Solr deletes already created shards when changing memory size

问题

I am using solrcloud in 5.5.5 version. I have created a collection with two shards with default memory size of 512m. Then my shards got huge data from other system. Now I have 1.2 million documents. I got out of memory error. So I increased SOLR_HEAP (SOLR_HEAP="2g") in solr.in.sh file. After some time, I have noticed that, two created shards got removed from disk. Please anyone have idea about this

来源：https://stackoverflow.com/questions/54240237/solr-deletes-already-created-shards-when-changing-memory-size