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RuntimePermission error when trying to load the H3 Java library

See original GitHub issue

Hi guys,

As I read on the general H3 roadmap that some help was welcome to integrate H3 with Elasticsearch, I decided to create an Elasticsearch ingest processor that provides support for creating H3 indexes on the fly given a geo location point.

The new processor is packaged as an Elasticsearch plugin and deployed on Elastic Cloud. The plugin instantiates the library using:

    H3Core h3 = H3Core.newInstance();

However, when I make use of the ingest-h3 processor, I’m getting the following error:

      "error" : {
        "root_cause" : [
          {
            "type" : "access_control_exception",
            "reason" : """access denied ("java.lang.RuntimePermission" "loadLibrary./tmp/elasticsearch-4590080898583617881/libh3-java12293578950618569557.so")"""
          }
        ],
        "type" : "access_control_exception",
        "reason" : """access denied ("java.lang.RuntimePermission" "loadLibrary./tmp/elasticsearch-4590080898583617881/libh3-java12293578950618569557.so")"""
      }

Trying to use H3Core.newSystemInstance() yields a similar error, which makes more sense since the h3-java native library is not installed system-wide:

      "error" : {
        "root_cause" : [
          {
            "type" : "access_control_exception",
            "reason" : """access denied ("java.lang.RuntimePermission" "loadLibrary.h3-java")"""
          }
        ],
        "type" : "access_control_exception",
        "reason" : """access denied ("java.lang.RuntimePermission" "loadLibrary.h3-java")"""
      }

It’s also worth noting that in the plugin-security.policy file I have added the following permission:

 permission java.lang.RuntimePermission "loadLibrary.*";

I’m a bit out of solutions and not sure how I can have the H3 native library loaded. If anyone can help shed some light on this, it’d be much appreciated. Thanks!