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In Prod env Java batch Fails sometimes with NoClassdeffoundError due to class not found exception. Occurres atleast once in a day or a week

I am facing NoClassdeffoundError due to class not found exception for Java batch application.jar files are deployed on the windows server these batch jars are getting executed via bat file from Tivoli job schedular .But I am totally clueless why it is occurring only some times in a day or in week.This issue is not coming on QA Environment but on production it occurring.My logs are as follows
java.io.IOException: An unexpected network error occurred
at java.io.FileOutputStream.writeBytes(Native Method)
at java.io.FileOutputStream.write(Unknown Source)
at org.apache.logging.log4j.core.appender.OutputStreamManager.writeToDestination(OutputStreamManager.java:256)
... 29 more
java.lang.NoClassDefFoundError: org/apache/commons/lang3/exception/ExceptionUtils
at com.xxx.yy.batch.BatchExecutor.processFiles(BatchExecutor.java:322)
at com.xxx.yy.batch.BatchExecutor.processZipFiles(BatchExecutor.java:235)
at com.xxx.yy.batch.BatchExecutor.readFilesAndUpdateTables(BatchExecutor.java:204)
at com.xxx.yy.batch.BatchExecutor.executeBatch(BatchExecutor.java:85)
at com.xxx.yy.batch.BatchExecutor.main(BatchExecutor.java:65)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.lang3.exception.ExceptionUtils
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 5 more
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/io/Java7Support
at org.apache.commons.io.FileUtils.isSymlink(FileUtils.java:3089)
at org.apache.commons.io.FileUtils.deleteDirectory(FileUtils.java:1574)
at com.xxx.yy.batch.processor.BatchProcessor.cleanFiles(BatchProcessor.java:426)
at com.xxx.yy.batch.BatchExecutor.executeBatch(BatchExecutor.java:147)
at com.xxx.yy.batch.BatchExecutor.main(BatchExecutor.java:65)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.io.Java7Support
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 5 more
I confirmed that my class path is correct all the jars and classes are present.

Exception in thread "main" dropbox application

I'm trying to make a simple application with Java, using Eclipse that could upload a file from my computer to Dropbox but whenever I compile, I get this error:
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/http/conn/params/ConnPerRoute
at javaaplication1.JavaApplication11.main(JavaApplication11.java:32)
Caused by: java.lang.ClassNotFoundException: org.apache.http.conn.params.ConnPerRoute
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 1 more
Can you help me figure this out?
Thank you in advance.

You miss the httpclient.jar in your classpath. Download it and add it to your classpath.

eclipse errors while running custom code

While adding custom jar files in the project and executing some java code I am getting this error any idea how to solve this .There is no error in code ,it was running smoothly before this happen.
Exception in thread "main" java.lang.NoClassDefFoundError: org/aspectj/lang/Signature
at com.util.DfExSession.connectToDocbase(DfExSession.java:18)## Heading ##
at com.console.TestConsole.main(TestConsole.java:17)
Caused by: java.lang.ClassNotFoundException: org.aspectj.lang.Signature
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 2 more

Look's like the aspectjrt.jar is missing in your classptah. Download & add it to your classpath.

error in running java file

I am making a webapp using tomcat but its having problems in running in windows...there is a java file(thread.java) which runs another java file(emaildownload.java) so first I need to get to the directory in which class file is stored ...I am using
this.getClass().getClassLoader().getResource("").getPath();
for getting class path...and then I am running file by:
thread foo=new thread();
foo.runProcess("java mainclasses.emaildownload "+credentials[0]+" "+credentials[1]+" "+credentials[2]+" "+credentials[3]+" ");
file structure:
C:\Program Files\Apache Software Foundation\Tomcat 8.0\webapps\Mazil3.0\WEB-INF\classes\mainclasses\emaildownload.class
and mainclasses is package...
but I am getting this error:
java.lang.NoClassDefFoundError: javax/mail/UIDFolder
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
at java.lang.Class.getMethod0(Unknown Source)
at java.lang.Class.getMethod(Unknown Source)
at sun.launcher.LauncherHelper.validateMainClass(Unknown Source)
at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)
Caused by: java.lang.ClassNotFoundException: javax.mail.UIDFolder
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 6 more
I don't understand why the error is coming?

Interface UIDFolder belongs to javax.mail package since it is saying NoClassDefFoundError so you might not be having the javamail api in your classpath .Get it from here

Exception in thread "main" java.lang.NoClassDefFoundError: org/tmatesoft/sqljet/core/SqlJetException

I was trying to get the SVN project to my local directory. But I am getting Exception.
Exception in thread "main" java.lang.NoClassDefFoundError: org/tmatesoft/sqljet/core/SqlJetException
at org.tmatesoft.svn.core.internal.wc17.SVNWCContext.<init>(SVNWCContext.java:278)
at org.tmatesoft.svn.core.internal.wc17.SVNWCContext.<init>(SVNWCContext.java:274)
at org.tmatesoft.svn.core.wc2.SvnOperationFactory.obtainWcContext(SvnOperationFactory.java:1269)
at org.tmatesoft.svn.core.wc2.SvnOperationFactory.run(SvnOperationFactory.java:1232)
at org.tmatesoft.svn.core.wc2.SvnOperation.run(SvnOperation.java:291)
at down.main(down.java:20)
Caused by: java.lang.ClassNotFoundException: org.tmatesoft.sqljet.core.SqlJetException
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 6 more
Thank you

Required jar(sqljet.jar) is not their in your classpath
you can download jar from this link and then set your classpath.