I confirm I have disabled real memory circuit breaker:
GET problem_node:9200/_cluster/settings?include_defaults&flat_settings&local&filter_path=defaults.indices*
{
"defaults": {
"indices.analysis.hunspell.dictionary.ignore_case": "false",
"indices.analysis.hunspell.dictionary.lazy": "false",
"indices.breaker.accounting.limit": "100%",
"indices.breaker.accounting.overhead": "1.0",
"indices.breaker.fielddata.limit": "40%",
"indices.breaker.fielddata.overhead": "1.03",
"indices.breaker.fielddata.type": "memory",
"indices.breaker.request.limit": "60%",
"indices.breaker.request.overhead": "1.0",
"indices.breaker.request.type": "memory",
"indices.breaker.total.limit": "70%",
"indices.breaker.total.use_real_memory": "false",
"indices.breaker.type": "hierarchy",
"indices.cache.cleanup_interval": "1m",
"indices.fielddata.cache.size": "-1b",
"indices.lifecycle.poll_interval": "10m",
"indices.mapping.dynamic_timeout": "30s",
"indices.memory.index_buffer_size": "20%",
"indices.memory.interval": "5s",
"indices.memory.max_index_buffer_size": "6g",
"indices.memory.min_index_buffer_size": "48mb",
"indices.memory.shard_inactive_time": "5m",
"indices.queries.cache.all_segments": "false",
"indices.queries.cache.count": "10000",
"indices.queries.cache.size": "10%",
"indices.query.bool.max_clause_count": "1024",
"indices.query.query_string.allowLeadingWildcard": "true",
"indices.query.query_string.analyze_wildcard": "false",
"indices.recovery.internal_action_long_timeout": "1800000ms",
"indices.recovery.internal_action_timeout": "15m",
"indices.recovery.max_bytes_per_sec": "1024m",
"indices.recovery.max_concurrent_file_chunks": "2",
"indices.recovery.recovery_activity_timeout": "1800000ms",
"indices.recovery.retry_delay_network": "5s",
"indices.recovery.retry_delay_state_sync": "500ms",
"indices.requests.cache.expire": "0ms",
"indices.requests.cache.size": "1%",
"indices.store.delete.shard.timeout": "30s"
}
}