We are exploring OrientDB functionality to understand whether we should 
obtain it's commercial version and we found rather strange issue.

We have configured OrientDB v.1.7.2 on our remote x86_64 GNU/Linux server 
(it is not happening on our local environments [Windows]). 
1) We created a schema for it
2) We exported to it ~600.000 Vertexes and ~600.000 Edges

Everything worked fine, however all the data (all vertexes and edges) were 
removed from the DB (however the schema was not). We have already faced 
this issue 3 times. 

Before the third time we changed server logging level to FINE. And w e also 
noticed some strange log right before the data was removed: 

2014-06-12 10:47:10:893 FINE Checking if memory is lower than configured (-
70b): used 325.13Mb of 853.50Mb (38%) [OMemoryWatchDog$3]
2014-06-12 10:47:18:219 CONF Remote client connected from: OClientConnection 
[id=84, source=?, since=1402588038219] [OClientConnectionManager]
2014-06-12 10:47:18:223 CONF Remote client connected from: OClientConnection 
[id=85, source=/10.2.14.33:39159, since=1402588038222] 
[OClientConnectionManager]
2014-06-12 10:47:18:660 FINE Disconnecting connection with id=85 
[OClientConnectionManager]
2014-06-12 10:47:18:661 FINE Disconnected connection with id=85 but are 
present other active channels [OClientConnectionManager]
2014-06-12 10:47:18:661 FINE Disconnecting connection OClientConnection 
[id=85, source=?, since=1402588038222]... [OClientConnectionManager]
2014-06-12 10:47:18:662 FINE Disconnected connection OClientConnection 
[id=85, source=?, since=1402588038222] found 0 channels 
[OClientConnectionManager]
2014-06-12 10:47:18:674 CONF Remote client connected from: 
OClientConnection [id=86, source=?, since=1402588038673] 
[OClientConnectionManager]
2014-06-12 10:47:18:675 CONF Remote client connected from: 
OClientConnection [id=87, source=/10.2.14.33:39160, since=1402588038674] 
[OClientConnectionManager]
2014-06-12 10:47:19:377 FINE [OFile.openChannel] opening channel for file '/
opt/orientdb-community-1.7.2/databases/GeoLocation/location.pcl' of size: 0 
[OFileClassic]
2014-06-12 10:47:19:383 FINE [OFile.openChannel] opening channel for file '/
opt/orientdb-community-1.7.2/databases/GeoLocation/location.cpm' of size: 0 
[OFileClassic]
2014-06-12 10:47:19:579 FINE [OFile.openChannel] opening channel for file '/
opt/orientdb-community-1.7.2/databases/GeoLocation/belongsto.pcl' of size: 
0 [OFileClassic]
2014-06-12 10:47:19:585 FINE [OFile.openChannel] opening channel for file '/
opt/orientdb-community-1.7.2/databases/GeoLocation/belongsto.cpm' of size: 
0 [OFileClassic]
2014-06-12 10:47:19:753 FINE Disconnecting connection with id=87 
[OClientConnectionManager]
2014-06-12 10:47:19:754 FINE Disconnected connection with id=87 but are 
present other active channels [OClientConnectionManager]
2014-06-12 10:47:19:754 FINE Disconnecting connection OClientConnection 
[id=87, source=?, since=1402588038674]... [OClientConnectionManager]
2014-06-12 10:47:19:754 FINE Disconnected connection OClientConnection 
[id=87, source=?, since=1402588038674] found 0 channels 
[OClientConnectionManager]


Could you please advise me anything to look for? 

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