FTPSClient - Error when trying to connect - java.lang.NoSuchFieldError:

Question

I'm working on trying to connect to an FTPS server to pull over a file. I've managed to create a test application that works just fine, however when I try to put it into the main application (Spring) it fails on the connection and gives this error:
[#|2010-03-16T08:08:01.441-0500|SEVERE|sun-appserver2.1|org.quartz.core.JobRunShell|_ThreadID=16;_ThreadName=jobScheduler_Worker-9;_RequestID=a3641bfd-a137-43c1-9611-4031e2ce24eb;|Job DEFAULT.eventsDataJobDetail threw an unhandled Exception:
org.springframework.scheduling.quartz.JobMethodInvocationFailedException: Invocation of method 'execute' on target class [class com.chw.job.daemon.jobs.eventsdata.EventsDataJob] failed; nested exception is java.lang.NoSuchFieldError: _controlInput_
     at org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean$MethodInvokingJob.executeInternal(MethodInvokingJobDetailFactoryBean.java:269)
     at org.springframework.scheduling.quartz.QuartzJobBean.execute(QuartzJobBean.java:86)
     at org.quartz.core.JobRunShell.run(JobRunShell.java:202)
     at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:525)
Caused by: java.lang.NoSuchFieldError: _controlInput_
     at org.apache.commons.net.ftp.FTPSClient.sslNegotiation(FTPSClient.java:243)
     at org.apache.commons.net.ftp.FTPSClient._connectAction_(FTPSClient.java:166)
     at org.apache.commons.net.SocketClient.connect(SocketClient.java:163)
     at com.chw.job.daemon.jobs.eventsdata.BaseEventsDataFtpJob.test(BaseEventsDataFtpJob.java:78)
     at com.chw.job.daemon.jobs.eventsdata.EventsDataJob.processFile(EventsDataJob.java:54)I've looked at the source code of where it errors on line 243 of the FTPSClient.html and it has the following:
214        /**
215         * SSL/TLS negotiation. Acquires an SSL socket of a control
216         * connection and carries out handshake processing.
217         * @throws IOException A handicap breaks out by sever negotiation.
218         */
219        private void sslNegotiation() throws IOException {
220            // Evacuation not ssl socket.
221            planeSocket = _socket_;
222           
223            initSslContext();
224   
225            SSLSocketFactory ssf = context.getSocketFactory();
226            String ip = _socket_.getInetAddress().getHostAddress();
227            int port = _socket_.getPort();
228            SSLSocket socket =
229                (SSLSocket) ssf.createSocket(_socket_, ip, port, true);
230            socket.setEnableSessionCreation(isCreation);
231            socket.setUseClientMode(isClientMode);
232            // server mode
233            if (!isClientMode) {
234                socket.setNeedClientAuth(isNeedClientAuth);
235                socket.setWantClientAuth(isWantClientAuth);
236            }
237            if (protocols != null) socket.setEnabledProtocols(protocols);
238            if (suites != null) socket.setEnabledCipherSuites(suites);
239   
240            socket.startHandshake();
241   
242            _socket_ = socket;
243            _controlInput_ = new BufferedReader(new InputStreamReader(
244                    socket .getInputStream(), getControlEncoding()));
245            _controlOutput_ = new BufferedWriter(new OutputStreamWriter(
246                    socket.getOutputStream(), getControlEncoding()));
247        }What I'm not understanding at this point of where controlInput is declared? It seems like with that error it is giving, it doesn't know what this is and must get declared somewhere.
Is this a conflict with some other JAR file, as there is quite the list of jar files that is in this application.
Thanks, Michael

Answer 1

Solution: Delete all the build path and all under the deploy path - it must have retained some OLD jar files and was still looking at those...I did that and now it works just fine.