Oracle SOA BPM : Task definition not found using namespace error

If you get  the below error

Task definition not found using namespace.[[
There is no active SCA composite with the referenced task definition. The provided task definition namespace is default/xyz!9.40/userTaskHT.
Verify that the composite containing the task definition is active.
 ORABPEL-30069

Task definition not found using namespace.
There is no active SCA composite with the referenced task definition. The provided task definition namespace is default/xyz!9.40/userTaskHT.
Verify that the composite containing the task definition is active.

at oracle.bpel.services.workflow.task.impl.WorkflowUtil.getTaskDefinitionId(WorkflowUtil.java:5038)
at oracle.bpel.services.workflow.task.impl.WorkflowUtil.setTaskDefinitionIdentifiers(WorkflowUtil.java:4943)
at oracle.bpel.services.workflow.task.impl.TaskService.initiateTask(TaskService.java:1286)
at oracle.bpel.services.workflow.task.impl.TaskService.initiateTask(TaskService.java:751)
at oracle.bpel.services.workflow.task.impl.TaskService.initiateTask(TaskService.java:679)
at sun.reflect.GeneratedMethodAccessor42858.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:307)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)

Solution : Redeployment with the same revision resolved the issue.

Also refer to one of the post i found recently on invalid task definition : here