Support to detect connection before using if needed by Linary · Pull Request #562 · apache/hugegraph

@Linary mentioned this pull request

Jun 10, 2019

@Linary

Fix #556

Change-Id: I622e285f812098d601061f2515d70629f1e07d88

javeme

@Linary

Change-Id: I827356fd0b35173ea2db1d99b61e03e3b56a2a78