Spark tries to connect to localhost instead of configured servers - hadoop

Question

This error information shows up:
Error in query: org.apache.hadoop.hive.ql.metadata.HiveException: MetaException(message:Got exception: java.net.ConnectException Call From undefined.hostname.localhost/192.168.xx.xxx to localhost:9000 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused);
I don't understand why I will visit the localhost:9000, the host in my core-site.xml is hdfs://192.168.xx.xx:9000, why did I visit localhost:9000
Is it the default host?

Answer 1

Please make sure that hive-site.xml is present in your spark config directory /etc/spark/conf/ and configure the hive configuration settings.
## core-site.xml
fs.defaultFS
## Hive config
hive.metastore.uris

Answer 2

In hive-site.xml, you can configure the as follows. Please configure your hive meta-store details.
<property>
<name>fs.defaultFS</name>
<value>hdfs://ip-xx.xx.xx.xx:8020</value>
</property>
<property>
<name>hive.metastore.uris</name>
<value>thrift://ip-xx.xx.xx:9083</value>
</property>
<property>
<name>javax.jdo.option.ConnectionURL</name>
<value>jdbc:mysql://localhost/metastorecreateDatabase
IfNotExist=true</value>
<description>metadata is stored in a MySQL server</description>
</property>
<property>
<name>javax.jdo.option.ConnectionDriverName</name>
<value>com.mysql.jdbc.Driver</value>
<description>MySQL JDBC driver class</description>
</property>
<property>
<name>javax.jdo.option.ConnectionUserName</name>
<value>hive</value>
<description>user name for connecting to mysql server </description>
</property>
<property>
<name>javax.jdo.option.ConnectionPassword</name>
<value>123456</value>
<description>password for connecting to mysql server </description>
</property>
</configuration>

Answer 3

Your error is related to HDFS, not Hive or SparkSQL
You need to ensure that your HADOOP_HOME or HADOOP_CONF_DIR are correctly setup in the spark-env.sh if you would like to connect to the correct Hadoop environment rather than use the defaults.

Answer 4

I reset the metastore in Mysql. I use the localhost in my core-site.xml at that time, I init my metastore.So I reset the metastore, and the problem solved.

Answer 5

First,go to the mysql command line，drop the database(metastore) which you set in your hive-site.xml.
Then,change dictory to the $HIVE_HOME/bin,execute schematool -initSchema -dbType mysql, and the problem is solved.the error due to the metastore in mysql is too late(I have set the metastore in standby environments),I turn to the cluster environment later, but the metastore is previous, so I can create table in hive,not in sparksql.
Thank someone who helps me.#Ravikumar,#cricket_007