Instances Remain Locked For Hours Past The Activity Timeout interval (Doc ID 1166213.1)

Symptoms

The following error is thrown and the instance remains locked for hours

You are currently executing another operation for instance '/CustomFulfillment#Default-1.4/1412235/33'. You cannot execute more than one operation at a time for an instance.
fuego.papi.exception.CannotLockInstanceException: You are currently executing another operation for instance '/CustomFulfillment#Default-1.4/1412235/33'. You cannot execute more than one operation at a time for an instance.
at fuego.server.ProcInstOwner.createLockException(ProcInstOwner.java:119)
at fuego.server.AbstractInstanceService.getLocked(AbstractInstanceService.java:148)
at fuego.server.execution.EngineExecutionContext.acquireCurrentInstance(EngineExecutionContext.java:1694)
at fuego.server.execution.EngineExecutionContext.preImmediateExecution(EngineExecutionContext.java:1510)
at fuego.server.execution.DefaultEngineExecution$AtomicExecutionTA.runTransaction(DefaultEngineExecution.java:295)
at fuego.transaction.TransactionAction.startBaseTransaction(TransactionAction.java:470)
at fuego.transaction.TransactionAction.startTransaction(TransactionAction.java:551)
at fuego.transaction.TransactionAction.start(TransactionAction.java:212)
at fuego.server.execution.DefaultEngineExecution.executeImmediate(DefaultEngineExecution.java:123)
at fuego.server.execution.EngineExecution.executeImmediate(EngineExecution.java:66)
at fuego.server.AbstractProcessBean.runTask(AbstractProcessBean.java:3208)
at sun.reflect.GeneratedMethodAccessor106.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at fuego.lang.JavaClass.invokeMethod(JavaClass.java:1410)
at fuego.lang.JavaObject.invoke(JavaObject.java:227)
at fuego.component.Message.process(Message.java:585)
at fuego.component.ExecutionThread.processMessage(ExecutionThread.java:780)
at fuego.component.ExecutionThread.processBatch(ExecutionThread.java:755)
at fuego.component.ExecutionThread.doProcessBatch(ExecutionThread.java:142)
at fuego.component.ExecutionThread.doProcessBatch(ExecutionThread.java:134)
at fuego.fengine.FEngineProcessBean.processBatch(FEngineProcessBean.java:244)
at fuego.component.ExecutionThread.work(ExecutionThread.java:839)
at fuego.component.ExecutionThread.run(ExecutionThread.java:408)

Cause

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