I encounter the following error when trying to connect to a database using SQuirreLSQL.
Error :
Unexpected Error occured attempting to open an SQL connection
Stacktrace :
java.util.concurrent.ExecutionException: java.lang.RuntimeException: java.lang.ClassNotFoundException: com.microsoft.sqlserver.jdbc.SQLServerDriver
at java.util.concurrent.FutureTask.report(FutureTask.java:122)
at java.util.concurrent.FutureTask.get(FutureTask.java:202)
at net.sourceforge.squirrel_sql.client.mainframe.action.OpenConnectionCommand.awaitConnection(OpenConnectionCommand.java:132)
at net.sourceforge.squirrel_sql.client.mainframe.action.OpenConnectionCommand.access$100(OpenConnectionCommand.java:45)
at net.sourceforge.squirrel_sql.client.mainframe.action.OpenConnectionCommand$2.run(OpenConnectionCommand.java:115)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: com.microsoft.sqlserver.jdbc.SQLServerDriver
at net.sourceforge.squirrel_sql.client.mainframe.action.OpenConnectionCommand.executeConnect(OpenConnectionCommand.java:175)
at net.sourceforge.squirrel_sql.client.mainframe.action.OpenConnectionCommand.access$000(OpenConnectionCommand.java:45)
at net.sourceforge.squirrel_sql.client.mainframe.action.OpenConnectionCommand$1.run(OpenConnectionCommand.java:104)
... 5 more
Caused by: java.lang.ClassNotFoundException: com.microsoft.sqlserver.jdbc.SQLServerDriver
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at net.sourceforge.squirrel_sql.fw.util.MyURLClassLoader.findClass(MyURLClassLoader.java:209)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:270)
at net.sourceforge.squirrel_sql.fw.sql.SQLDriverManager.getConnection(SQLDriverManager.java:128)
at net.sourceforge.squirrel_sql.client.mainframe.action.OpenConnectionCommand.executeConnect(OpenConnectionCommand.java:167)
... 7 more
I also tried to check Driver Properties and the following error is displayed :
Loading JDBC driver "Microsoft MSSQL Server JDBC Driver" failed.
Can not load driver properties tab.
You need to copy driver into squirrel-sql/lib folder.
I've had same issue with MySql driver.
After copied drived into:
$HOME/squirrel-sql-3.7/lib/mysql-connector-java-3.0.17-ga-bin.jar
and restart Squirrel - there was no error anymore.
Related
I got the below error :
org.apache.hive.service.cli.HiveSQLException: Error running query:
java.lang.NoClassDefFoundError: org/apache/tez/runtime/api/Event
at org.apache.hive.jdbc.Utils.verifySuccess(Utils.java:266)
at org.apache.hive.jdbc.Utils.verifySuccessWithInfo(Utils.java:252)
at org.apache.hive.jdbc.HiveStatement.runAsyncOnServer(HiveStatement.java:309)
at org.apache.hive.jdbc.HiveStatement.execute(HiveStatement.java:250)
at org.apache.hive.jdbc.HiveStatement.executeQuery(HiveStatement.java:434)
at HiveRead.(HiveRead.java:37)
at HiveRead.main(HiveRead.java:24)
Caused by: org.apache.hive.service.cli.HiveSQLException: Error running query: java.lang.NoClassDefFoundError:
org/apache/tez/runtime/api/Event
at org.apache.hive.service.cli.operation.SQLOperation.prepare(SQLOperation.java:225)
at org.apache.hive.service.cli.operation.SQLOperation.runInternal(SQLOperation.java:276)
at org.apache.hive.service.cli.operation.Operation.run(Operation.java:324)
at org.apache.hive.service.cli.session.HiveSessionImpl.executeStatementInternal(HiveSessionImpl.java:499)
at org.apache.hive.service.cli.session.HiveSessionImpl.executeStatementAsync(HiveSessionImpl.java:486)
at org.apache.hive.service.cli.CLIService.executeStatementAsync(CLIService.java:295)
at org.apache.hive.service.cli.thrift.ThriftCLIService.ExecuteStatement(ThriftCLIService.java:506)
at org.apache.hive.service.rpc.thrift.TCLIService$Processor$ExecuteStatement.getResult(TCLIService.java:1437)
at org.apache.hive.service.rpc.thrift.TCLIService$Processor$ExecuteStatement.getResult(TCLIService.java:1422)
at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:39)
at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:39)
at org.apache.hive.service.auth.TSetIpAddressProcessor.process(TSetIpAddressProcessor.java:56)
at org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:286)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NoClassDefFoundError: org/apache/tez/runtime/api/Event
at org.apache.hadoop.hive.ql.parse.TezCompiler.runStatsDependentOptimizations(TezCompiler.java:282)
