:
>>>> I've seen that error before. Have you tried turning off your firewalls on each node?
>>>>
>>>> I do it like this:
>>>>
>>>> cat $HADOOP_INSTALL/conf/slaves | xargs -I{} ssh root@{} '/etc/init.d/iptables stop'
>>>> ssh root@jobtracker '/etc/init.d/iptables stop'
>>>> ssh root@namenode '/etc/init.d/iptables stop'
>>>>
>>>> Worth a crack if you haven't tried it yet.
>>>> ________________________________________
>>>> From: Leonardo Gamas [[EMAIL PROTECTED]]
>>>> Sent: 05 January 2012 15:45
>>>> To: [EMAIL PROTECTED]
>>>> Subject: Re: zookeeper connection problem in pseudo mode
>>>>
>>>> I had a similar problem some time ago. The problem seems to be in the ipv6
>>>> configuration. I solved it disabling ipv6 on my host editing /etc/hosts.
>>>>
>>>> 2012/1/5 yonghu <[EMAIL PROTECTED]>
>>>>
>>>>> Hallo,
>>>>>
>>>>> I tried the pseudo distribution mode of HBase. The Hadoop version is
>>>>> 0.20.2. I configured the hbase-site.xml as
>>>>>
>>>>> <configuration>
>>>>>  <property>
>>>>>    <name>hbase.rootdir</name>
>>>>>    <value>hdfs://localhost:9000/hbase</value>
>>>>>  </property>
>>>>>  <property>
>>>>>    <name>dfs.replication</name>
>>>>>    <value>1</value>
>>>>>  </property>
>>>>> </configuration>
>>>>>
>>>>> as same as in core-site.xml and hdfs-site.xml files of Hadoop, separately.
>>>>>
>>>>> I can successfully start HBase. But when I tried to create a table, I
>>>>> got following error information:
>>>>> ERROR: org.apache.hadoop.hbase.ZooKeeperConnectionException: HBase is
>>>>> able to connect to ZooKeeper but the connection closes immediately.
>>>>> This could be a sign that the server has too many connections (30 is
>>>>> the default). Consider inspecting your ZK server logs for that error
>>>>> and then make sure you are reusing HBaseConfiguration as often as you
>>>>> can. See HTable's javadoc for more information.
>>>>>
>>>>> And I checked my ZK log and found:
>>>>>
>>>>> 2012-01-05 15:59:02,909 INFO org.apache.zookeeper.ClientCnxn: Opening
>>>>> socket connection to server localhost/0:0:0:0:0:0:0:1:2181
>>>>> 2012-01-05 15:59:02,909 WARN org.apache.zookeeper.ClientCnxn: Session
>>>>> 0x134ae4d4a6d0001 for server null, unexpected error, closing socket
>>>>> connection and attempting reconnect
>>>>> java.net.ConnectException: Connection refused
>>>>>        at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
>>>>>        at
>>>>> sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:567)
>>>>>        at
>>>>> org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1119)
>>>>>
>>>>> This error information appeared repeatly. Can anyone tell how to solve
>>>>> this problem?
>>>>>
>>>>> Thanks!
>>>>>
>>>>> Yong
>>>>>
>>>>
>

Hi Yong,

When I run:

sudo /etc/init.d/iptables stop

I see the following output:

iptables: Flushing firewall rules:                         [  OK  ]
iptables: Setting chains to policy ACCEPT: filter          [  OK  ]
iptables: Unloading modules:                               [  OK  ]

And my connection stopped being refused. Since I wasn't 100% sure what ports needed opening for HBase and co to work and my system was on a closed development network, I was happy just to stop the firewall services completely as above, rather than to modify the rules.

We have successfully combined (Hadoop 0.20.2 with HBase 0.90.4) and (Hadoop 1.0.0 with HBase 0.92).

HTH

Tom
________________________________________
From: yonghu [[EMAIL PROTECTED]]
Sent: 05 January 2012 21:22
To: [EMAIL PROTECTED]
Subject: Re: zookeeper connection problem in pseudo mode

this is how I stop the firewall. https://help.ubuntu.com/community/IptablesHowTo

sudo nano -w /root/fw.stop

echo "Stopping firewall and allowing everyone..."
iptables -F
iptables -X
iptables -t nat -F
iptables -t nat -X
iptables -t mangle -F
iptables -t mangle -X
iptables -P INPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -P OUTPUT ACCEPT

sudo /root/fw.stop

at last I saw the output:
huyong@huyong-laptop:~/hbase-0.90.3/bin$ sudo /root/fw.stop
stopping firewall

