Result sets not closing in 3.0.1?

OrientDB Version: 3.0.1

Java Version: 1.8.0_131

OS: CentOS release 6.6 (Final)

Expected behavior

Is it possible OResultSets in 3.0.1 aren't always released when you call .close()? I believe I am calling it on every result set created, yet am still blowing up:

Actual behavior

2018-05-22 16:02:30:765 WARNI {db=sna_new} This database instance has 244850 open command/query result sets, please make sure you close them with OResultSet.close()
2018-05-22 16:02:30:766 WARNI {db=sna_new} This database instance has 262530 open command/query result sets, please make sure you close them with OResultSet.close()
2018-05-22 16:02:30:766 WARNI {db=sna_new} This database instance has 229410 open command/query result sets, please make sure you close them with OResultSet.close()
2018-05-22 16:02:30:766 WARNI {db=sna_new} This database instance has 266900 open command/query result sets, please make sure you close them with OResultSet.close()
2018-05-22 16:02:30:767 WARNI {db=sna_new} This database instance has 234910 open command/query result sets, please make sure you close them with OResultSet.close()
2018-05-22 16:02:30:767 WARNI {db=sna_new} This database instance has 220480 open command/query result sets, please make sure you close them with OResultSet.close()
2018-05-22 16:02:30:767 WARNI {db=sna_new} This database instance has 247970 open command/query result sets, please make sure you close them with OResultSet.close()
2018-05-22 16:02:30:767 WARNI {db=sna_new} This database instance has 256160 open command/query result sets, please make sure you close them with OResultSet.close()
2018-05-22 16:02:30:767 WARNI {db=sna_new} This database instance has 244250 open command/query result sets, please make sure you close them with OResultSet.close()
2018-05-22 16:02:30:767 WARNI {db=sna_new} This database instance has 247840 open command/query result sets, please make sure you close them with OResultSet.close()
2018-05-22 16:02:30:768 WARNI {db=sna_new} This database instance has 248810 open command/query result sets, please make sure you close them with OResultSet.close()
2018-05-22 16:02:30:768 WARNI {db=sna_new} This database instance has 251840 open command/query result sets, please make sure you close them with OResultSet.close()
2018-05-22 16:02:30:768 WARNI {db=sna_new} This database instance has 250910 open command/query result sets, please make sure you close them with OResultSet.close()
2018-05-22 16:02:30:769 WARNI {db=sna_new} This database instance has 261970 open command/query result sets, please make sure you close them with OResultSet.close()
2018-05-22 16:02:30:769 WARNI {db=sna_new} This database instance has 254890 open command/query result sets, please make sure you close them with OResultSet.close()
2018-05-22 16:02:59:447 WARNI {db=sna_new} This database instance has 252990 open command/query result sets, please make sure you close them with OResultSet.close()^C

Steps to reproduce