at org.apache.hadoop.hive.ql.parse.TezCompiler.optimizeOperatorPlan(TezCompiler.java:133)
at org.apache.hadoop.hive.ql.parse.TaskCompiler.compile(TaskCompiler.java:134)
at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.analyzeInternal(SemanticAnalyzer.java:10947)
at org.apache.hadoop.hive.ql.parse.CalcitePlanner.analyzeInternal(CalcitePlanner.java:246)
at org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:250)
at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:477)
at org.apache.hadoop.hive.ql.Driver.compileInternal(Driver.java:1242)
at org.apache.hadoop.hive.ql.Driver.compileAndRespond(Driver.java:1229)
at org.apache.hive.service.cli.operation.SQLOperation.prepare(SQLOperation.java:191)
... 15 more
Caused by: java.lang.ClassNotFoundException: org.apache.tez.runtime.api.Event
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 25 more
org.apache.hive.service.cli.HiveSQLException: Error running query: java.lang.NoClassDefFoundError: org/apache/tez/runtime/api/Event
at org.apache.hive.jdbc.Utils.verifySuccess(Utils.java:266)
at org.apache.hive.jdbc.Utils.verifySuccessWithInfo(Utils.java:252)
at org.apache.hive.jdbc.HiveStatement.runAsyncOnServer(HiveStatement.java:309)
at org.apache.hive.jdbc.HiveStatement.execute(HiveStatement.java:250)
at org.apache.hive.jdbc.HiveStatement.executeQuery(HiveStatement.java:434)
at HiveRead.(HiveRead.java:45)
at HiveRead.main(HiveRead.java:24)
Caused by: org.apache.hive.service.cli.HiveSQLException: Error running query: java.lang.NoClassDefFoundError:
org/apache/tez/runtime/api/Event
at org.apache.hive.service.cli.operation.SQLOperation.prepare(SQLOperation.java:225)
at org.apache.hive.service.cli.operation.SQLOperation.runInternal(SQLOperation.java:276)
at org.apache.hive.service.cli.operation.Operation.run(Operation.java:324)
at org.apache.hive.service.cli.session.HiveSessionImpl.executeStatementInternal(HiveSessionImpl.java:499)
at org.apache.hive.service.cli.session.HiveSessionImpl.executeStatementAsync(HiveSessionImpl.java:486)
at org.apache.hive.service.cli.CLIService.executeStatementAsync(CLIService.java:295)
at org.apache.hive.service.cli.thrift.ThriftCLIService.ExecuteStatement(ThriftCLIService.java:506)
at org.apache.hive.service.rpc.thrift.TCLIService$Processor$ExecuteStatement.getResult(TCLIService.java:1437)
at org.apache.hive.service.rpc.thrift.TCLIService$Processor$ExecuteStatement.getResult(TCLIService.java:1422)
at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:39)
at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:39)
at org.apache.hive.service.auth.TSetIpAddressProcessor.process(TSetIpAddressProcessor.java:56)
at org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:286)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NoClassDefFoundError: org/apache/tez/runtime/api/Event
at org.apache.hadoop.hive.ql.parse.TezCompiler.runStatsDependentOptimizations(TezCompiler.java:282)
at org.apache.hadoop.hive.ql.parse.TezCompiler.optimizeOperatorPlan(TezCompiler.java:133)
at org.apache.hadoop.hive.ql.parse.TaskCompiler.compile(TaskCompiler.java:134)
at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.analyzeInternal(SemanticAnalyzer.java:10947)
at org.apache.hadoop.hive.ql.parse.CalcitePlanner.analyzeInternal(CalcitePlanner.java:246)
at org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:250)
at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:477)
at org.apache.hadoop.hive.ql.Driver.compileInternal(Driver.java:1242)
at org.apache.hadoop.hive.ql.Driver.compileAndRespond(Driver.java:1229)
at org.apache.hive.service.cli.operation.SQLOperation.prepare(SQLOperation.java:191)
... 15 more
Caused by: java.lang.ClassNotFoundException: org.apache.tez.runtime.api.Event
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 25 more
I want to use Tez for hive instead of mr. I changed hive.execution.engine to tez in hive-site.xml and run hiveserver2 .
I am using Hive Java API to run Hive queries and when I run queries using Tez, I get that error. I am using Maven to get all required jars and I have
tez jar, tez commons, 'tez runtime api`.I am also following this tutorial to configure tez
I have an Infinispan Server, version 6.0.x, the one derived from JBoss 7.2, and it is working fine for caching.