I am not sure weather it is what you mean to close the firewall. I
don't know if my Hadoop version 0.20.2 and Hbase 0.90.3 version are
compatible.
Yong
On Thu, Jan 5, 2012 at 6:32 PM, Royston Sellman
<[EMAIL PROTECTED]> wrote:
> Just to check - did you disable it the way Tom suggested? By stopping iptables?
> It's not sufficient just to turn off firewall from the control panel/app.
>
> Best,
> Royston
>
>
> On 5 Jan 2012, at 17:00, yonghu wrote:
>
>> I have already disabled ipv6 and close the firewall, but I still get
>> the same problem. :(
>>
>> Yong
>>
>> On Thu, Jan 5, 2012 at 5:16 PM, yonghu <[EMAIL PROTECTED]> wrote:
>>> I set up a pseudo mode, it also needs to close the firewall?
>>>
>>> Yong
>>>
>>> On Thu, Jan 5, 2012 at 4:59 PM, Tom Wilcox <[EMAIL PROTECTED]> wrote:
>>>> I've seen that error before. Have you tried turning off your firewalls on each node?
>>>>
>>>> I do it like this:
>>>>
>>>> cat $HADOOP_INSTALL/conf/slaves | xargs -I{} ssh root@{} '/etc/init.d/iptables stop'
>>>> ssh root@jobtracker '/etc/init.d/iptables stop'
>>>> ssh root@namenode '/etc/init.d/iptables stop'
>>>>
>>>> Worth a crack if you haven't tried it yet.
>>>> ________________________________________
>>>> From: Leonardo Gamas [[EMAIL PROTECTED]]
>>>> Sent: 05 January 2012 15:45
>>>> To: [EMAIL PROTECTED]
>>>> Subject: Re: zookeeper connection problem in pseudo mode
>>>>
>>>> I had a similar problem some time ago. The problem seems to be in the ipv6
>>>> configuration. I solved it disabling ipv6 on my host editing /etc/hosts.
>>>>
>>>> 2012/1/5 yonghu <[EMAIL PROTECTED]>
>>>>
>>>>> Hallo,
>>>>>
>>>>> I tried the pseudo distribution mode of HBase. The Hadoop version is
>>>>> 0.20.2. I configured the hbase-site.xml as
>>>>>
>>>>> <configuration>
>>>>>  <property>
>>>>>    <name>hbase.rootdir</name>
>>>>>    <value>hdfs://localhost:9000/hbase</value>
>>>>>  </property>
>>>>>  <property>
>>>>>    <name>dfs.replication</name>
>>>>>    <value>1</value>
>>>>>  </property>
>>>>> </configuration>
>>>>>
>>>>> as same as in core-site.xml and hdfs-site.xml files of Hadoop, separately.
>>>>>
>>>>> I can successfully start HBase. But when I tried to create a table, I
>>>>> got following error information:
>>>>> ERROR: org.apache.hadoop.hbase.ZooKeeperConnectionException: HBase is
>>>>> able to connect to ZooKeeper but the connection closes immediately.
>>>>> This could be a sign that the server has too many connections (30 is
>>>>> the default). Consider inspecting your ZK server logs for that error
>>>>> and then make sure you are reusing HBaseConfiguration as often as you
>>>>> can. See HTable's javadoc for more information.

Thanks for your response. I use Ubuntu 10.04 and the following is the
command information I got

huyong@huyong-laptop:~$ sudo /etc/init.d/iptables stop
[sudo] password for huyong:
sudo: /etc/init.d/iptables: command not found

The way you did can't work for me. The way I used is from
https://help.ubuntu.com/community/IptablesHowTo

Can you show me your hbase configuration. I mean the content of
hbase-site.xml. Or you can give me link that I can check if I did the
right configuration steps. Thanks very much.

