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Date: Fri, 17 Feb 2012 15:03:39 +0800
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Subject: Re: ERROR zookeeper.RecoverableZooKeeper: ZooKeeper exists failed
 after 3 retries
From: Bing Li <lblabs@gmail.com>
To: user@hbase.apache.org
Cc: hbase-user@hadoop.apache.org
Content-Type: multipart/alternative; boundary=bcaec55239725888d604b9238b64

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Hi, J-D,

I just made summary about the experiences to set up a pseudo-distributed
mode HBase.

1) RedHat 9 is not suitable for running HBase and Hadoop. I don't know the
reasons. Now Ubuntu is my choice.

2) After the pseudo-distributed mode of HDFS is configured, it is required
to configure the hbase-env.sh and hbase-site.xml. The book, HBase the
Definitive Guide, does not mentions hbase.env.xml.

3) It should set up JAVA_HOME, HBASE_CLASSPATH and HBASE_MANAGES_ZK. My
hbase-env.sh is as follows.

     export JAVA_HOME=/opt/jdk1.6.1/
     export HBASE_CLASSPATH=/opt/hbase-0.92.0/conf
     export HBASE_OPTS="-XX:+UseConcMarkSweepGC"
     export HBASE_MANAGES_ZK=true

4) When configuring hbase-site.xml, the property,
hbase.cluster.distributed, must be set also. The book, HBase the Definitive
Guide, does not do that either. My hbase-site.xml is as follows.

     <?xml version="1.0"?>
     <?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
     <configuration>
        <property>
           <name>hbase.rootdir</name>
           <value>hdfs://localhost:9000/hbase</value>
        </property>
        <property>
           <name>dfs.replication</name>
           <value>1</value>
        </property>
        <property>
           <name>hbase.cluster.distributed</name>
           <value>true</value>
        </property>
     </configuration>

I am a new user of HBase. Your suggestions are highly appreciated.

Best regards,
Bing

On Wed, Feb 15, 2012 at 2:43 AM, Jean-Daniel Cryans <jdcryans@apache.org>wrote:

> And what would be missing? It's all open source so this is the moment
> where you can forever leave a trace in HBase :)
>
> J-D
>
> On Tue, Feb 14, 2012 at 12:35 AM, Bing Li <lblabs@gmail.com> wrote:
> > Dear Jean-Daniel,
> >
> > The issue is solved. I think the book in the HBase the Definitive Guide
> > does not give sufficient descriptions about the pseudo-distributed mode.
> >
> > Thanks so much!
> > Bing
> >
> > On Tue, Feb 14, 2012 at 7:27 AM, Jean-Daniel Cryans <jdcryans@apache.org
> >wrote:
> >
> >> Is zookeeper running properly? Is it where your shell expects it to
> >> be? Can you access HBase's web ui on port 60010?
> >>
> >> J-D
> >>
> >> On Sun, Feb 12, 2012 at 1:00 PM, Bing Li <lblabs@gmail.com> wrote:
> >> > Dear all,
> >> >
> >> > I am a new learner of HBase. I tried to set up my HBase on a
> >> > pseudo-distributed HDFS.
> >> >
> >> > After starting HDFS by running ./start-dfs.sh and ./start-hbase.sh, I
> >> > started the HBase shell.
> >> >
> >> >   ./hbase shell
> >> >
> >> > It was started properly. However, when I typed the command, status, as
> >> > follows.
> >> >
> >> >   hbase(main):001:0> status
> >> >
> >> > It got the following exception. Since I had very limited experiences
> to
> >> use
> >> > HBase, I could not figure out what the problem was.
> >> >
> >> > SLF4J: Class path contains multiple SLF4J bindings.
> >> > SLF4J: Found binding in
> >> >
> >>
> [jar:file:/opt/hbase-0.92.0/lib/slf4j-log4j12-1.5.8.jar!/org/slf4j/impl/StaticLoggerBinder.class]
> >> > SLF4J: Found binding in
> >> >
> >>
> [jar:file:/opt/hadoop-1.0.0/lib/slf4j-log4j12-1.4.3.jar!/org/slf4j/impl/StaticLoggerBinder.class]
> >> > SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an
> >> > explanation.
> >> > 12/02/13 04:34:01 ERROR zookeeper.RecoverableZooKeeper: ZooKeeper
> exists
> >> > failed after 3 retries
> >> > 12/02/13 04:34:01 WARN zookeeper.ZKUtil: hconnection Unable to set
> >> watcher
> >> > on znode /hbase/master
> >> > org.apache.zookeeper.KeeperException$ConnectionLossException:
> >> > KeeperErrorCode = ConnectionLoss for /hbase/master
> >> >        at
> >> > org.apache.zookeeper.KeeperException.create(KeeperException.java:99)
> >> >        at
> >> > org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
> >> >        at org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:1003)
> >> >        at
> >> >
> >>
> org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.exists(RecoverableZooKeeper.java:154)
> >> >        at
> >> >
> >>
> org.apache.hadoop.hbase.zookeeper.ZKUtil.watchAndCheckExists(ZKUtil.java:226)
> >> >        at
> >> >
> >>
> org.apache.hadoop.hbase.zookeeper.ZooKeeperNodeTracker.start(ZooKeeperNodeTracker.java:76)
> >> >        at
> >> >
> >>
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.setupZookeeperTrackers(HConnectionManager.java:580)
> >> >        at
> >> >
> >>
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.<init>(HConnectionManager.java:569)
> >> >        at
> >> >
> >>
> org.apache.hadoop.hbase.client.HConnectionManager.getConnection(HConnectionManager.java:186)
> >> >        at
> >> > org.apache.hadoop.hbase.client.HBaseAdmin.<init>(HBaseAdmin.java:98)
> >> >        at
> sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
> >> > Method)
> >> >        at
> >> >
> >>
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
> >> >        at
> >> >
> >>
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
> >> >        at
> java.lang.reflect.Constructor.newInstance(Constructor.java:513)
> >> >        at
> >> >
> >>
> org.jruby.javasupport.JavaConstructor.newInstanceDirect(JavaConstructor.java:275)
> >> >        at
> >> >
> >>
> org.jruby.java.invokers.ConstructorInvoker.call(ConstructorInvoker.java:91)
> >> >        at
> >> >
> >>
> org.jruby.java.invokers.ConstructorInvoker.call(ConstructorInvoker.java:178)
> >> >        at
> >> >
> >>
> org.jruby.runtime.callsite.CachingCallSite.cacheAndCall(CachingCallSite.java:322)
> >> >        at
> >> >
> >>
> org.jruby.runtime.callsite.CachingCallSite.callBlock(CachingCallSite.java:178)
> >> >        at
> >> >
> org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:182)
> >> >        at
> >> >
> >>
> org.jruby.java.proxies.ConcreteJavaProxy$2.call(ConcreteJavaProxy.java:47)
> >> >        at
> >> >
> >>
> org.jruby.runtime.callsite.CachingCallSite.cacheAndCall(CachingCallSite.java:322)
> >> >
> >> > Could you please give me a hand? Thanks so much!
> >> >
> >> > Best regards,
> >> > Bing
> >>
>

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