On the client try something like "echo stat|nc <host> 2181" where host
is the ZK server. If you get something back that means the ZooKeeper
portion of the communication at least is working properly.
http://bit.ly/dglVld I can't comment on what else is going on at the
hbase level though.
Patrick
George Stathis wrote:
This has come up
before<http://mail-archives.apache.org/mod_mbox/hadoop-hbase-user/200909.mbox/%3c587903.6843...@web65509.mail.ac4.yahoo.com%3e>but
I'm still unclear as to whether this is possible or not: remotely
connecting to an EC2 instance using the Java client library. It's not for
production purposes; we have developed a DAO layer with the HBase Java API
and it works great when the app lives on the same machine as HBase (e.g. our
development laptops). We now want to setup a continuous build process to run
our unit tests. We already have a build machine that does not live on EC2
(we had it from before). That machine is too small to run HBase, even in
pseudo-distributed mode, but it can still compile the code. So the thought
is to have the machine run the build and point to a remote EC2 dev instance
of HBase for unit testing.
Now, I have gone though a lot of threads and posts and have opened up all
required ports (I think) on EC2: 60000, 60020 and 2181 (I can telnet into
them). I have one test EC2 instance running in pseudo-distributed mode to
test the remote connection. I attempt to run a single unit test. From the
client side, I see:
[...]
2010-03-19 10:29:18,449 INFO [ClientCnxn - 869] - Attempting connection to
server /184.73.xxx.yyy:2181
2010-03-19 10:29:18,496 INFO [ClientCnxn - 785] - Priming connection to
java.nio.channels.SocketChannel[connected
local=/192.168.1.16:55145remote=/184.73.xxx.yyy:2181]
2010-03-19 10:29:18,498 INFO [ClientCnxn - 937] - Server connection
successful
[...]
and on the EC2 instance zookeeper logs, I see:
[...]
2010-03-19 10:29:18,512 INFO org.apache.zookeeper.server.NIOServerCnxn:
Connected to /71.174.www.zzz:55145 lastZxid 0
2010-03-19 10:29:18,512 INFO org.apache.zookeeper.server.NIOServerCnxn:
Creating new session 0x12776cfdefd0003
2010-03-19 10:29:18,516 INFO org.apache.zookeeper.server.NIOServerCnxn:
Finished init of 0x12776cfdefd0003 valid:true
[...]
So some connection handshake is established. Then, nothing. It just hangs.
Any suggestions on where to go from here or am I fighting a losing battle?
Thank you in advance for your time.
-GS