Yong

On Fri, Jan 6, 2012 at 12:23 PM, Tom Wilcox <[EMAIL PROTECTED]> wrote:
> Hi Yong,
>
> When I run:
>
> sudo /etc/init.d/iptables stop
>
> I see the following output:
>
> iptables: Flushing firewall rules:                         [  OK  ]
> iptables: Setting chains to policy ACCEPT: filter          [  OK  ]
> iptables: Unloading modules:                               [  OK  ]
>
> And my connection stopped being refused. Since I wasn't 100% sure what ports needed opening for HBase and co to work and my system was on a closed development network, I was happy just to stop the firewall services completely as above, rather than to modify the rules.
>
> We have successfully combined (Hadoop 0.20.2 with HBase 0.90.4) and (Hadoop 1.0.0 with HBase 0.92).
>
> HTH
>
> Tom
> ________________________________________
> From: yonghu [[EMAIL PROTECTED]]
> Sent: 05 January 2012 21:22
> To: [EMAIL PROTECTED]
> Subject: Re: zookeeper connection problem in pseudo mode
>
> this is how I stop the firewall. https://help.ubuntu.com/community/IptablesHowTo
>
> sudo nano -w /root/fw.stop
>
> echo "Stopping firewall and allowing everyone..."
> iptables -F
> iptables -X
> iptables -t nat -F
> iptables -t nat -X
> iptables -t mangle -F
> iptables -t mangle -X
> iptables -P INPUT ACCEPT
> iptables -P FORWARD ACCEPT
> iptables -P OUTPUT ACCEPT
>
> sudo /root/fw.stop
>
> at last I saw the output:
> huyong@huyong-laptop:~/hbase-0.90.3/bin$ sudo /root/fw.stop
> stopping firewall
>
> I am not sure weather it is what you mean to close the firewall. I
> don't know if my Hadoop version 0.20.2 and Hbase 0.90.3 version are
> compatible.
> Yong
>
>
> On Thu, Jan 5, 2012 at 6:32 PM, Royston Sellman
> <[EMAIL PROTECTED]> wrote:
>> Just to check - did you disable it the way Tom suggested? By stopping iptables?
>> It's not sufficient just to turn off firewall from the control panel/app.
>>
>> Best,
>> Royston
>>
>>
>> On 5 Jan 2012, at 17:00, yonghu wrote:
>>
>>> I have already disabled ipv6 and close the firewall, but I still get
>>> the same problem. :(
>>>
>>> Yong
>>>
>>> On Thu, Jan 5, 2012 at 5:16 PM, yonghu <[EMAIL PROTECTED]> wrote:
>>>> I set up a pseudo mode, it also needs to close the firewall?
>>>>
>>>> Yong
>>>>
>>>> On Thu, Jan 5, 2012 at 4:59 PM, Tom Wilcox <[EMAIL PROTECTED]> wrote:
>>>>> I've seen that error before. Have you tried turning off your firewalls on each node?
>>>>>
>>>>> I do it like this:
>>>>>
>>>>> cat $HADOOP_INSTALL/conf/slaves | xargs -I{} ssh root@{} '/etc/init.d/iptables stop'
>>>>> ssh root@jobtracker '/etc/init.d/iptables stop'
>>>>> ssh root@namenode '/etc/init.d/iptables stop'
>>>>>
>>>>> Worth a crack if you haven't tried it yet.
>>>>> ________________________________________
>>>>> From: Leonardo Gamas [[EMAIL PROTECTED]]
>>>>> Sent: 05 January 2012 15:45
>>>>> To: [EMAIL PROTECTED]
>>>>> Subject: Re: zookeeper connection problem in pseudo mode
>>>>>
>>>>> I had a similar problem some time ago. The problem seems to be in the ipv6
>>>>> configuration. I solved it disabling ipv6 on my host editing /etc/hosts.
>>>>>
>>>>> 2012/1/5 yonghu <[EMAIL PROTECTED]>
>>>>>
>>>>>> Hallo,
>>>>>>
>>>>>> I tried the pseudo distribution mode of HBase. The Hadoop version is
>>>>>> 0.20.2. I configured the hbase-site.xml as
>>>>>>
>>>>>> <configuration>
>>>>>>  <property>
>>>>>>    <name>hbase.rootdir</name>
>>>>>>    <value>hdfs://localhost:9000/hbase</value>
>>>>>>  </property>
>>>>>>  <property>

Yong,

Just to have more info, if you run locally to your server:

$ telnet localhost 2181

It connects?

And if you run this command from your host to the server:

$ telnet <server_ip or hostname> 2181

What happens?

In the server:

$ netstat -na | grep LISTEN | grep 2181

What is printed?

