java - Application Error when i run my heroku app -

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i'm working java app have deployed in heroku. when run heroku app, app should go host , read csv files. every row in file should saved in table row.

my problem that: if csv files big, when run app resulted in app error. doing test sow if number of row around 600 app run success,if there more 600 there app error.

can explain why happens?


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