However, when I try to monitor it by JMX I can't. This is URL I type in jconsole.bat :
service:jmx:remoting-jmx://MY.IP.ADDRESS.HERE:9999
But I get this error :
Exception in thread "VMPanel.connect" java.util.ServiceConfigurationError: javax.management.remote.JMXConnectorProvider: Provider org.jboss.remotingjmx.RemotingConnectorProvider could not be instantiated: java.lang.NoClassDefFoundError: org/jboss/logging/Logger
at java.util.ServiceLoader.fail(ServiceLoader.java:224)
at java.util.ServiceLoader.access$100(ServiceLoader.java:181)
at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:377)
at java.util.ServiceLoader$1.next(ServiceLoader.java:445)
at javax.management.remote.JMXConnectorFactory.getConnectorAsService(JMXConnectorFactory.java:472)
at javax.management.remote.JMXConnectorFactory.newJMXConnector(JMXConnectorFactory.java:341)
at javax.management.remote.JMXConnectorFactory.connect(JMXConnectorFactory.java:267)
at sun.tools.jconsole.ProxyClient.tryConnect(ProxyClient.java:370)
at sun.tools.jconsole.ProxyClient.connect(ProxyClient.java:313)
at sun.tools.jconsole.VMPanel$2.run(VMPanel.java:292)
Caused by: java.lang.NoClassDefFoundError: org/jboss/logging/Logger
at org.jboss.remotingjmx.RemotingConnectorProvider.<clinit>(RemotingConnectorProvider.java:42)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at java.lang.Class.newInstance(Class.java:374)
at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:373)
... 7 more
Caused by: java.lang.ClassNotFoundException: org.jboss.logging.Logger
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
... 14 more
Exception in thread "VMPanel.connect" java.util.ServiceConfigurationError: javax.management.remote.JMXConnectorProvider: Provider org.jboss.remotingjmx.RemotingConnectorProvider could not be instantiated: java.lang.NoClassDefFoundError: Could not initialize class org.jboss.remotingjmx.RemotingConnectorProvider
at java.util.ServiceLoader.fail(ServiceLoader.java:224)
at java.util.ServiceLoader.access$100(ServiceLoader.java:181)
at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:377)
at java.util.ServiceLoader$1.next(ServiceLoader.java:445)
at javax.management.remote.JMXConnectorFactory.getConnectorAsService(JMXConnectorFactory.java:472)
at javax.management.remote.JMXConnectorFactory.newJMXConnector(JMXConnectorFactory.java:341)
at javax.management.remote.JMXConnectorFactory.connect(JMXConnectorFactory.java:267)
at sun.tools.jconsole.ProxyClient.tryConnect(ProxyClient.java:357)
at sun.tools.jconsole.ProxyClient.connect(ProxyClient.java:313)
at sun.tools.jconsole.VMPanel$2.run(VMPanel.java:292)
Caused by: java.lang.NoClassDefFoundError: Could not initialize class org.jboss.remotingjmx.RemotingConnectorProvider
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at java.lang.Class.newInstance(Class.java:374)
at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:373)
... 7 more
Maybe I should create some managed beans somewhere? How can I fix this?
Remark 1 : In the documentation they include the necearry configuration between <global></global>, but in my case the settings should respect JBoss Schema...
Remark 2 : I tried with JBoss 7.2, and it could show me graphs and so on, and by the way I used the same URL. The difference is that I used jconsole.bat of JBoss instead of Infinispan.
Please, any idea about the necessary configuration?
Thank you.
I'm a Windows 7 user, and this is the fix that worked for me.
Open jconsole.bat for editting.
At the top, turn on the echoing.
#echo on
Then go down and find this line
call :SearchForJars "%JBOSS_MODULEPATH%\system\layers\base\org\jboss\logging\main"
Insert the following line before it:
echo "%JBOSS_MODULEPATH%\system\layers\base\org\jboss\logging\main"
I'm not sure why that worked, but it did. If you get different ClassNotFound exceptions, try echo statements above the other jar searches.
