java.net.ConnectException

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tip

host port isnt set

tip

Check if your MongoDB is available.


rp
tip

To restart the Selenium Webdriver mock browser in a testcase, first use 'driver.close()' and then reinstantiate the driver.

tip

Firewall might be blocking your connection, or MySQL it's not running on your server machine.


rafael
tip

Check if you have started your server, or if your server is set to listen to the port you're trying to connect and is waiting to accept connections and check if the firewall isn't blocking your connection.


rafael
tip

Check if ip adress is correct, if the port is correct, and if the server is up and running and waiting for connections. Also, check if there's no firewall blocking you and if your internet connection is working.


rafael
tip

spring-data-redis requires redis 2.6+ to work properly.

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  • In the case that hiveserver2 uses embedded metastore and hiveserver uses remote metastore, this exception comes up when hiveserver2 and hiveserver are started simultaneously. metastore service status is running but when I launch hive cli, I get following metastore connection error: C:\apps\dist\hive-0.13.0.2.1.2.0-1660\bin>hive.cmd {noformat} 14/05/09 17:40:03 WARN conf.HiveConf: DEPRECATED: hive.metastore.ds.retry.* no l onger has any effect. Use hive.hmshandler.retry.* instead Logging initialized using configuration in file:/C:/apps/dist/hive-0.13.0.2.1.2. 0-1660/conf/hive-log4j.properties Exception in thread "main" java.lang.RuntimeException: java.lang.RuntimeExceptio n: Unable to instantiate org.apache.hadoop.hive.metastore.HiveMetaStoreClient at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.jav a:347) at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:681) at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:625) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl. java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces sorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at org.apache.hadoop.util.RunJar.main(RunJar.java:212) Caused by: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.h ive.metastore.HiveMetaStoreClient at org.apache.hadoop.hive.metastore.MetaStoreUtils.newInstance(MetaStore Utils.java:1413) at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.<init>(Retry ingMetaStoreClient.java:62) at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.getProxy(Ret ryingMetaStoreClient.java:72) at org.apache.hadoop.hive.ql.metadata.Hive.createMetaStoreClient(Hive.ja va:2444) at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:2456) at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.jav a:341) ... 7 more Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstruct orAccessorImpl.java:57) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingC onstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:525) at org.apache.hadoop.hive.metastore.MetaStoreUtils.newInstance(MetaStore Utils.java:1411) ... 12 more Caused by: MetaException(message:Could not connect to meta store using any of th e URIs provided. Most recent failure: org.apache.thrift.transport.TTransportExce ption: java.net.ConnectException: Connection refused: connect at org.apache.thrift.transport.TSocket.open(TSocket.java:185) at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.open(HiveMetaSto reClient.java:336) at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.<init>(HiveMetaS toreClient.java:214) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstruct orAccessorImpl.java:57) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingC onstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:525) at org.apache.hadoop.hive.metastore.MetaStoreUtils.newInstance(MetaStore Utils.java:1411) at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.<init>(Retry ingMetaStoreClient.java:62) at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.getProxy(Ret ryingMetaStoreClient.java:72) at org.apache.hadoop.hive.ql.metadata.Hive.createMetaStoreClient(Hive.ja va:2444) at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:2456) at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.jav a:341) at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:681) at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:625) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl. java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces sorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at org.apache.hadoop.util.RunJar.main(RunJar.java:212) Caused by: java.net.ConnectException: Connection refused: connect at java.net.TwoStacksPlainSocketImpl.socketConnect(Native Method) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.ja va:339) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocket Impl.java:200) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java :182) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:157) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:391) at java.net.Socket.connect(Socket.java:579) at org.apache.thrift.transport.TSocket.open(TSocket.java:180) ... 19 more ) at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.open(HiveMetaSto reClient.java:382) at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.<init>(HiveMetaS toreClient.java:214) ... 17 more {noformat} Because of this issue, we are seeing many failures in hive related system tests.
    via by Xiaobing Zhou,
    • java.net.ConnectException: Connection refused at org.apache.thrift.transport.TSocket.open(TSocket.java:185) at org.apache.zeppelin.interpreter.remote.ClientFactory.create(ClientFactory.java:51) Caused by: java.net.ConnectException: Connection refused at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) at java.net.Socket.connect(Socket.java:579) at org.apache.thrift.transport.TSocket.open(TSocket.java:180) ... 2 more

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