Solr 6.5.1 crashing when too many queries with error or high memory usage are queried

[Zheng Lin Edwin Yeo]

Hi,

I'm currently facing the issue whereby the Solr crashed when I have issued
too many queries with error or those with high memory usage, like JSON
facet or Streaming expressions.

What could be the issue here?

I'm using Solr 6.5.1

Regards,
Edwin