Develop Reference

Java to Active Directory LDAP java.net.SocketException: Connection or outbound has closed

Good evening,
I have been facing this error for a couple of days by now, and despite looking for a solution all over the web, I coul'd fix this error.
import java.util.Hashtable;
import javax.naming.Context;
import javax.naming.NamingEnumeration;
import javax.naming.directory.Attribute;
import javax.naming.directory.Attributes;
import javax.naming.directory.BasicAttribute;
import javax.naming.directory.BasicAttributes;
import javax.naming.directory.DirContext;
import javax.naming.directory.InitialDirContext;
public class LDAPtest {
public static void main(String[] args) {
try {
String keystorePath = "C:/Program Files/Java/jdk-13.0.2/lib/security/cacerts";
System.setProperty("javax.net.ssl.keyStore", keystorePath);
System.setProperty("javax.net.ssl.keyStorePassword", "changeit");
Hashtable<String, String> ldapEnv = new Hashtable<>();
ldapEnv.put(Context.INITIAL_CONTEXT_FACTORY,"com.sun.jndi.ldap.LdapCtxFactory");
ldapEnv.put(Context.PROVIDER_URL, "ldaps://localhost:10636");
ldapEnv.put(Context.SECURITY_AUTHENTICATION,"simple");
ldapEnv.put(Context.SECURITY_PRINCIPAL,"uid=admin,ou=system");
ldapEnv.put(Context.SECURITY_CREDENTIALS,"secret");
DirContext connection = new InitialDirContext(ldapEnv);
System.out.println("Benvenuto " + connection);
NamingEnumeration enm = connection.list("");
while (enm.hasMore()) {
System.out.println(enm.next());
}
enm.close();
connection.close();
}catch(Exception e) {
e.printStackTrace();
}
}
}
This code is actually working when SSL is not tested, replacing the
ldapEnv.put(Context.PROVIDER_URL, "ldaps://localhost:10636");
with
ldapEnv.put(Context.PROVIDER_URL, "ldap://localhost:10389");
I made the setup for the LDAP server with Apache Directory Studio, and followed this tutorial here in order to get the LDAPS to work:
http://directory.apache.org/apacheds/basic-ug/3.3-enabling-ssl.html
So I made the certificate, even installed it and imported it with keytool into cacerts.
I enabled portforwarding for the chosen port (10636), but still, I'm getting this exception:
javax.naming.CommunicationException: simple bind failed: localhost:10636 [Root exception is
java.net.SocketException: Connection or outbound has closed]
at java.naming/com.sun.jndi.ldap.LdapClient.authenticate(LdapClient.java:219)
at java.naming/com.sun.jndi.ldap.LdapCtx.connect(LdapCtx.java:2795)
at java.naming/com.sun.jndi.ldap.LdapCtx.<init>(LdapCtx.java:320)
at java.naming/com.sun.jndi.ldap.LdapCtxFactory.getLdapCtxFromUrl(LdapCtxFactory.java:225)
at java.naming/com.sun.jndi.ldap.LdapCtxFactory.getUsingURL(LdapCtxFactory.java:189)
at java.naming/com.sun.jndi.ldap.LdapCtxFactory.getUsingURLs(LdapCtxFactory.java:243)
at java.naming/com.sun.jndi.ldap.LdapCtxFactory.getLdapCtxInstance(LdapCtxFactory.java:154)
at java.naming/com.sun.jndi.ldap.LdapCtxFactory.getInitialContext(LdapCtxFactory.java:84)
at java.naming/javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:730)
at java.naming/javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:305)
at java.naming/javax.naming.InitialContext.init(InitialContext.java:236)
at java.naming/javax.naming.InitialContext.<init>(InitialContext.java:208)
at java.naming/javax.naming.directory.InitialDirContext.<init>(InitialDirContext.java:130)
at Prova3.main(Prova3.java:31)
Caused by: java.net.SocketException: Connection or outbound has closed
at java.base/sun.security.ssl.SSLSocketImpl$AppOutputStream.write(SSLSocketImpl.java:1246)
at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81)
at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142)
at java.naming/com.sun.jndi.ldap.Connection.writeRequest(Connection.java:398)
at java.naming/com.sun.jndi.ldap.Connection.writeRequest(Connection.java:371)
at java.naming/com.sun.jndi.ldap.LdapClient.ldapBind(LdapClient.java:359)
at java.naming/com.sun.jndi.ldap.LdapClient.authenticate(LdapClient.java:214)
... 13 more
Thank you in advance

