What should a task do when an error of given type is encountered? Only some combinations of values are allowed: ignore (+ stopAfter), retryLater (+ stopAfter), stop.

Item Summary
Name	Type	Multiplicity	Description
ignore	container IgnoreErrorReactionType	[0,1]	Error should be ignored and the processing should continue.
stop	container StopProcessingReactionType	[0,1]	The processing should be stopped.
retryLater	container RetryLaterReactionType	[0,1]	Processing of the specified account should be retried later.
stopAfter	property int	[0,1]	Task is stopped after seeing this number of errors.

Items
- ignore
  
  Flags: RAM,runtime
  
  Multiplicity: [0,1]
  
  Error should be ignored and the processing should continue. E.g. for live sync tasks, the token is advanced to the next item. The ignorance is not complete, though. For example, the error is recorded into the operationExecution item of the object being processed.
- stop
  
  Flags: RAM,runtime
  
  Multiplicity: [0,1]
  
  The processing should be stopped. This is the default strategy for live sync and async update tasks.
- retryLater
  
  Flags: RAM,runtime
  
  Multiplicity: [0,1]
  
  Processing of the specified account should be retried later.
- stopAfter
  
  Flags: RAM,runtime
  
  Multiplicity: [0,1]
  
  Task is stopped after seeing this number of errors. TEMPORARY. Most probably will be replaced by the thresholds mechanism.