This exception is thrown when an {@link IndexReader} tries to make changes to the index (via {@link IndexReader#deleteDocument}, {@link IndexReader#undeleteAll} or {@link IndexReader#setNorm}) but changes have already been committed to the index since this reader was instantiated. When this happens you must open a new reader on the current index to make the changes.

[SerializableAttribute]
public class StaleReaderException : IOException

<SerializableAttribute> _
Public Class StaleReaderException _
	Inherits IOException

[SerializableAttribute]
public ref class StaleReaderException : public IOException