2012/1/6 yonghu <[EMAIL PROTECTED]>

> Thanks for your response. I use Ubuntu 10.04 and the following is the
> command information I got
>
> huyong@huyong-laptop:~$ sudo /etc/init.d/iptables stop
> [sudo] password for huyong:
> sudo: /etc/init.d/iptables: command not found
>
> The way you did can't work for me. The way I used is from
> https://help.ubuntu.com/community/IptablesHowTo
>
> Can you show me your hbase configuration. I mean the content of
> hbase-site.xml. Or you can give me link that I can check if I did the
> right configuration steps. Thanks very much.
>
> Yong
>
> On Fri, Jan 6, 2012 at 12:23 PM, Tom Wilcox <[EMAIL PROTECTED]> wrote:
> > Hi Yong,
> >
> > When I run:
> >
> > sudo /etc/init.d/iptables stop
> >
> > I see the following output:
> >
> > iptables: Flushing firewall rules:                         [  OK  ]
> > iptables: Setting chains to policy ACCEPT: filter          [  OK  ]
> > iptables: Unloading modules:                               [  OK  ]
> >
> > And my connection stopped being refused. Since I wasn't 100% sure what
> ports needed opening for HBase and co to work and my system was on a closed
> development network, I was happy just to stop the firewall services
> completely as above, rather than to modify the rules.
> >
> > We have successfully combined (Hadoop 0.20.2 with HBase 0.90.4) and
> (Hadoop 1.0.0 with HBase 0.92).
> >
> > HTH
> >
> > Tom
> > ________________________________________
> > From: yonghu [[EMAIL PROTECTED]]
> > Sent: 05 January 2012 21:22
> > To: [EMAIL PROTECTED]
> > Subject: Re: zookeeper connection problem in pseudo mode
> >
> > this is how I stop the firewall.
> https://help.ubuntu.com/community/IptablesHowTo
> >
> > sudo nano -w /root/fw.stop
> >
> > echo "Stopping firewall and allowing everyone..."
> > iptables -F
> > iptables -X
> > iptables -t nat -F
> > iptables -t nat -X
> > iptables -t mangle -F
> > iptables -t mangle -X
> > iptables -P INPUT ACCEPT
> > iptables -P FORWARD ACCEPT
> > iptables -P OUTPUT ACCEPT
> >
> > sudo /root/fw.stop
> >
> > at last I saw the output:
> > huyong@huyong-laptop:~/hbase-0.90.3/bin$ sudo /root/fw.stop
> > stopping firewall
> >
> > I am not sure weather it is what you mean to close the firewall. I
> > don't know if my Hadoop version 0.20.2 and Hbase 0.90.3 version are
> > compatible.
> > Yong
> >
> >
> > On Thu, Jan 5, 2012 at 6:32 PM, Royston Sellman
> > <[EMAIL PROTECTED]> wrote:
> >> Just to check - did you disable it the way Tom suggested? By stopping
> iptables?
> >> It's not sufficient just to turn off firewall from the control
> panel/app.
> >>
> >> Best,
> >> Royston
> >>
> >>
> >> On 5 Jan 2012, at 17:00, yonghu wrote:
> >>
> >>> I have already disabled ipv6 and close the firewall, but I still get
> >>> the same problem. :(
> >>>
> >>> Yong
> >>>
> >>> On Thu, Jan 5, 2012 at 5:16 PM, yonghu <[EMAIL PROTECTED]> wrote:
> >>>> I set up a pseudo mode, it also needs to close the firewall?
> >>>>
> >>>> Yong
> >>>>
> >>>> On Thu, Jan 5, 2012 at 4:59 PM, Tom Wilcox <[EMAIL PROTECTED]>
> wrote:
> >>>>> I've seen that error before. Have you tried turning off your
> firewalls on each node?
> >>>>>
> >>>>> I do it like this:
> >>>>>
> >>>>> cat $HADOOP_INSTALL/conf/slaves | xargs -I{} ssh root@{}
> '/etc/init.d/iptables stop'
> >>>>> ssh root@jobtracker '/etc/init.d/iptables stop'
> >>>>> ssh root@namenode '/etc/init.d/iptables stop'
> >>>>>
> >>>>> Worth a crack if you haven't tried it yet.
> >>>>> ________________________________________
> >>>>> From: Leonardo Gamas [[EMAIL PROTECTED]]
> >>>>> Sent: 05 January 2012 15:45
> >>>>> To: [EMAIL PROTECTED]
> >>>>> Subject: Re: zookeeper connection problem in pseudo mode
*Leonardo Gamas*
Software Engineer
T +55 (71) 3494-3514
C +55 (75) 8134-7440
[EMAIL PROTECTED]
www.jusbrasil.com.br

Hallo,

I input the first command
$ telnet localhost 2181
the output is

Trying 127.0.0.1...
Trying ::1...
telnet: Unable to connect to remote host: Network is unreachable

As I run the pseudo mode, server and client are the same. So I input

 netstat -na | grep LISTEN | grep 2181

But I got no output information.

