"Error stacktraces" is output from maven. mvn -e option turns on Error reporting.
From: aaron morton <aa...@thelastpickle.com<mailto:aa...@thelastpickle.com>> Reply-To: "user@cassandra.apache.org<mailto:user@cassandra.apache.org>" <user@cassandra.apache.org<mailto:user@cassandra.apache.org>> Date: Wed, 24 Aug 2011 02:14:12 -0700 To: "user@cassandra.apache.org<mailto:user@cassandra.apache.org>" <user@cassandra.apache.org<mailto:user@cassandra.apache.org>> Subject: Re: run Cassandra tutorial example HColumn(city=Austin) Is the data you are after. Have a look in src/main/resources/log4j.properties if you want to change the logging settings. Have fun. ----------------- Aaron Morton Freelance Cassandra Developer @aaronmorton http://www.thelastpickle.com On 24/08/2011, at 4:06 AM, Alvin UW wrote: Thanks. By your solution, the problem is fixed. But my output is like this. I don't understand what's the meaning of " Error stacktraces are turned on." And I hope only the results are outputted, not the INFO. mvn -e exec:java -Dexec.args="get" -Dexec.mainClass="com.datastax.tutorial.TutorialRunner" + Error stacktraces are turned on. [INFO] Scanning for projects... [INFO] ------------------------------------------------------------------------ [INFO] Building cassandra-tutorial [INFO] task-segment: [exec:java] [INFO] ------------------------------------------------------------------------ [INFO] Preparing exec:java [INFO] No goals needed for project - skipping [INFO] [exec:java {execution: default-cli}] HColumn(city=Austin) [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESSFUL [INFO] ------------------------------------------------------------------------ [INFO] Total time: 1 second [INFO] Finished at: Tue Aug 23 12:02:27 EDT 2011 [INFO] Final Memory: 11M/100M 2011/8/23 aaron morton <aa...@thelastpickle.com<mailto:aa...@thelastpickle.com>> Did you sort this out ? The #cassandra IRC room is a good place to get help as well. I tried to build it first using mvn compile and got this different error "[ERROR] Failed to execute goal on project cassandra-tutorial: Could not resolve dependencies for project com.datastax.tutorial:cassandra-tutorial:jar:1.0-SNAPSHOT: Could not find artifact me.prettyprint:hector-core:jar:0.8.0-2-SNAPSHOT -> [Help 1]" There is a fix here... https://github.com/zznate/cassandra-tutorial/pull/1 After than I did mvn compile and it worked. So added the schema… path-to-cassandra/bin/cassandra-cli --host localhost < ~/code/github/datastax/cassandra-tutorial/npanxx_script.txt And ran mvn -e exec:java -Dexec.args="get" -Dexec.mainClass="com.datastax.tutorial.TutorialRunner" Which outputted HColumn(city=Austin) Hope that helps. ----------------- Aaron Morton Freelance Cassandra Developer @aaronmorton http://www.thelastpickle.com<http://www.thelastpickle.com/> On 23/08/2011, at 10:30 AM, Alvin UW wrote: Hello, I'd like to try the cassandra tutorial example: https://github.com/zznate/cassandra-tutorial by following the readme. After typing mvn -e exec:java -Dexec.args="get" -Dexec.mainClass="com.datastax.tutorial.TutorialRunner" I got the following errors. Should I do something before the above command? Thanks. + Error stacktraces are turned on. [INFO] Scanning for projects... [INFO] ------------------------------------------------------------------------ [INFO] Building cassandra-tutorial [INFO] task-segment: [exec:java] [INFO] ------------------------------------------------------------------------ [INFO] Preparing exec:java [INFO] No goals needed for project - skipping [INFO] [exec:java {execution: default-cli}] [INFO] ------------------------------------------------------------------------ [ERROR] BUILD ERROR [INFO] ------------------------------------------------------------------------ [INFO] An exception occured while executing the Java class. com.datastax.tutorial.TutorialRunner [INFO] ------------------------------------------------------------------------ [INFO] Trace org.apache.maven.lifecycle.LifecycleExecutionException: An exception occured while executing the Java class. com.datastax.tutorial.TutorialRunner at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:719) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:569) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:539) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328) at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138) at org.apache.maven.cli.MavenCli.main(MavenCli.java:362) at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315) at org.codehaus.classworlds.Launcher.launch(Launcher.java:255) at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430) at org.codehaus.classworlds.Launcher.main(Launcher.java:375) Caused by: org.apache.maven.plugin.MojoExecutionException: An exception occured while executing the Java class. com.datastax.tutorial.TutorialRunner at org.codehaus.mojo.exec.ExecJavaMojo.execute(ExecJavaMojo.java:346) at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:490) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694) ... 17 more Caused by: java.lang.ClassNotFoundException: com.datastax.tutorial.TutorialRunner at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at java.lang.ClassLoader.loadClass(ClassLoader.java:248) at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:284) at java.lang.Thread.run(Thread.java:619) [INFO] ------------------------------------------------------------------------ [INFO] Total time: < 1 second [INFO] Finished at: Mon Aug 22 18:24:05 EDT 2011 [INFO] Final Memory: 7M/100M