For Googlers:
simple bind failed errors are almost always related to SSL connection.
With nc or telnet, check whether a connection can be established between client and remote host and port.
With SSLPoke.java (a simple Java class to check SSL connection), check whether certificates are correctly imported and used, also check correct TLS version. Use something like java -Dhttps.protocols=TLSv1,TLSv1.1,TLSv1.2 -Djavax.net.debug=all SSLPoke google.com 443 > log.txt 2>&1.
Look for:
Warning: no suitable certificate found - continuing without client authentication = check whether you have set javax.net.ssl.trustStore
Fatal (HANDSHAKE_FAILURE): Couldn't kickstart handshaking = could be mismatched TLS versions
Also check whether your intermediate CA is expired

running Kafka on WSL and make producer on windows

I'm running Kafka on WSL. I'm trying to make simple producer like this (I'm using intellj)
import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.ProducerConfig;
import org.apache.kafka.clients.producer.ProducerRecord;
import org.apache.kafka.common.serialization.StringSerializer;
import java.util.Properties;
public class ProducerDemo {
public static void main(String[] args) {
String bootstrapServers = "127.0.0.1:9092";
//create Producer properties
Properties properties = new Properties();
properties.setProperty(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG,bootstrapServers);
properties.setProperty(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class.getName());
properties.setProperty(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG,StringSerializer.class.getName());
//create the producer
KafkaProducer<String,String> producer = new KafkaProducer<String, String>(properties);
//create a producer record
ProducerRecord<String,String> record =
new ProducerRecord<String, String>("first_topic","hallo world");
//send data
producer.send(record);
//flush + close
producer.flush();
producer.close();
}
}
but there's a problem, when I try to run the code it shows this error
[kafka-producer-network-thread | producer-1] WARN org.apache.kafka.clients.NetworkClient - [Producer clientId=producer-1] Error connecting to node AD17-2.localdomain:9092 (id: 0 rack: null)
java.net.UnknownHostException: No such host is known (AD17-2.localdomain)
at java.base/java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
at java.base/java.net.InetAddress$PlatformNameService.lookupAllHostAddr(InetAddress.java:932)
at java.base/java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1505)
at java.base/java.net.InetAddress$NameServiceAddresses.get(InetAddress.java:851)
at java.base/java.net.InetAddress.getAllByName0(InetAddress.java:1495)
at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1354)
at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1288)
at org.apache.kafka.clients.ClientUtils.resolve(ClientUtils.java:110)
at org.apache.kafka.clients.ClusterConnectionStates$NodeConnectionState.currentAddress(ClusterConnectionStates.java:403)
at org.apache.kafka.clients.ClusterConnectionStates$NodeConnectionState.access$200(ClusterConnectionStates.java:363)
at org.apache.kafka.clients.ClusterConnectionStates.currentAddress(ClusterConnectionStates.java:151)
at org.apache.kafka.clients.NetworkClient.initiateConnect(NetworkClient.java:955)
at org.apache.kafka.clients.NetworkClient.ready(NetworkClient.java:293)
at org.apache.kafka.clients.producer.internals.Sender.sendProducerData(Sender.java:350)
at org.apache.kafka.clients.producer.internals.Sender.runOnce(Sender.java:323)
at org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:239)
at java.base/java.lang.Thread.run(Thread.java:832)
Process finished with exit code -1
i even checked the port on my Windows
TCP 0.0.0.0:9092 0.0.0.0:0 LISTENING
my question is, is it impossible to make producer on windows and while running kafka on WSL ?