When I tried to build my first hibernate application the following error occurs NoClassDefFoundError
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/lucene/analysis/standard/StandardAnalyzer
at org.hibernate.search.impl.ConfigContext.initAnalyzer(ConfigContext.java:168)
at org.hibernate.search.impl.ConfigContext.<init>(ConfigContext.java:104)
at org.hibernate.search.spi.SearchFactoryBuilder.initDocumentBuilders(SearchFactoryBuilder.java:312)
at org.hibernate.search.spi.SearchFactoryBuilder.buildNewSearchFactory(SearchFactoryBuilder.java:218)
at org.hibernate.search.spi.SearchFactoryBuilder.buildSearchFactory(SearchFactoryBuilder.java:143)
at org.hibernate.search.hcore.impl.HibernateSearchSessionFactoryObserver.sessionFactoryCreated(HibernateSearchSessionFactoryObserver.java:74)
at org.hibernate.internal.SessionFactoryObserverChain.sessionFactoryCreated(SessionFactoryObserverChain.java:52)
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:587)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1857)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1928)
at com.TestHibrnt.main(TestHibrnt.java:16)
Caused by: java.lang.ClassNotFoundException: org.apache.lucene.analysis.standard.StandardAnalyzer
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
... 11 more
Required jar containing org/apache/lucene/analysis/standard/StandardAnalyzer is missing so you have to download jar(lucene-1.2.jar) and then set your classpath
I had the same problem today. When I check the error, I found org.hibernate.search on several lines, even though I'm just using the Hibernate ORM. Then I removed the build path of Hibernate Search and no more error. Check if you have the same path and if you don't need it, just remove it.
I'm implementing Dbutils using net.sourceforge.jtds.jdbc.Driver driver in jtds package.
Problem is it gives me java.sql.SQLException: net.sourceforge.jtds.jdbc.Driver error even after including jtds jar in project. It works fine when i include this jtds jar file in lib folder of tomcat.
I checked build code, jtds jar file is present there.
java.sql.SQLException: net.sourceforge.jtds.jdbc.Driver
at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:254)
at org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:182)
at org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:702)
at org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:634)
at org.apache.tomcat.jdbc.pool.ConnectionPool.init(ConnectionPool.java:488)
at org.apache.tomcat.jdbc.pool.ConnectionPool.<init>(ConnectionPool.java:144)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.pCreatePool(DataSourceProxy.java:116)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.createPool(DataSourceProxy.java:103)
at com.cibil.crs.escalationmatrix.dbutil.DataSourceFactory.createDataSource(DataSourceFactory.java:46)
at com.cibil.crs.escalationmatrix.dbutil.DataSourceFactory.createDataSource(DataSourceFactory.java:17)
at org.apache.tomcat.jdbc.pool.DataSourceFactory.getObjectInstance(DataSourceFactory.java:237)
at org.apache.naming.factory.ResourceFactory.getObjectInstance(ResourceFactory.java:143)
at javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:321)
at org.apache.naming.NamingContext.lookup(NamingContext.java:843)
at org.apache.naming.NamingContext.lookup(NamingContext.java:154)
at org.apache.naming.NamingContext.lookup(NamingContext.java:831)
at org.apache.naming.NamingContext.lookup(NamingContext.java:168)
at org.apache.catalina.core.NamingContextListener.addResource(NamingContextListener.java:1093)
at org.apache.catalina.core.NamingContextListener.createNamingContext(NamingContextListener.java:672)
at org.apache.catalina.core.NamingContextListener.lifecycleEvent(NamingContextListener.java:271)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5173)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:657)
at org.apache.catalina.startup.HostConfig$DeployDescriptor.run(HostConfig.java:1637)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
Caused by: java.lang.ClassNotFoundException: net.sourceforge.jtds.jdbc.Driver
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:270)
at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:246)
Any idea?
You are using a connection pool and you are making use of the tomcat. See the link below, and notice the line that says "The fully qualified Java class name of the JDBC driver to be used. The driver has to be accessible from the same classloader as tomcat-jdbc.jar".
https://people.apache.org/~fhanik/jdbc-pool/jdbc-pool.html
I've got a word count example class called by a Jetty server's handle method. The job is submitted with:
JobClient.runJob(conf);
Sadly, the JobTracker sees nothing, the job does not get submitted, but it finishes and creates output. I've found out, that I have to inject my configurations with:
conf.addResource(new Path("/usr/local/hadoop/conf/mapred-site.xml"));
After adding this line, the JobTracker gets the job, but it fails with the following exception:
INFO: Task Id : attempt_201312071601_0005_m_000000_1, Status : FAILED
java.lang.RuntimeException: java.lang.RuntimeException: java.lang.ClassNotFoundException: WC2$Reduce
at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:889)
at org.apache.hadoop.mapred.JobConf.getCombinerClass(JobConf.java:1049)
at org.apache.hadoop.mapred.Task$CombinerRunner.create(Task.java:1385)
at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.<init>(MapTask.java:986)
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:422)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:366)
at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1190)
at org.apache.hadoop.mapred.Child.main(Child.java:249)
Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: WC2$Reduce
at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:857)
at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:881)
... 10 more
Caused by: java.lang.ClassNotFoundException: WC2$Reduce
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:270)
at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:810)
at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:855)
... 11 more
My combiner class is the same as the reducer class. I've downloaded the Hadoop WordCount example without modifications. Only the mentioned addResource.