Mailing-List: contact issues-help@hbase.apache.org; run by ezmlm
Precedence: bulk
MIME-Version: 1.0
Date: Fri, 27 May 2016 14:53:27 +0200
Message-ID: <CAPSYivf=ET42rASUCXRn9OXuSTySdHMw2NXB42xVU9BrtM+W=w@mail.gmail.com>
Subject: exception not descriptive relationed to zookeeper.znode.parent
From: Pablo Leira <pleira@denodo.com>
To: issues@hbase.apache.org
Content-Type: multipart/alternative; boundary=001a113f254a9793190533d26475
archived-at: Sat, 28 May 2016 15:45:33 -0000

--001a113f254a9793190533d26475
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

Hi,

I have just updated a client of hbase from version 0.96.2-hadoop2 to 1.2.1
(hbase-client).
With the old version with the property zookeeper.znode.parent of the file
hbase-site.xml bad configured (p.e. with the value "hbase" instead of
"hbase-secure"
our "hbase-unsecure" )  . I was obtaining the following error:

=E2=80=9CThe node /hbase (/hbase-unsecure or /hbase-secure) is not in ZooKe=
eper. It
should have been written by the master. Check the value configured in
'zookeeper.znode.parent'. There could be a mismatch with the one configured
in the master.=E2=80=9C


But with the new version I was obtaining the following trace:

java.lang.RuntimeException: java.lang.NullPointerException at
org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithoutRetries(RpcRetr=
yingCaller.java:208)
at
org.apache.hadoop.hbase.client.ClientScanner.call(ClientScanner.java:326)
at
org.apache.hadoop.hbase.client.ClientScanner.nextScanner(ClientScanner.java=
:301)
at
org.apache.hadoop.hbase.client.ClientScanner.initializeScannerInConstructio=
n(ClientScanner.java:166)
at
org.apache.hadoop.hbase.client.ClientScanner.<init>(ClientScanner.java:161)
at org.apache.hadoop.hbase.client.HTable.getScanner(HTable.java:794) at
org.apache.hadoop.hbase.MetaTableAccessor.fullScan(MetaTableAccessor.java:6=
02)
at
org.apache.hadoop.hbase.MetaTableAccessor.tableExists(MetaTableAccessor.jav=
a:366)
at
org.apache.hadoop.hbase.client.HBaseAdmin.tableExists(HBaseAdmin.java:403)
at
com.denodo.connect.hadoop.hbase.HBaseConnector.doRun(HBaseConnector.java:19=
8)
at
com.denodo.connect.hadoop.hdfs.wrapper.AbstractSecureHadoopWrapper.run(Abst=
ractSecureHadoopWrapper.java:110)
at com.denodo.vdb.misc.datasource.MyDataSource$1$1.doRun(Unknown Source) at
com.denodo.vdb.engine.wrapper.raw.my.MyAccessImpl.doRun(Unknown Source) at
com.denodo.vdb.engine.wrapper.RawAccess.run(Unknown Source) at
com.denodo.vdb.engine.thread.g.a(Unknown Source) at
com.denodo.vdb.engine.thread.ReusableThread.run(Unknown Source) Caused by:
java.lang.NullPointerException at
org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.getMetaReplicaNodes(ZooK=
eeperWatcher.java:489)
at
org.apache.hadoop.hbase.zookeeper.MetaTableLocator.blockUntilAvailable(Meta=
TableLocator.java:558)
at
org.apache.hadoop.hbase.client.ZooKeeperRegistry.getMetaRegionLocation(ZooK=
eeperRegistry.java:61)
at
org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation.=
locateMeta(ConnectionManager.java:1211)
at
org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation.=
locateRegion(ConnectionManager.java:1178)
at
org.apache.hadoop.hbase.client.RpcRetryingCallerWithReadReplicas.getRegionL=
ocations(RpcRetryingCallerWithReadReplicas.java:305)
at
org.apache.hadoop.hbase.client.ScannerCallableWithReplicas.call(ScannerCall=
ableWithReplicas.java:156)
at
org.apache.hadoop.hbase.client.ScannerCallableWithReplicas.call(ScannerCall=
ableWithReplicas.java:60)
at
org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithoutRetries(RpcRetr=
yingCaller.java:200)
... 15 more


This is my code:


final Configuration hbaseConfig =3D getHBaseConfig(inputValues); /**
Connection to the cluster. A single connection shared by all application
threads. */ Connection connection =3D null; /** A lightweight handle to a
specific table. Used from a single thread. */ Table table =3D null; try {
final TableName tableName =3D
TableName.valueOf(inputValues.get(ParameterNaming.CONF_TABLE_NAME));
connection =3D ConnectionFactory.createConnection(hbaseConfig); Admin admin=
 =3D
connection.getAdmin(); if (!admin.tableExists(tableName)) {


The last line where the exception is thrown.

Are there any way to obtain a exception more specific than
NullPointerException, because in the previous version this exception it was
more descriptive. Or maybe my code is not correct.

Thanks
Regards
Pablo

--001a113f254a9793190533d26475--