JPA Named query returns partial Result

[Purna Boyapati]

i have a table PhoneModels
ID, Name , Vendor
1, iphone, Apple
2, Xperia, Sony Erricson
3, Razor, Motorola

i have a corresponding Entity 
class PhoneModel implements Serializable {

	@Id
	@GeneratedValue(strategy = GenerationType.AUTO)
	@Column(nullable = false)
	private Long id;

	@Column(nullable = false)
	private String phoneName;

	@Column(nullable = false)
	private String vendor;

and a corresponding named query

@NamedQuery(name = "phones.findAll", query = "select o from PhoneModels o"),

but weirdly sometimes the result of the above NamedQuery returns me partial result

ID, Name , Vendor
1, <---------------------------missing name and vendor most importantly it is SPORADIC once in 1000 times and it goes of without any change in code or server
2, Xperia, Sony Erricson
3, Razor, Motorola

this is the version we use
EclipseLink, version: Eclipse Persistence Services - 2.1.2.v20101206-r8635