we upgraded a cluster from 6.8.8 to 7.8.1. ever since this, we are having elastic nodes die with the below error. everything was working fine before the upgrade. i've googled and haven't found anything to really point me in the direction to find what is causing this. any help would be appreciated.
Caused by: org.elasticsearch.transport.RemoteTransportException: [p-gil1-esdata-9131][10.126.57.31:9300][indices:data/write/bulk[s]] Caused by: org.elasticsearch.common.breaker.CircuitBreakingException: [parent] Data too large, data for [indices:data/write/bulk[s]] would be [31296315898/29.1gb], which is larger than the limit of [30601641984/28.5gb], real usage: [31296311464/29.1gb], new bytes reserved: [4434/4.3kb], usages [request=437866648/417.5mb, fielddata=38637/37.7kb, in_flight_requests=4434/4.3kb, accounting=305567016/291.4mb] at org.elasticsearch.indices.breaker.HierarchyCircuitBreakerService.checkParentLimit(HierarchyCircuitBreakerService.java:347) ~[elasticsearch-7.8.0.jar:7.8.0] at org.elasticsearch.common.breaker.ChildMemoryCircuitBreaker.addEstimateBytesAndMaybeBreak(ChildMemoryCircuitBreaker.java:128) ~[elasticsearch-7.8.0.jar:7.8.0]