Druid Tutorial - No Such File Or Directory

[Chadin Anuwattanaporn]

Hi all!

I'm trying to follow the tutorial here (http://druid.io/docs/0.6.52/Tutorial:-A-First-Look-at-Druid.html) and I downloaded and extracted the files just fine. When I ran "run_example_server.sh" and tried to run the Wikipedia example, however, I got the following: 

This will run a stand-alone version of Druid

Please specify an example type.

Examples availables:

rabbitmq rand twitter webstream wikipedia

> wikipedia

ls: cannot access /home/ubuntu/druid-services-0.6.52/../target/druid-examples-*-selfcontained.jar: No such file or directory

ls: cannot access /home/ubuntu/druid-services-0.6.52/../../services/target/druid-services-*-selfcontained.jar: No such file or directory

Running command:

+ java -Xmx256m -Duser.timezone=UTC -Dfile.encoding=UTF-8 -Ddruid.realtime.specFile=/home/ubuntu/druid-services-0.6.52/examples/wikipedia/wikipedia_realtime.spec -classpath '/home/ubuntu/druid-services-0.6.52/examples/wikipedia:::/home/ubuntu/druid-services-0.6.52/../config/realtime:/home/ubuntu/druid-services-0.6.52/lib/*:/home/ubuntu/druid-services-0.6.52/config/realtime' io.druid.cli.Main example realtime

Exception in thread "main" java.lang.UnsupportedClassVersionError: io/druid/cli/Main : Unsupported major.minor version 51.0

        at java.lang.ClassLoader.defineClass1(Native Method)

        at java.lang.ClassLoader.defineClass(ClassLoader.java:643)

        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)

        at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)

        at java.net.URLClassLoader.access$000(URLClassLoader.java:73)

        at java.net.URLClassLoader$1.run(URLClassLoader.java:212)

        at java.security.AccessController.doPrivileged(Native Method)

        at java.net.URLClassLoader.findClass(URLClassLoader.java:205)

        at java.lang.ClassLoader.loadClass(ClassLoader.java:323)

        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)

        at java.lang.ClassLoader.loadClass(ClassLoader.java:268)

Could not find the main class: io.druid.cli.Main. Program will exit.

I did a search for the two files highlighted, but I couldn't find it.

Did I miss anything?

Thanks!

[Carlos]

+1. Similar issue here.

carlos@ubuntu:~/Desktop/druid-services-0.6.52$ sudo ./run_example_server.sh 

This will run a stand-alone version of Druid

Please specify an example type.

Examples availables:

rabbitmq rand twitter webstream wikipedia

> wikipedia

 

ls: cannot access /home/carlos/Desktop/druid-services-0.6.52/../target/druid-examples-*-selfcontained.jar: No such file or directory

ls: cannot access /home/carlos/Desktop/druid-services-0.6.52/../../services/target/druid-services-*-selfcontained.jar: No such file or directory

Running command:

+ java -Xmx256m -Duser.timezone=UTC -Dfile.encoding=UTF-8 -Ddruid.realtime.specFile=/home/carlos/Desktop/druid-services-0.6.52/examples/wikipedia/wikipedia_realtime.spec -classpath '/home/carlos/Desktop/druid-services-0.6.52/examples/wikipedia:::/home/carlos/Desktop/druid-services-0.6.52/../config/realtime:/home/carlos/Desktop/druid-services-0.6.52/lib/*:/home/carlos/Desktop/druid-services-0.6.52/config/realtime' io.druid.cli.Main example realtime

2014-02-03 18:04:01,762 INFO [main] io.druid.server.initialization.PropertiesModule - Loading properties from runtime.properties

2014-02-03 18:04:01,802 INFO [main] org.hibernate.validator.internal.util.Version - HV000001: Hibernate Validator 5.0.1.Final

