Gettiing "circuit_breaking_exception" while performing _reindex on multiple indices. Indices sizes are in mb's

[mnehav25 (Neha)]

{
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"failures" : [
{
"shard" : -1,
"reason" : {
"type" : "circuit_breaking_exception",
"reason" : "[parent] Data too large, data for [<transport_request>] would be [29343911180/27.3gb], which is larger than the limit of [29326573568/27.3gb], real usage: [29343910936/27.3gb], new bytes reserved: [244/244b]",
"bytes_wanted" : 29343911180,
"bytes_limit" : 29326573568,
"durability" : "PERMANENT"
}
},
{
"shard" : -1,
"reason" : {
"type" : "circuit_breaking_exception",
"reason" : "[parent] Data too large, data for [<transport_request>] would be [29343911180/27.3gb], which is larger than the limit of [29326573568/27.3gb], real usage: [29343910936/27.3gb], new bytes reserved: [244/244b]",
"bytes_wanted" : 29343911180,
"bytes_limit" : 29326573568,
"durability" : "PERMANENT"
}
},
{
"shard" : -1,
"reason" : {
"type" : "circuit_breaking_exception",
"reason" : "[parent] Data too large, data for [<transport_request>] would be [29343911180/27.3gb], which is larger than the limit of [29326573568/27.3gb], real usage: [29343910936/27.3gb], new bytes reserved: [244/244b]",
"bytes_wanted" : 29343911180,
"bytes_limit" : 29326573568,
"durability" : "PERMANENT"
}
}
]
}