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ClassNotFoundException when use hive java client of hive + hbase integration
Cheng Su 2012-11-05, 14:53
Hi, all. I have a hive+hbase integration cluster.

When I try to execute query through the java client of hive, sometimes
a ClassNotFoundException happens.

My java code :

final Connection conn = DriverManager.getConnection(URL);
final ResultSet rs = conn.executeQuery("SELECT count(*) FROM
test_table WHERE (source = '0' AND ur_createtime BETWEEN
'20121031000000' AND '20121031235959')");

I can execute the sql:SELECT count(*) FROM test_table WHERE (source '0' AND ur_createtime BETWEEN '20121031000000' AND '20121031235959')
in hive cli mode, and get the query result, so there is no error in my
sql.

The client side exception:

Caused by: java.sql.SQLException: Query returned non-zero code: 9,
cause: FAILED: Execution Error, return code 2 from
org.apache.hadoop.hive.ql.exec.MapRedTask
    at org.apache.hadoop.hive.jdbc.HiveStatement.executeQuery(HiveStatement.java:189)
... 23 more

The server side exception(hadoop-jobtracker):

2012-11-05 18:55:39,443 INFO org.apache.hadoop.mapred.TaskInProgress:
Error from attempt_201210301133_0112_m_000000_3: java.io.IOException:
Cannot create an instance of InputSplit class org.apache.hadoop.hive.hbase.HBaseSplit:org.apache.hadoop.hive.hbase.HBaseSplit
    at org.apache.hadoop.hive.ql.io.HiveInputFormat$HiveInputSplit.readFields(HiveInputFormat.java:146)
    at org.apache.hadoop.io.serializer.WritableSerialization$WritableDeserializer.deserialize(WritableSerialization.java:67)
    at org.apache.hadoop.io.serializer.WritableSerialization$WritableDeserializer.deserialize(WritableSerialization.java:40)
    at org.apache.hadoop.mapred.MapTask.getSplitDetails(MapTask.java:396)
    at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:412)
    at org.apache.hadoop.mapred.MapTask.run(MapTask.java:372)
    at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Unknown Source)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1059)
    at org.apache.hadoop.mapred.Child.main(Child.java:249)
Caused by: java.lang.ClassNotFoundException:
org.apache.hadoop.hive.hbase.HBaseSplit
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Unknown Source)
    at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:819)
    at org.apache.hadoop.hive.ql.io.HiveInputFormat$HiveInputSplit.readFields(HiveInputFormat.java:143)
    ... 10 more
My hive-env.sh

export HIVE_AUX_JARS_PATH=/data/install/hive-0.9.0/lib/hive-hbase-handler-0.9.0.jar,/data/install/hive-0.9.0/lib/hbase-0.92.0.jar,/data/install/hive-0.9.0/lib/zookeeper-3.4.2.jar
My hive-site.xml

<property>
    <name>hive.zookeeper.quorum</name>
    <value>hadoop01,hadoop02,hadoop03</value>
    <description>The list of zookeeper servers to talk to. This is
only needed for read/write locks.</description>
</property>
And I start thrift service as below:

hive --service hiveserver -p 10000 &
The server side error log says that HBaseSplit is not found. But why?
How can I fix this?

--

Regards,
Cheng Su