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https://issues.apache.org/jira/browse/HIVE-21237?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16935733#comment-16935733
 ] 

Dawood commented on HIVE-21237:
-------------------------------

Getting the same error even after removing metastore_db
{noformat}
[root@hive apache-hive-2.3.6-bin]# rm -rf ${HIVE_HOME}/metastore_db

[root@hive apache-hive-2.3.6-bin]# bin/schematool -dbType derby -initSchema 
--verbose
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in 
[jar:file:/opt/apache-hive-2.3.6-bin/lib/log4j-slf4j-impl-2.6.2.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in 
[jar:file:/opt/hadoop-3.2.0/share/hadoop/common/lib/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.apache.logging.slf4j.Log4jLoggerFactory]
Metastore connection URL:        jdbc:derby://hive:1527/metastore_db;create=true
Metastore Connection Driver :    org.apache.derby.jdbc.ClientDriver
Metastore connection User:       APP
Starting metastore schema initialization to 2.3.0
Initialization script hive-schema-2.3.0.derby.sql
Connecting to jdbc:derby://hive:1527/metastore_db;create=true
Connected to: Apache Derby (version 10.15.1.3 - (1853019))
Driver: Apache Derby Network Client JDBC Driver (version 10.11.1.1 - (1616546))
Transaction isolation: TRANSACTION_READ_COMMITTED
0: jdbc:derby://hive:1527/metastore_db> !autocommit on
Autocommit status: true
0: jdbc:derby://hive:1527/metastore_db> CREATE FUNCTION "APP"."NUCLEUS_ASCII" 
(C CHAR(1)) RETURNS INTEGER LANGUAGE JAVA PARAMETER STYLE JAVA READS SQL DATA 
CALLED ON NULL INPUT EXTERNAL NAME 
'org.datanucleus.store.rdbms.adapter.DerbySQLFunction.ascii'
Error: FUNCTION 'NUCLEUS_ASCII' already exists. (state=X0Y68,code=30000)
Closing: 0: jdbc:derby://hive:1527/metastore_db;create=true
org.apache.hadoop.hive.metastore.HiveMetaException: Schema initialization 
FAILED! Metastore state would be inconsistent !!
Underlying cause: java.io.IOException : Schema script failed, errorcode 2
org.apache.hadoop.hive.metastore.HiveMetaException: Schema initialization 
FAILED! Metastore state would be inconsistent !!
        at 
org.apache.hive.beeline.HiveSchemaTool.doInit(HiveSchemaTool.java:590)
        at 
org.apache.hive.beeline.HiveSchemaTool.doInit(HiveSchemaTool.java:563)
        at org.apache.hive.beeline.HiveSchemaTool.main(HiveSchemaTool.java:1145)
        at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        at org.apache.hadoop.util.RunJar.run(RunJar.java:323)
        at org.apache.hadoop.util.RunJar.main(RunJar.java:236)
Caused by: java.io.IOException: Schema script failed, errorcode 2
        at 
org.apache.hive.beeline.HiveSchemaTool.runBeeLine(HiveSchemaTool.java:980)
        at 
org.apache.hive.beeline.HiveSchemaTool.runBeeLine(HiveSchemaTool.java:959)
        at 
org.apache.hive.beeline.HiveSchemaTool.doInit(HiveSchemaTool.java:586)
        ... 8 more
*** schemaTool failed ***
{noformat}
[~yumwang] Could you please share me the document or a right link to refer - 
configuring Hive on top of Hadoop node.

> [JDK 11] SessionState can't be initialized due to classloader problem
> ---------------------------------------------------------------------
>
>                 Key: HIVE-21237
>                 URL: https://issues.apache.org/jira/browse/HIVE-21237
>             Project: Hive
>          Issue Type: Sub-task
>    Affects Versions: 3.1.1
>         Environment: JDK11, Hadoop-3, Hive 3.1.1
>            Reporter: Uma Maheswara Rao G
>            Priority: Major
>
> When I start Hive with JDK11
> {{2019-02-08 22:29:51,500 INFO SessionState: Hive Session ID = 
> cecd9c34-d61a-44d0-9e52-a0a7d6413e49
> Exception in thread "main" java.lang.ClassCastException: class 
> jdk.internal.loader.ClassLoaders$AppClassLoader cannot be cast to class 
> java.net.URLClassLoader (jdk.internal.loader.ClassLoaders$AppClassLoader and 
> java.net.URLClassLoader are in module java.base of loader 'bootstrap')
>         at 
> org.apache.hadoop.hive.ql.session.SessionState.<init>(SessionState.java:410)
>         at 
> org.apache.hadoop.hive.ql.session.SessionState.<init>(SessionState.java:386)
>         at 
> org.apache.hadoop.hive.cli.CliSessionState.<init>(CliSessionState.java:60)
>         at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:705)
>         at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:683)
>         at 
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at 
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>         at 
> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>         at java.base/java.lang.reflect.Method.invoke(Method.java:566)
>         at org.apache.hadoop.util.RunJar.run(RunJar.java:323)
>         at org.apache.hadoop.util.RunJar.main(RunJar.java:236)}}



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