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From Pal Konyves <paul.kony...@gmail.com>
Subject HBase client hangs after connecting to Zookeeper in pseudo-mode
Date Wed, 20 Mar 2013 00:02:20 GMT

I'm new to the list, just registered for this question.

I'm setting up HBase in pseudo-distributed mode. I can run the hbase
shell locally, and create tables, put some rows, they are present in
the HDFS good.
However, when I try to connect either from the same machine or the
host machine (the HBase setup is on a VM), the client hangs after
connecting to ZooKeeper.

The console output is:

13/03/20 00:20:36 INFO zookeeper.ClientCnxn: Opening socket connection to server
 debian-vm/ Will not attempt to authenticate using SASL (unkn
own error)
13/03/20 00:20:36 INFO zookeeper.ClientCnxn: Socket connection established to de
bian-vm/, initiating session
13/03/20 00:20:36 INFO zookeeper.ClientCnxn: Session establishment complete on s
erver debian-vm/, sessionid = 0x13d84e02e920005, negotiated ti
meout = 180000
 [..then waits forever, then after forever shows:]
org.apache.hadoop.hbase.client.NoServerForRegionException: Unable to find regio
 for stops,,99999999999999 after 10 tries.

I checked the following pitfalls:
-- My HBase 94.4 build is compatible with my Hadoop 1.0.4 according to
HBase documentation
-- I put 'vm-debian' (the hostname I want to identify my virtual
machine that runs the HBase setup) into the host and virtual machine's
/etc/host file to map the hostname nicely (and it works, because
browser shows Hadoop and HBase info pages)
-- I copied the hadoop related jars from hadoop root and hadoop/lib
into HBase/lib (although they were the same version, but I could never
-- I set up the time on the virtual machine where the HBase setup runs
properly, no time shifts
-- I checked the logs and web UIs to see every processes are running:
Hadoop, HBase master, Zookeeper

HBase install is a Debian 32 bit virtual machine, with JDK 1.7.0_17
Host machine is Windows 7 with JDK 1.7.0_05

but the client program does not work regardless if it's running on the
HBase VM or on the host

The tiny client is:

here are the config files:

Please help and tell me what I do wrong, because it has been driving
me crazy for about 3 days, and I'm getting very angry about this whole
Hadoop stuff, that I cannot even get running a very basic use-case
with it.


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