Yong
On Fri, Jan 6, 2012 at 2:25 PM, Leonardo Gamas
<[EMAIL PROTECTED]> wrote:
> Yong,
>
> Just to have more info, if you run locally to your server:
>
> $ telnet localhost 2181
>
> It connects?
>
> And if you run this command from your host to the server:
>
> $ telnet <server_ip or hostname> 2181
>
> What happens?
>
> In the server:
>
> $ netstat -na | grep LISTEN | grep 2181
>
> What is printed?
>
> 2012/1/6 yonghu <[EMAIL PROTECTED]>
>
>> Thanks for your response. I use Ubuntu 10.04 and the following is the
>> command information I got
>>
>> huyong@huyong-laptop:~$ sudo /etc/init.d/iptables stop
>> [sudo] password for huyong:
>> sudo: /etc/init.d/iptables: command not found
>>
>> The way you did can't work for me. The way I used is from
>> https://help.ubuntu.com/community/IptablesHowTo
>>
>> Can you show me your hbase configuration. I mean the content of
>> hbase-site.xml. Or you can give me link that I can check if I did the
>> right configuration steps. Thanks very much.
>>
>> Yong
>>
>> On Fri, Jan 6, 2012 at 12:23 PM, Tom Wilcox <[EMAIL PROTECTED]> wrote:
>> > Hi Yong,
>> >
>> > When I run:
>> >
>> > sudo /etc/init.d/iptables stop
>> >
>> > I see the following output:
>> >
>> > iptables: Flushing firewall rules:                         [  OK  ]
>> > iptables: Setting chains to policy ACCEPT: filter          [  OK  ]
>> > iptables: Unloading modules:                               [  OK  ]
>> >
>> > And my connection stopped being refused. Since I wasn't 100% sure what
>> ports needed opening for HBase and co to work and my system was on a closed
>> development network, I was happy just to stop the firewall services
>> completely as above, rather than to modify the rules.
>> >
>> > We have successfully combined (Hadoop 0.20.2 with HBase 0.90.4) and
>> (Hadoop 1.0.0 with HBase 0.92).
>> >
>> > HTH
>> >
>> > Tom
>> > ________________________________________
>> > From: yonghu [[EMAIL PROTECTED]]
>> > Sent: 05 January 2012 21:22
>> > To: [EMAIL PROTECTED]
>> > Subject: Re: zookeeper connection problem in pseudo mode
>> >
>> > this is how I stop the firewall.
>> https://help.ubuntu.com/community/IptablesHowTo
>> >
>> > sudo nano -w /root/fw.stop
>> >
>> > echo "Stopping firewall and allowing everyone..."
>> > iptables -F
>> > iptables -X
>> > iptables -t nat -F
>> > iptables -t nat -X
>> > iptables -t mangle -F
>> > iptables -t mangle -X
>> > iptables -P INPUT ACCEPT
>> > iptables -P FORWARD ACCEPT
>> > iptables -P OUTPUT ACCEPT
>> >
>> > sudo /root/fw.stop
>> >
>> > at last I saw the output:
>> > huyong@huyong-laptop:~/hbase-0.90.3/bin$ sudo /root/fw.stop
>> > stopping firewall
>> >
>> > I am not sure weather it is what you mean to close the firewall. I
>> > don't know if my Hadoop version 0.20.2 and Hbase 0.90.3 version are
>> > compatible.
>> > Yong
>> >
>> >
>> > On Thu, Jan 5, 2012 at 6:32 PM, Royston Sellman
>> > <[EMAIL PROTECTED]> wrote:
>> >> Just to check - did you disable it the way Tom suggested? By stopping
>> iptables?
>> >> It's not sufficient just to turn off firewall from the control
>> panel/app.
>> >>
>> >> Best,
>> >> Royston
>> >>
>> >>
>> >> On 5 Jan 2012, at 17:00, yonghu wrote:
>> >>
>> >>> I have already disabled ipv6 and close the firewall, but I still get
>> >>> the same problem. :(
>> >>>
>> >>> Yong
>> >>>
>> >>> On Thu, Jan 5, 2012 at 5:16 PM, yonghu <[EMAIL PROTECTED]> wrote:
>> >>>> I set up a pseudo mode, it also needs to close the firewall?
>> >>>>
>> >>>> Yong
>> >>>>
>> >>>> On Thu, Jan 5, 2012 at 4:59 PM, Tom Wilcox <[EMAIL PROTECTED]>
>> wrote:
>> >>>>> I've seen that error before. Have you tried turning off your
>> firewalls on each node?

