"Exception in thread "main" java.lang.StackOverflowError"

Question

i am getting "Exception in thread "main" java.lang.StackOverflowError" when using regex:

(",(?=([^\"]*\"[^\"]*\")*[^\"]*$)") 

for a long string. Actually I want to split string on the basis of ','(which are outside of "" in .csv files) in .csv files. Its working fine for 450 column but giving error for more column as below---

Exception in thread "main" java.lang.StackOverflowError
    at java.util.regex.Pattern$Curly.match0(Pattern.java:4148)
    at java.util.regex.Pattern$Curly.match(Pattern.java:4132)
    at java.util.regex.Pattern$GroupHead.match(Pattern.java:4556)
    at java.util.regex.Pattern$Loop.match(Pattern.java:4683)
    at java.util.regex.Pattern$GroupTail.match(Pattern.java:4615)
    at java.util.regex.Pattern$BmpCharProperty.match(Pattern.java:3715)
    at java.util.regex.Pattern$Curly.match0(Pattern.java:4170)
    at java.util.regex.Pattern$Curly.match(Pattern.java:4132)
    at java.util.regex.Pattern$BmpCharProperty.match(Pattern.java:3715)
    at java.util.regex.Pattern$Curly.match0(Pattern.java:4170)
    at java.util.regex.Pattern$Curly.match(Pattern.java:4132)
    at java.util.regex.Pattern$GroupHead.match(Pattern.java:4556)
    at java.util.regex.Pattern$Loop.match(Pattern.java:4683)
    at java.util.regex.Pattern$GroupTail.match(Pattern.java:4615)
    at java.util.regex.Pattern$BmpCharProperty.match(Pattern.java:3715)
    at java.util.regex.Pattern$Curly.match0(Pattern.java:4170)
    at java.util.regex.Pattern$Curly.match(Pattern.java:4132)
    at java.util.regex.Pattern$BmpCharProperty.match(Pattern.java:3715)
    at java.util.regex.Pattern$Curly.match0(Pattern.java:4170)
    at java.util.regex.Pattern$Curly.match(Pattern.java:4132)
    at java.util.regex.Pattern$GroupHead.match(Pattern.java:4556)
    at java.util.regex.Pattern$Loop.match(Pattern.java:4683)
    at java.util.regex.Pattern$GroupTail.match(Pattern.java:4615)
    at java.util.regex.Pattern$BmpCharProperty.match(Pattern.java:3715)
    at java.util.regex.Pattern$Curly.match0(Pattern.java:4170)
    at java.util.regex.Pattern$Curly.match(Pattern.java:4132)
    at java.util.regex.Pattern$BmpCharProperty.match(Pattern.java:3715)
    at java.util.regex.Pattern$Curly.match0(Pattern.java:4170)
    at java.util.regex.Pattern$Curly.match(Pattern.java:4132)
    at java.util.regex.Pattern$GroupHead.match(Pattern.java:4556)
    at java.util.regex.Pattern$Loop.match(Pattern.java:4683)
    at java.util.regex.Pattern$GroupTail.match(Pattern.java:4615)
    at java.util.regex.Pattern$BmpCharProperty.match(Pattern.java:3715)
    at java.util.regex.Pattern$Curly.match0(Pattern.java:4170)
    at java.util.regex.Pattern$Curly.match(Pattern.java:4132)
    at java.util.regex.Pattern$BmpCharProperty.match(Pattern.java:3715)
    at java.util.regex.Pattern$Curly.match0(Pattern.java:4170)
    at java.util.regex.Pattern$Curly.match(Pattern.java:4132)
    at java.util.regex.Pattern$GroupHead.match(Pattern.java:4556)
    at java.util.regex.Pattern$Loop.match(Pattern.java:4683)
    at java.util.regex.Pattern$GroupTail.match(Pattern.java:4615)
    at java.util.regex.Pattern$BmpCharProperty.match(Pattern.java:3715)
    at java.util.regex.Pattern$Curly.match0(Pattern.java:4170)
    at java.util.regex.Pattern$Curly.match(Pattern.java:4132)
    at java.util.regex.Pattern$BmpCharProperty.match(Pattern.java:3715)
    at java.util.regex.Pattern$Curly.match0(Pattern.java:4170)
    at java.util.regex.Pattern$Curly.match(Pattern.java:4132)
    at java.util.regex.Pattern$GroupHead.match(Pattern.java:4556)
    at java.util.regex.Pattern$Loop.match(Pattern.java:4683)
    at java.util.regex.Pattern$GroupTail.match(Pattern.java:4615)
    at java.util.regex.Pattern$BmpCharProperty.match(Pattern.java:3715)
    at java.util.regex.Pattern$Curly.match0(Pattern.java:4170)
    at java.util.regex.Pattern$Curly.match(Pattern.java:4132)
    at java.util.regex.Pattern$BmpCharProperty.match(Pattern.java:3715)
    at java.util.regex.Pattern$Curly.match0(Pattern.java:4170)
    at java.util.regex.Pattern$Curly.match(Pattern.java:4132)
    at java.util.regex.Pattern$GroupHead.match(Pattern.java:4556)
    at java.util.regex.Pattern$Loop.match(Pattern.java:4683)
    at java.util.regex.Pattern$GroupTail.match(Pattern.java:4615)
    at java.util.regex.Pattern$BmpCharProperty.match(Pattern.java:3715)
    at java.util.regex.Pattern$Curly.match0(Pattern.java:4170)
    at java.util.regex.Pattern$Curly.match(Pattern.java:4132)
    at java.util.regex.Pattern$BmpCharProperty.match(Pattern.java:3715)
    at java.util.regex.Pattern$Curly.match0(Pattern.java:4170)
    at java.util.regex.Pattern$Curly.match(Pattern.java:4132)
    at java.util.regex.Pattern$GroupHead.match(Pattern.java:4556)
    at java.util.regex.Pattern$Loop.match(Pattern.java:4683)
    at java.util.regex.Pattern$GroupTail.match(Pattern.java:4615)
    at java.util.regex.Pattern$BmpCharProperty.match(Pattern.java:3715)
    at java.util.regex.Pattern$Curly.match0(Pattern.java:4170)
    at java.util.regex.Pattern$Curly.match(Pattern.java:4132)
    at java.util.regex.Pattern$BmpCharProperty.match(Pattern.java:3715)
    at java.util.regex.Pattern$Curly.match0(Pattern.java:4170)
    at java.util.regex.Pattern$Curly.match(Pattern.java:4132)
    at java.util.regex.Pattern$GroupHead.match(Pattern.java:4556)

Answer 1

Use an atomic group instead of a capturing group which you don't need:

,(?=(?>[^\"]*\"[^\"]*\")*[^\"]*$)

That should speed things up and prevent unnecessary backtracking.