Hello,
I am using neo4j ogm 2.0.0-M02 (HTTP driver) with neo4j server enterprise
2.3.2. I do some tests and it looks that a deadlock issue happens when I
try to update one node from several threads. My node entity is the
following:
@NodeEntity
public class Node {
@GraphId
Long id;
String oid;
int name;
public Long getId() { return id; }
public void setId(Long id) { this.id = id; }
public String getOid() { return oid; }
public void setOid(String oid) { this.oid = oid; }
public int getName() { return name; }
public void setName(int name) { this.name = name; }
}
After saving one instance of my Node, I send a cypher request with this
code:
Transaction tx = session.beginTransaction();
session.query("match(n: `Node` { oid: '100'}) set n.name = 10",
Collections.EMPTY_MAP);
tx.commit();
tx.close();
Everything works properly. But if I run more than 2 concurrent threads,
each thread executing the code above, a deadlock happens and the execution
stays stuck until reaching the transactions timeout. Executing the same
query without transaction eliminates this issue. Could someone explain me
this behavior ?
Thanks in advance for your help.
Vincent
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