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Simple and Classic Tags Confusion

 
nitin pai
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This is a confusing aspect I am facing as I read two books:

HFSJ mentions about classic tags as having page scope rather than tag scope which means that the tag instance variables will remain SET even as the tag gets completed in the JSP. Thus a tag instance variable is not thread safe...

But the book by Hanumant Deshmukh, SCWCD exam study kit mentions the classic tags having page scope but being thread safe. It says that the tag instance variables are RESET as soon as the tag ends.

What is true from the above?
 
nitin pai
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please anybody who can clear my confusion?
 
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