Seems you does not have a loopback device configured. How many network
interfaces appear when you run the command:

$ ifconfig
2012/1/6 yonghu <[EMAIL PROTECTED]>

> Hallo,
>
> I input the first command
> $ telnet localhost 2181
> the output is
>
> Trying 127.0.0.1...
> Trying ::1...
> telnet: Unable to connect to remote host: Network is unreachable
>
> As I run the pseudo mode, server and client are the same. So I input
>
>  netstat -na | grep LISTEN | grep 2181
>
> But I got no output information.
>
> Yong
> On Fri, Jan 6, 2012 at 2:25 PM, Leonardo Gamas
> <[EMAIL PROTECTED]> wrote:
> > Yong,
> >
> > Just to have more info, if you run locally to your server:
> >
> > $ telnet localhost 2181
> >
> > It connects?
> >
> > And if you run this command from your host to the server:
> >
> > $ telnet <server_ip or hostname> 2181
> >
> > What happens?
> >
> > In the server:
> >
> > $ netstat -na | grep LISTEN | grep 2181
> >
> > What is printed?
> >
> > 2012/1/6 yonghu <[EMAIL PROTECTED]>
> >
> >> Thanks for your response. I use Ubuntu 10.04 and the following is the
> >> command information I got
> >>
> >> huyong@huyong-laptop:~$ sudo /etc/init.d/iptables stop
> >> [sudo] password for huyong:
> >> sudo: /etc/init.d/iptables: command not found
> >>
> >> The way you did can't work for me. The way I used is from
> >> https://help.ubuntu.com/community/IptablesHowTo
> >>
> >> Can you show me your hbase configuration. I mean the content of
> >> hbase-site.xml. Or you can give me link that I can check if I did the
> >> right configuration steps. Thanks very much.
> >>
> >> Yong
> >>
> >> On Fri, Jan 6, 2012 at 12:23 PM, Tom Wilcox <[EMAIL PROTECTED]>
> wrote:
> >> > Hi Yong,
> >> >
> >> > When I run:
> >> >
> >> > sudo /etc/init.d/iptables stop
> >> >
> >> > I see the following output:
> >> >
> >> > iptables: Flushing firewall rules:                         [  OK  ]
> >> > iptables: Setting chains to policy ACCEPT: filter          [  OK  ]
> >> > iptables: Unloading modules:                               [  OK  ]
> >> >
> >> > And my connection stopped being refused. Since I wasn't 100% sure what
> >> ports needed opening for HBase and co to work and my system was on a
> closed
> >> development network, I was happy just to stop the firewall services
> >> completely as above, rather than to modify the rules.
> >> >
> >> > We have successfully combined (Hadoop 0.20.2 with HBase 0.90.4) and
> >> (Hadoop 1.0.0 with HBase 0.92).
> >> >
> >> > HTH
> >> >
> >> > Tom
> >> > ________________________________________
> >> > From: yonghu [[EMAIL PROTECTED]]
> >> > Sent: 05 January 2012 21:22
> >> > To: [EMAIL PROTECTED]
> >> > Subject: Re: zookeeper connection problem in pseudo mode
> >> >
> >> > this is how I stop the firewall.
> >> https://help.ubuntu.com/community/IptablesHowTo
> >> >
> >> > sudo nano -w /root/fw.stop
> >> >
> >> > echo "Stopping firewall and allowing everyone..."
> >> > iptables -F
> >> > iptables -X
> >> > iptables -t nat -F
> >> > iptables -t nat -X
> >> > iptables -t mangle -F
> >> > iptables -t mangle -X
> >> > iptables -P INPUT ACCEPT
> >> > iptables -P FORWARD ACCEPT
> >> > iptables -P OUTPUT ACCEPT
> >> >
> >> > sudo /root/fw.stop
> >> >
> >> > at last I saw the output:
> >> > huyong@huyong-laptop:~/hbase-0.90.3/bin$ sudo /root/fw.stop
> >> > stopping firewall
> >> >
> >> > I am not sure weather it is what you mean to close the firewall. I
> >> > don't know if my Hadoop version 0.20.2 and Hbase 0.90.3 version are
> >> > compatible.
> >> > Yong
> >> >
> >> >
> >> > On Thu, Jan 5, 2012 at 6:32 PM, Royston Sellman
> >> > <[EMAIL PROTECTED]> wrote:
> >> >> Just to check - did you disable it the way Tom suggested? By stopping
> >> iptables?
> >> >> It's not sufficient just to turn off firewall from the control
> >> panel/app.
> >> >>
> >> >> Best,
> >> >> Royston
> >> >>
> >> >>
> >> >> On 5 Jan 2012, at 17:00, yonghu wrote:
> >> >>
> >> >>> I have already disabled ipv6 and close the firewall, but I still get
*Leonardo Gamas*
Software Engineer
T +55 (71) 3494-3514
C +55 (75) 8134-7440
[EMAIL PROTECTED]
www.jusbrasil.com.br

