Develop Reference

How do I troubleshoot the installation of Apache Accumulo on Linux?

I am trying to install open source Accumulo on RHEL 7.x. I have two GB of swap space. I have installed Java 1.8, Hadoop 3, and Zookeeper. I have run the bootstrap_config.sh script for Accumulo 1.9.2.
I ran this (and expected it to work):
/bin/accumulo-1.9.2/bin/accumulo init
But I get this error:
[start.Main] ERROR: Uncaught exception
java.util.ServiceConfigurationError:
org.apache.accumulo.start.spi.KeywordExecutable: Provider
org.apache.accumulo.proxy.Proxy could not be instantiated
at java.util.ServiceLoader.fail(ServiceLoader.java:232)
at java.util.ServiceLoader.access$100(ServiceLoader.java:185)
at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:384)
at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:404)
at java.util.ServiceLoader$1.next(ServiceLoader.java:480)
at org.apache.accumulo.start.Main.checkDuplicates(Main.java:237)
at org.apache.accumulo.start.Main.getExecutables(Main.java:228)
at org.apache.accumulo.start.Main.main(Main.java:84) Caused by: java.lang.NoClassDefFoundError:
org/apache/commons/configuration/Configuration
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2671)
at java.lang.Class.getConstructor0(Class.java:3075)
at java.lang.Class.newInstance(Class.java:412)
at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:380)
... 5 more Caused by: java.lang.ClassNotFoundException: org.apache.commons.configuration.Configuration
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at org.apache.accumulo.start.classloader.AccumuloClassLoader$2.loadClass(AccumuloClassLoader.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 10 more
I used the Accumulo bootstrap_config.sh script to configure Hadoop version 3. How do I get "/bin/accumulo-1.9.2/bin/accumulo init" to work?

Accumulo 1.9.2 expects Hadoop 2 out of the box, but does have a build profile to rebuild a tarball specifically for use with Hadoop 3. You can build Accumulo with the Hadoop 3 profile by downloading the source tarball and doing:
mvn clean package -Dhadoop.profile=3 -DskipTests
If you're not interested in rebuilding from source, it may be possible to simply fix the class path issues by reading the error message, and adjusting your class path accordingly. In this case, it seems you're missing a commons-configuration jar.

Error occurred during initialization of VM from a remote debian VM

I know my question is related to some others, but the answers I found don't work for me. That's my problem: I have to run a JAVA script on a remote debian VM (from bash). When I run the program I get this:
Error occurred during initialization of VM
java.lang.Error: java.lang.ClassNotFoundException: org.processmining.framework.util.ProMClassLoader
at java.lang.ClassLoader.initSystemClassLoader(ClassLoader.java:1469)
at java.lang.ClassLoader.getSystemClassLoader(ClassLoader.java:1436)
Caused by: java.lang.ClassNotFoundException: org.processmining.framework.util.ProMClassLoader
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:348)
at java.lang.SystemClassLoaderAction.run(ClassLoader.java:2209)
at java.lang.SystemClassLoaderAction.run(ClassLoader.java:2195)
at java.security.AccessController.doPrivileged(Native Method)
at java.lang.ClassLoader.initSystemClassLoader(ClassLoader.java:1456)
at java.lang.ClassLoader.getSystemClassLoader(ClassLoader.java:1436)
As seen on stackoverflow, I already tried different display options, like
export DISPLAY=:0.0
setenv DISPLAY :0.0
unset DISPLAY
and some others, but unsuccessfully.
I suspect a GUI problem on my debian VM. An idea ?

Exception in thread "main" java.lang.NoClassDefFoundError: org/dom4j/io/SAXReader in Hibernate application development

I am using UBUNTU 16.04 LTS to develope hibernate with java simple program, In that, I load the below mentioned dom4j-1.6.jar file from local directory not from root path,
If I need to load the dom4j-1.6.jar file from root in which directory should have?
the below mentioned error raising after loading configuration file
Kindly provide solution to proceed further
Exception in thread "main" java.lang.NoClassDefFoundError: org/dom4j/io/SAXReader
at org.hibernate.util.XMLHelper.createSAXReader(XMLHelper.java:35)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1218)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1162)
at com.hibernate.app.Pupil.main(Pupil.java:17)
Caused by: java.lang.ClassNotFoundException: org.dom4j.io.SAXReader
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 4 more
My Advance Thanks to ALL

Add dom4j.jar to your classpath. Downnload

oracle.jdbc.driver.OracleDriver exception for Beginners Java

I searched a lot about this error but no solution works.
I'm just learning Java connection with Oracle.
But I'm getting this exception.
oracle.jdbc.driver.OracleDriver
I already placed ojdbc6.jar in C:\Program Files\Java\jre1.8.0_60\lib\ext now what to do next?
In few days ago I was working fine with database. But recently 2 days ago I reinstall windows not forgot how to setup it.
Here is Complete StackTrace.
java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at RunQuery.main(RunQuery.java:11)

Please check this Setting multiple jars in java classpath link for adding third party jar (ojdbc6.jar) while running Java program.
and I suggest you to use latest driver jar which is compatible to JDK 8, You can check on this FAQ link http://www.oracle.com/technetwork/database/enterprise-edition/jdbc-faq-090281.html#01_02

Error running spoon on Ubuntu 14.04 64 bit

I am using Spoon tool of Pentaho data integration for long and it was working fine on my system. But since i moved it to /opt I am unable to run again . I have Oracle Java 8 installed on my system and each time try to run it i am end up with following exception
Exception in thread "main" java.lang.NoClassDefFoundError: org/eclipse/swt/widgets/Composite
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2688)
at java.lang.Class.getMethod0(Class.java:2937)
at java.lang.Class.getMethod(Class.java:1771)
at org.pentaho.commons.launcher.Launcher.main(Launcher.java:149)
Caused by: java.lang.ClassNotFoundException: org.eclipse.swt.widgets.Composite
at java.net.URLClassLoader$1.run(URLClassLoader.java:372)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 5 more
please help me to resolve this error i haven't found any solution yet

I found a solution to this problem I have removed all hidden directories generated by Kettle as well as its copy from /opt . Then I have extracted new version copy . after that I have added /opt/data-integration to my path variable and I have tried to run it from my home . Although it was not a successful run but it has generated all those dependent hidden folders required to run it . then I have to go to that directory by issuing
cd /opt/data-integration
and then I was successful to run it by issuing
sh spoon.sh
I have to go to that directory because Pentaho developers has set it so by placing relative path to launcher folder in their main command at spoon.sh.