exception

javax.servlet.ServletException: Servlet.init() for servlet modjy threw exception
				org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
				org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
				org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
				org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
				org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070)
				org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
				org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
				java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
				java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
				org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
				java.lang.Thread.run(Thread.java:744)

root cause

java.lang.NoClassDefFoundError: org/python/core/PyRunnable
				java.lang.ClassLoader.defineClass1(Native Method)
				java.lang.ClassLoader.defineClass(ClassLoader.java:800)
				org.python.core.BytecodeLoader$Loader.loadClassFromBytes(BytecodeLoader.java:119)
				org.python.core.BytecodeLoader.makeClass(BytecodeLoader.java:37)
				org.python.core.BytecodeLoader.makeCode(BytecodeLoader.java:67)
				org.python.core.imp.createFromSource(imp.java:353)
				org.python.core.imp.loadFromSource(imp.java:578)
				org.python.core.imp.find_module(imp.java:478)
				org.python.core.imp.import_next(imp.java:718)
				org.python.core.imp.import_first(imp.java:739)
				org.python.core.imp.load(imp.java:631)
				com.xhaus.modjy.ModjyJServlet.checkSitePackages(ModjyJServlet.java:181)
				com.xhaus.modjy.ModjyJServlet.setupEnvironment(ModjyJServlet.java:166)
				com.xhaus.modjy.ModjyJServlet.init(ModjyJServlet.java:109)
				javax.servlet.GenericServlet.init(GenericServlet.java:158)
				org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
				org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
				org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
				org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
				org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070)
				org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
				org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
				java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
				java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
				org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
				java.lang.Thread.run(Thread.java:744)

root cause

java.lang.ClassNotFoundException: org.python.core.PyRunnable
				  org.python.core.BytecodeLoader$Loader.loadClass(BytecodeLoader.java:103)
				  java.lang.ClassLoader.loadClass(ClassLoader.java:358)
				  java.lang.ClassLoader.defineClass1(Native Method)
				  java.lang.ClassLoader.defineClass(ClassLoader.java:800)
				  org.python.core.BytecodeLoader$Loader.loadClassFromBytes(BytecodeLoader.java:119)
				  org.python.core.BytecodeLoader.makeClass(BytecodeLoader.java:37)
				  org.python.core.BytecodeLoader.makeCode(BytecodeLoader.java:67)
				  org.python.core.imp.createFromSource(imp.java:353)
				  org.python.core.imp.loadFromSource(imp.java:578)
				  org.python.core.imp.find_module(imp.java:478)
				  org.python.core.imp.import_next(imp.java:718)
				  org.python.core.imp.import_first(imp.java:739)
				  org.python.core.imp.load(imp.java:631)
				  com.xhaus.modjy.ModjyJServlet.checkSitePackages(ModjyJServlet.java:181)
				  com.xhaus.modjy.ModjyJServlet.setupEnvironment(ModjyJServlet.java:166)
				  com.xhaus.modjy.ModjyJServlet.init(ModjyJServlet.java:109)
				  javax.servlet.GenericServlet.init(GenericServlet.java:158)
				  org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
				  org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
				  org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
				  org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
				  org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070)
				  org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
				  org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
				  java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
				  java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
				  org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
				  java.lang.Thread.run(Thread.java:744)