Yong,

Following Leonardo's response, when I run ifconfig on our regionserver (also our namenode) I get the following:
[hadoop1@namenode hadoop-1.0.0]$ ifconfig
eth0      Link encap:Ethernet  HWaddr 00:15:5D:00:E5:09
          inet addr:10.0.0.235  Bcast:10.255.255.255  Mask:255.0.0.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:19919141 errors:0 dropped:0 overruns:0 frame:4
          TX packets:12620289 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:15386337069 (14.3 GiB)  TX bytes:5571908867 (5.1 GiB)
          Interrupt:9 Base address:0x6000

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:3121776 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3121776 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1272206567 (1.1 GiB)  TX bytes:1272206567 (1.1 GiB)

Here's the contents of our hbase-site.xml, however, please note that we are running our zookeepers outside of hbase (i.e. in $HBASE_HOME/conf/hbase-env.sh we have set the following:  "export HBASE_MANAGES_ZK=false" ) and we are running in fully distributed mode, so I am not sure how useful this will be to you:

[hadoop1@namenode hadoop-1.0.0]$ cat /opt/hbase/hbase-0.92/conf/hbase-site.xml
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<!--
/**
 * Copyright 2010 The Apache Software Foundation
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
-->
<configuration>
<!-- Fully Distributed -->
  <property>
    <name>hbase.rootdir</name>
    <value>hdfs://namenode:8020/hbase</value>
    <description>The directory shared by RegionServers.</description>
  </property>
  <property>
    <name>hbase.cluster.distributed</name>
    <value>true</value>
    <description>
                The mode the cluster will be in. Possible values are
                false: standalone and pseudo-distributed setups with managed Zookeeper
                true: fully-distributed with unmanaged Zookeeper Quorum (see hbase-env.sh)
    </description>
  </property>

<!-- ZooKeeper config -->
    <property>
      <name>hbase.zookeeper.property.clientPort</name>
      <value>2181</value>
      <description>
                Property from ZooKeeper's config zoo.cfg.
                The port at which the clients will connect.
      </description>
    </property>
    <property>
      <name>hbase.zookeeper.quorum</name>
      <value>namenode, jobtracker, slave0</value>
      <description>
        Comma separated list of servers in the ZooKeeper Quorum.
        For example, "host1.mydomain.com,host2.mydomain.com,host3.mydomain.com".
        By default this is set to localhost for local and pseudo-distributed modes
        of operation. For a fully-distributed setup, this should be set to a full
        list of ZooKeeper quorum servers. If HBASE_MANAGES_ZK is set in hbase-env.sh
        this is the list of servers which we will start/stop ZooKeeper on.
      </description>
    </property>
    <property>
      <name>hbase.zookeeper.property.dataDir</name>
      <value>/zookeeper_data</value>
      <description>
                Property from ZooKeeper's config zoo.cfg.
                The directory where the snapshot is stored.
      </description>
    </property>

<!-- Pseudo-distributed -->
<!--
        <property>
                <name>hbase.rootdir</name>
                <value>hdfs://namenode:8020/hbase</value>
                <description>
                        The directory shared by RegionServers.
                </description>
        </property>
        <property>
                <name>dfs.replication</name>
                <value>1</value>
                <description>
                        The replication count for HLog and HFile storage. Should not be greater than                                                                                                            HDFS datanode count.
                </description>
        </property>
<!-- Standalone -->
<!--
        <property>
            <name>hbase.rootdir</name>
            <value>file:///hbase_data</value>
        </property>
</configuration>

It does sound like it could be a ZooKeeper issue. Have you tried installing zookeeper separately as we have done? Note that the pseudo-distributed settings we used are still commented out at the bottom.