2014-02-03 18:04:02,406 INFO [main] io.druid.guice.JsonConfigurator - Loaded class[class io.druid.server.initialization.ExtensionsConfig] from props[druid.extensions.] as [ExtensionsConfig{searchCurrentClassloader=true, coordinates=[io.druid.extensions:druid-examples:0.6.52, io.druid.extensions:druid-kafka-seven:0.6.52, io.druid.extensions:druid-rabbitmq:0.6.52], localRepository='/root/.m2/repository', remoteRepositories=[http://repo1.maven.org/maven2/, https://metamx.artifactoryonline.com/metamx/pub-libs-releases-local]}]

2014-02-03 18:04:02,567 INFO [main] io.druid.initialization.Initialization - Loading extension[io.druid.extensions:druid-examples:0.6.52] for class[io.druid.cli.CliCommandCreator]

[Fangjin Yang]

Hi Chadin,

That message is actually quite misleading. There are a set of files that are added to the classpath before Druid is run. We used to build a self contained jar with Druid that no longer exists. The script should really be updated.

The actual problem is this message:

Unsupported major.minor version 51.0

What this message means is that a higher JDK version was used at compile time than at run time. Druid 0.6.x requires Java 7. You will need to update your JDK to 1.7

Carlos:

Your run actually seems correct. The first time you run Druid examples, it needs a few minutes to download some dependency packages. 

If you notice this message:

2014-02-03 18:04:02,567 INFO [main] io.druid.initialization.Initialization - Loading extension[io.druid.extensions:druid-examples:0.6.52] for class[io.druid.cli.CliCommandCreator]

It means Druid is downloading extension packages. These should complete in a few minutes and the example should run.

Hope that helps guys.

Thanks,

FJ

[Carlos]

Perfect! Thanks FJ

[Chadin Anuwattanaporn]

Hi FJ, 

Worked awesome! Thank you!

[Manh Tran]

Hi FJ,

I also have problem with version druid 0.6.77. I run with stand-alone mode with JDK is 1.7.0_07. After I run script and choise example is wikipedia then throw exception as below:

[root@offica1 druid-services-0.6.77]# ./run_example_server.sh

This will run a stand-alone version of Druid

Please specify an example type.

Examples availables:

rabbitmq rand twitter webstream wikipedia

> wikipedia

Running command:

+ java -Xmx256m -Duser.timezone=UTC -Dfile.encoding=UTF-8 -Ddruid.realtime.specFile=/opt/druid-services-0.6.77/examples/wikipedia/wikipedia_realtime.spec -classpath '/opt/druid-services-0.6.77/examples/wikipedia:/opt/druid-services-0.6.77/../config/realtime:/opt/druid-services-0.6.77/lib/*:/opt/druid-services-0.6.77/config/realtime' io.druid.cli.Main example realtime

Exception in thread "main" java.lang.UnsupportedClassVersionError: io/druid/cli/Main : Unsupported major.minor version 51.0

        at java.lang.ClassLoader.defineClass1(Native Method)

        at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)

        at java.lang.ClassLoader.defineClass(ClassLoader.java:615)

        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)

        at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)

        at java.net.URLClassLoader.access$000(URLClassLoader.java:58)

        at java.net.URLClassLoader$1.run(URLClassLoader.java:197)

        at java.security.AccessController.doPrivileged(Native Method)

        at java.net.URLClassLoader.findClass(URLClassLoader.java:190)

        at java.lang.ClassLoader.loadClass(ClassLoader.java:306)

        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)

        at java.lang.ClassLoader.loadClass(ClassLoader.java:247)

Could not find the main class: io.druid.cli.Main.  Program will exit.

[root@offica1 druid-services-0.6.77]#

Could you please give me an advice on this case?

Many thanks,

MT

[Frank Ren]

http://druid.io/docs/0.6.77/ now gives this:

Whoops! We couldn't find that page…

--

Frank

[Fangjin Yang]

MT: What this message means is that a higher JDK version was used at compile time than at run time. Druid 0.6.x requires Java 7. You will need to update your JDK to 1.7

Frank: Should be fixed now. Thanks.

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[Manh Tran]

Many thanks FJ