According to the scriptures, a Hindu marriage is in dissolvable in life. Still polygamy was rampantly practiced in ancient Hindu society.
An address by Bhishma to King Yudhishthira in the Mahabharata, succinctly endorses this fact: "A Brahmana can take three wives. A Kshatriya can take two wives. As regards the Vaishya, he should take a wife from only his own order. The children born of these wives should be regarded as equal." (Anusasana Parva, Section XLIV).
... But now that polygamy has been completely gutted out by law, monogamy is the only option for Hindus.
Nowadays if a Brahmin boy gets married without much waiting first time, it is great thing, but second time marrying is next to impossible.
Polygamy in Hinduism