Issue 1:
I am having the following configuration:

Neo4j version: 3.2.2

Operating system: Ubuntu 14.04)

API/Driver: Java API

I am trying to load a nodes.csv and relationships.csv like this:

./neo4j-community-3.2.2/bin/neo4j-import --into neo4j-community-3.2.2/data/databases/graph.db --nodes nodes.csv --relationships rels.csv --stacktrace true --skip-bad-relationships true --skip-bad-nodes true --skip-duplicate-nodes true --ignore-empty-strings true --ignore-extra-columns true

I think it is almost done importing but I get the following error:

IMPORT DONE in 35m 27s 271ms.
Imported:
3436328 nodes
71988252 relationships
3436328 properties
Peak memory usage: 592.64 MB
Exception in thread "main" java.lang.OutOfMemoryError: GC overhead limit exceeded
at org.neo4j.kernel.impl.store.kvstore.ConcurrentMapState.sortedUpdates(ConcurrentMapState.java:390)
at org.neo4j.kernel.impl.store.kvstore.ConcurrentMapState.dataProvider(ConcurrentMapState.java:377)
at org.neo4j.kernel.impl.store.kvstore.ConcurrentMapState.dataProvider(ConcurrentMapState.java:363)
at org.neo4j.kernel.impl.store.kvstore.RotationState$Rotation.rotate(RotationState.java:92)
at org.neo4j.kernel.impl.store.kvstore.RotationState$Rotation.rotate(RotationState.java:52)
at org.neo4j.kernel.impl.store.kvstore.AbstractKeyValueStore$RotationTask.rotate(AbstractKeyValueStore.java:311)
at org.neo4j.kernel.impl.store.kvstore.AbstractKeyValueStore$RotationTask.run(AbstractKeyValueStore.java:296)
at org.neo4j.kernel.impl.store.kvstore.ConcurrentMapState$1.close(ConcurrentMapState.java:149)
at org.neo4j.kernel.impl.store.counts.CountsUpdater.close(CountsUpdater.java:155)
at org.neo4j.unsafe.impl.batchimport.ParallelBatchImporter.doImport(ParallelBatchImporter.java:249)
at org.neo4j.tooling.ImportTool.doImport(ImportTool.java:505)
at org.neo4j.tooling.ImportTool.main(ImportTool.java:438)
at org.neo4j.tooling.ImportTool.main(ImportTool.java:347)

Here are samples of the nodes.csv:

"CUI:ID",":LABEL"
"C3609949","['Hippeastrum morelianum Lem.', 'Hippeastrum morelianum']"
"C2056228","['tenderness on palpation of distal phalanx of fifth toe of left foot (physical finding)', 'tenderness on palpation of distal phalanx of fifth toe of left foot']"

and from the relationships.csv:

"CUI:START_ID","CUI:END_ID",":TYPE"
"C0236642","C0270715","RB"
"C0003787","C0037728","RB"
"C0018090","C0032636","RB"
"C0039194","C0024264","RB"
"C0004561","C0024264","RB"
"C0022801","C0035287","RB"
"C0022801","C0227525","RB"
"C0022801","C0449475","RB"
"C0034143","C0682702","RB"

Issue 2:
There is a display issue when displaying 64bit integers, when they are near the max value, the last few digits get rounded

True ID: 436565277858205696 | Web Admin: 436565277858205700

True ID: 436570021204987904 | Web Admin: 436570021204987900

this issue is unfortunately not in with neo4j itself, but a problem with how javascript handles long numbers... It does however make the web based management tools hard to use as you cannot use the values you are seeing. We encountered a similar issue on the front end of our application, and overcame by serializing our Id's as strings on our client view models (not ideal, but we're using a lot of javascript in our front end)