HTH

Tom

________________________________________
From: Leonardo Gamas [[EMAIL PROTECTED]]
Sent: 06 January 2012 15:05
To: [EMAIL PROTECTED]
Subject: Re: zookeeper connection problem in pseudo mode

Seems you does not have a loopback device configured. How many network
interfaces appear when you run the command:

$ ifconfig
2012/1/6 yonghu <[EMAIL PROTECTED]>

*Leonardo Gamas*
Software Engineer
T +55 (71) 3494-3514
C +55 (75) 8134-7440
[EMAIL PROTECTED]
www.jusbrasil.com.br

Hello Tom,

Thanks for your suggestion. I also felt that Zookeeper had problem. I
will try to install Zookeeper separate from HBase.

Yong

On Fri, Jan 6, 2012 at 5:01 PM, Tom Wilcox <[EMAIL PROTECTED]> wrote:
> Yong,
>
> Following Leonardo's response, when I run ifconfig on our regionserver (also our namenode) I get the following:
>
>
> [hadoop1@namenode hadoop-1.0.0]$ ifconfig
> eth0      Link encap:Ethernet  HWaddr 00:15:5D:00:E5:09
>          inet addr:10.0.0.235  Bcast:10.255.255.255  Mask:255.0.0.0
>          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>          RX packets:19919141 errors:0 dropped:0 overruns:0 frame:4
>          TX packets:12620289 errors:0 dropped:0 overruns:0 carrier:0
>          collisions:0 txqueuelen:1000
>          RX bytes:15386337069 (14.3 GiB)  TX bytes:5571908867 (5.1 GiB)
>          Interrupt:9 Base address:0x6000
>
> lo        Link encap:Local Loopback
>          inet addr:127.0.0.1  Mask:255.0.0.0
>          UP LOOPBACK RUNNING  MTU:16436  Metric:1
>          RX packets:3121776 errors:0 dropped:0 overruns:0 frame:0
>          TX packets:3121776 errors:0 dropped:0 overruns:0 carrier:0
>          collisions:0 txqueuelen:0
>          RX bytes:1272206567 (1.1 GiB)  TX bytes:1272206567 (1.1 GiB)
>
> Here's the contents of our hbase-site.xml, however, please note that we are running our zookeepers outside of hbase (i.e. in $HBASE_HOME/conf/hbase-env.sh we have set the following:  "export HBASE_MANAGES_ZK=false" ) and we are running in fully distributed mode, so I am not sure how useful this will be to you:
>
> [hadoop1@namenode hadoop-1.0.0]$ cat /opt/hbase/hbase-0.92/conf/hbase-site.xml
> <?xml version="1.0"?>
> <?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
> <!--
> /**
>  * Copyright 2010 The Apache Software Foundation
>  *
>  * Licensed to the Apache Software Foundation (ASF) under one
>  * or more contributor license agreements.  See the NOTICE file
>  * distributed with this work for additional information
>  * regarding copyright ownership.  The ASF licenses this file
>  * to you under the Apache License, Version 2.0 (the
>  * "License"); you may not use this file except in compliance
>  * with the License.  You may obtain a copy of the License at
>  *
>  *     http://www.apache.org/licenses/LICENSE-2.0
>  *
>  * Unless required by applicable law or agreed to in writing, software
>  * distributed under the License is distributed on an "AS IS" BASIS,
>  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
>  * See the License for the specific language governing permissions and
>  * limitations under the License.
>  */
> -->
> <configuration>
> <!-- Fully Distributed -->
>  <property>
>    <name>hbase.rootdir</name>
>    <value>hdfs://namenode:8020/hbase</value>
>    <description>The directory shared by RegionServers.</description>
>  </property>
>  <property>
>    <name>hbase.cluster.distributed</name>
>    <value>true</value>
>    <description>
>                The mode the cluster will be in. Possible values are
>                false: standalone and pseudo-distributed setups with managed Zookeeper
>                true: fully-distributed with unmanaged Zookeeper Quorum (see hbase-env.sh)
>    </description>
>  </property>
>
> <!-- ZooKeeper config -->
>    <property>
>      <name>hbase.zookeeper.property.clientPort</name>
>      <value>2181</value>
>      <description>
>                Property from ZooKeeper's config zoo.cfg.
>                The port at which the clients will connect.
>      </description>
>    </property>
>    <property>
>      <name>hbase.zookeeper.quorum</name>
>      <value>namenode, jobtracker, slave0</value>
>      <description>
>        Comma separated list of servers in the ZooKeeper Quorum.
>        For example, "host1.mydomain.com,host2.mydomain.com,host3.mydomain.com".
>        By default this is set to localhost for local and pseudo-distributed modes
>        of operation. For a fully-distributed setup, this should be set to a full