Spring - NoSuchMethodException when calling a RestService - spring

Question

I have this simple Mapping that should return me a List objects
#RestController
#RequestMapping(value="/api")
public class ServerRESTController {
#Autowired ServerService serverService;
#RequestMapping(value="/server/{idServer}", method = RequestMethod.GET)
public ResponseEntity<Server> getFloorLatUpdate(#PathVariable int idServer){
Server server = serverService.findById(idServer);
return new ResponseEntity<Server>(server, HttpStatus.OK);
}
#RequestMapping(value="/server/list", method = RequestMethod.GET)
public ResponseEntity<List<Server>> listAllServers(){
List<Server> servers = serverService.findAllServers(-1);
return new ResponseEntity<List<Server>>(servers, HttpStatus.OK);
}
}
Server.class is a model
#Entity
#Table(name = "server")
public class Server implements Serializable{
/**
*
*/
private static final long serialVersionUID = 1L;
private int serverId;
private Piano piano;
private String nomeServer;
private String serverIp;
private String descrizione;
private boolean online;
private Set<Interruttore> interruttori;
private String firmwareVersion;
public Server(){
}
public Server(int serverId, Piano piano, String nomeServer, String serverIp, String descrizione, boolean online,
Set<Interruttore> interruttori, String firmwareVersion){
this.serverId = serverId;
this.piano = piano;
this.nomeServer = nomeServer;
this.descrizione = descrizione;
this.serverIp = serverIp;
this.online = online;
this.interruttori = interruttori;
this.setFirmwareVersion(firmwareVersion);
}
#Id
#Column(name = "id_server", unique = true, nullable = false)
#GeneratedValue(strategy = IDENTITY)
public int getServerId() {
return serverId;
}
public void setServerId(int serverId) {
this.serverId = serverId;
}
#ManyToOne
#JoinColumn(name="id_piano")
public Piano getPiano() {
return piano;
}
public void setPiano(Piano piano) {
this.piano = piano;
}
#Column(name="nome_server")
public String getNomeServer() {
return nomeServer;
}
public void setNomeServer(String nomeServer) {
this.nomeServer = nomeServer;
}
#Column(name="server_ip")
public String getServerIp() {
return serverIp;
}
public void setServerIp(String serverIp) {
this.serverIp = serverIp;
}
#Column(name="descrizione")
public String getDescrizione() {
return descrizione;
}
public void setDescrizione(String descrizione) {
this.descrizione = descrizione;
}
#Column(name="online")
public boolean isOnline() {
return online;
}
public void setOnline(boolean online) {
this.online = online;
}
#JsonIgnore
#OneToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL, mappedBy = "server")
public Set<Interruttore> getInterruttori() {
return interruttori;
}
public void setInterruttori(Set<Interruttore> interruttori) {
this.interruttori = interruttori;
}
#Column(name = "firmware_version")
public String getFirmwareVersion() {
return firmwareVersion;
}
public void setFirmwareVersion(String firmwareVersion) {
this.firmwareVersion = firmwareVersion;
}
#Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((descrizione == null) ? 0 : descrizione.hashCode());
result = prime * result + ((nomeServer == null) ? 0 : nomeServer.hashCode());
result = prime * result + (online ? 1231 : 1237);
result = prime * result + ((piano == null) ? 0 : piano.hashCode());
result = prime * result + serverId;
result = prime * result + ((serverIp == null) ? 0 : serverIp.hashCode());
return result;
}
#Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Server other = (Server) obj;
if (descrizione == null) {
if (other.descrizione != null)
return false;
} else if (!descrizione.equals(other.descrizione))
return false;
if (nomeServer == null) {
if (other.nomeServer != null)
return false;
} else if (!nomeServer.equals(other.nomeServer))
return false;
if (online != other.online)
return false;
if (piano == null) {
if (other.piano != null)
return false;
} else if (!piano.equals(other.piano))
return false;
if (serverId != other.serverId)
return false;
if (serverIp == null) {
if (other.serverIp != null)
return false;
} else if (!serverIp.equals(other.serverIp))
return false;
return true;
}
}
When trying to call for the service i'm getting:
HTTP Status 500 - Request processing failed; nested exception is java.lang.IllegalStateException: Method [listAllServers] was discovered in the .class file but cannot be resolved in the class object
cause by
java.lang.NoSuchMethodException: it.besmart.restcontroller.ServerRESTController.listAllServers()
I cannot understand why this happens, I have always used ResponseEntity in this way... maybe it's for the List?

Answer 1

Please post the whole code so we can find out.
This usually comes when the method is invoked at the wrong place or when there is a mismatch in build and runtime environments or when you miss arguments in a constructor and so on.
Also, you may want to check the files in the classpath. There may be a mismatch between compile time and actual runtime environments for some reason. For example, you say that you build it using command line. So, there may be some discrepancy there, no harm in checking.
Finally, you can check for spelling mistakes - I know that sounds strange, but case sensitivity is important.