Is there a limit on # of files in input paths?

[Something Something]

Is there a limit on:

1)  How long the $FILES string can be?
2)  Total # of input paths to process?

when I do this in my Pig script...

*LOAD '$FILES'*
*                AS (xyz:chararray, abc:int);*


org.apache.hadoop.mapreduce.lib.input.FileInputFormat - Total input paths to
process : 4430


Thanks for the help.