集群节点频繁丢失，_cat/nodes出现node not connected exception，获取_cluster/stats信息缺失

es2.3.3集群节点频繁丢失，经问题定位_cat/nodes出现node not connected exception，随即获取_cluster/stats会出现信息中节点个数不符合实际节点数，即节点丢失现象。过一会儿又了好了，这样频繁恢复和丢失。

client异常日志如下，其他节点无异常日志。
'''
[DEBUG][action.admin.cluster.node.stats] [client-node-1] failed to execute on node [zwmCi9UaTq-5OqBK4pQPaQ]
RemoteTransportException[[Failed to deserialize response of type [org.elasticsearch.action.admin.cluster.node.stats.NodeStats]]]; nested: TransportSerializationException[Failed to deserialize response o
f type [org.elasticsearch.action.admin.cluster.node.stats.NodeStats]]; nested: BufferAllocationException[Maximum array size exceeded for this load factor (elements: 1307292079, load factor: 0.750000)];
Caused by: TransportSerializationException[Failed to deserialize response of type [org.elasticsearch.action.admin.cluster.node.stats.NodeStats]]; nested: BufferAllocationException[Maximum array size exc
eeded for this load factor (elements: 1307292079, load factor: 0.750000)];
'''
目前不知道具体什么原因导致，如何修复。各位有遇到和处理类似问题吗？