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Date: Tue, 17 Apr 2012 15:34:35 +0200
From: Marcin Cylke <mcl.hbase@touk.pl>
Organization: TouK
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To: user@hbase.apache.org
CC: Alex Baranau <alex.baranov.v@gmail.com>
Subject: Re: hbase coprocessor unit testing
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On 17/04/12 15:15, Alex Baranau wrote:

Hi

> Some sanity checks:
> 1) make sure you don't have 127.0.1.1 in your /etc/hosts (only 127.0.0.1)

I've removed this entry and it worked right away :) Could You explain
why it did so big difference?

Now the test from HBaseHUT works fine, but mine code is still failing:

#v+
2012-04-17 15:26:27,870 [localhost:2222)] WARN  ClientCnxn
      :1063 - Session 0x0 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.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:286)
	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1041)
2012-04-17 15:26:27,871 [dler 2 on 35003] INFO  RecoverableZooKeeper
      :89 - The identifier of this process is 2032@correspondence
2012-04-17 15:26:27,973 [dler 2 on 35003] WARN  RecoverableZooKeeper
      :159 - Possibly transient ZooKeeper exception:
org.apache.zookeeper.KeeperException$ConnectionLossException:
KeeperErrorCode = ConnectionLoss for /hbase/master
2012-04-17 15:26:27,974 [dler 2 on 35003] INFO  RetryCounter
      :53 - The 1 times to retry  after sleeping 2000 ms
2012-04-17 15:26:28,973 [localhost:2222)] INFO  ClientCnxn
      :933 - Opening socket connection to server localhost/127.0.0.1:2222
#v-

My whole test is something like this:

#v+
 testingUtility.getConfiguration().setStrings(
           CoprocessorHost.USER_REGION_COPROCESSOR_CONF_KEY,
           AuxDataCalculator.class.getName());
 testingUtility.startMiniCluster();

byte[] TABLE = Bytes.toBytes(getClass().getName());
byte[] A = Bytes.toBytes("A");
byte[] STATS = Bytes.toBytes("stats");
byte[] CONTENT = Bytes.toBytes("content");
byte[][] FAMILIES = new byte[][] { A, STATS, CONTENT } ;

HTable hTable = testingUtility.createTable(TABLE, FAMILIES);
Put put = new Put(ROW);
put.add(A, A, A);

hTable.put(put);

Get get = new Get(ROW);
Result result = hTable.get(get);
#v-


As I don't see any particular differences between Your unit test and
mine, could You look into this a bit more?

Regards
Marcin