Can anyone please tell me the reason for the below exception while loading data in orientDB?
2018-12-28 10:46:54.652 ERROR 14136 --- [nio-8088-exec-3] org.camunda.bpm.engine.context : ENGINE-16004 Exception while closing command context: Could not initialize class com.orientechnologies.orient.core.db.OPartitionedDatabasePool$DatabaseDocumentTxPooled
java.lang.NoClassDefFoundError: Could not initialize class com.orientechnologies.orient.core.db.OPartitionedDatabasePool$DatabaseDocumentTxPooled
at com.orientechnologies.orient.core.db.OPartitionedDatabasePool.initQueue(OPartitionedDatabasePool.java:350) ~[orientdb-core-3.0.10.jar:3.0.10]
at com.orientechnologies.orient.core.db.OPartitionedDatabasePool.<init>(OPartitionedDatabasePool.java:117) ~[orientdb-core-3.0.10.jar:3.0.10]
at com.tinkerpop.blueprints.impls.orient.OrientGraphFactory.<init>(OrientGraphFactory.java:176) ~[orientdb-graphdb-3.0.10.jar:3.0.10]
at com.tinkerpop.blueprints.impls.orient.OrientGraphFactory.<init>(OrientGraphFactory.java:157) ~[orientdb-graphdb-3.0.10.jar:3.0.10]
at aix.serviceImpl.VmaxInsertion.VMaxlogDataInsertion(VmaxInsertion.java:253) ~[classes/:na]
at aix.serviceImpl.DataInsertion.execute(DataInsertion.java:61) ~[classes/:na]
at org.camunda.bpm.engine.impl.bpmn.delegate.JavaDelegateInvocation.invoke(JavaDelegateInvocation.java:36) ~[camunda-engine-7.9.0.jar:7.9.0]
at org.camunda.bpm.engine.impl.delegate.DelegateInvocation.proceed(DelegateInvocation.java:54) ~[camunda-engine-7.9.0.jar:7.9.0]
at org.camunda.bpm.engine.impl.delegate.DefaultDelegateInterceptor.handleInvocationInContext(DefaultDelegateInterceptor.java:87) ~[camunda-engine-7.9.0.jar:7.9.0]
at org.camunda.bpm.engine.impl.delegate.DefaultDelegateInterceptor.handleInvocation(DefaultDelegateInterceptor.java:59) ~[camunda-engine-7.9.0.jar:7.9.0]
at org.camunda.bpm.engine.impl.bpmn.behavior.ServiceTaskJavaDelegateActivityBehavior.execute(ServiceTaskJavaDelegateActivityBehavior.java:50) ~[camunda-engine-7.9.0.jar:7.9.0]