Your Kafka broker is using the local hostname (AD17-2.localdomain) in its advertised listener. When you client connects to it initially on 127.0.0.1:9092 the broker returns this address for it to connect to for producing messages. Your producer fails to resolve this address, and fails.
To fix it, in the broker's server.properties set
advertised.listeners=PLAINTEXT://127.0.0.1:9092
listener.security.protocol.map=PLAINTEXT:PLAINTEXT
listeners=PLAINTEXT://0.0.0.0:9092
More info: https://rmoff.net/2018/08/02/kafka-listeners-explained/

It works for me with this solution:
Whit the command: "ip addr | grep eth0" on Ubuntu terminal I can get external interface IP, I set this IP on advertised.listener and with the command:
netsh interface portproxy add v4tov4 listenport=9092 listenaddress=0.0.0.0 connectport=9092 connectaddress=XXX.XX.XX.XX
on Windows cmd I can forward ports. With the command "netstat -ab" I can see on Windows cmd the IP and Port TCP 0.0.0.0:9092. It works correctly!
Running Kafka Confluent Platform on WSL 2 (Ubuntu Distribution) and Spring application on Windows (Broker may not be available)

Connecting to dcm4chee using dcm4che from a JAVA program

Update
I dug deeper in dcm4che's source code and found that an IncompatibleConnectionException is thrown if either
a connection is "not installed"
or the types of protocols are not set or don't match.
I don't know what it means that a connection is "installed" but this flag can be set manually, so I set it for both the local and remote connections to true (even checked them with getInstalled() whether they are "installed" - and yes they are now - previously this property was null).
And as to the protocols, they weren't specified, so for both connections I set them to DICOM.
Results: I still get the same Exception.
I'd like to establish a DICOM association between dcm4chee (2.18.3) and my JAVA application using the dcm4che (5.12.0) toolkit.
The problem is that it doesn't seem to be any documentation available on how to use dcm4che in a JAVA application, so all I can do is read dcm4che's source code and try to figure out what its classes and methods are for, but I'm stuck. If someone already has a working example it would be very helpful.
So far I have:
import org.dcm4che3.net.ApplicationEntity;
import org.dcm4che3.net.Association;
import org.dcm4che3.net.Connection;
import org.dcm4che3.net.Device;
import org.dcm4che3.net.pdu.AAssociateRQ;
import org.dcm4che3.net.pdu.PresentationContext;
...
ApplicationEntity locAE = new ApplicationEntity();
locAE.setAETitle("THIS_JAVA_APP");
Connection localConn = new Connection();
localConn.setCommonName("loc_conn");
localConn.setHostname("localhost");
localConn.setPort(11112);
localConn.setProtocol(Connection.Protocol.DICOM);
localConn.setInstalled(true);
locAE.addConnection(localConn);
ApplicationEntity remAE = new ApplicationEntity();
remAE.setAETitle("DCM4CHEE");
Connection remoteConn = new Connection();
remoteConn.setCommonName("rem_conn");
remoteConn.setHostname("localhost");
remoteConn.setPort(11112);
remoteConn.setProtocol(Connection.Protocol.DICOM);
remoteConn.setInstalled(true);
remAE.addConnection(remoteConn);
AAssociateRQ assocReq = new AAssociateRQ();
assocReq.setCalledAET(remAE.getAETitle());
assocReq.setCallingAET(locAE.getAETitle());
assocReq.setApplicationContext("1.2.840.10008.3.1.1.1");
assocReq.setImplClassUID("1.2.40.0.13.1.3");
assocReq.setImplVersionName("dcm4che-5.12.0");
assocReq.setMaxPDULength(16384);
assocReq.setMaxOpsInvoked(0);
assocReq.setMaxOpsPerformed(0);
assocReq.addPresentationContext(new PresentationContext(
1, "1.2.840.10008.1.1", "1.2.840.10008.1.2"));
Device device = new Device("device");
device.addConnection(localConn);
device.addApplicationEntity(locAE);
Association assoc = locAE.connect(remAE, assocReq);
but I don't know whether I'm on the right path doing it.
The error I get:
org.dcm4che3.net.IncompatibleConnectionException: No compatible connection to DCM4CHEE available on THIS_JAVA_APP
at org.dcm4che3.net.ApplicationEntity.findCompatibelConnection(ApplicationEntity.java:646)
at org.dcm4che3.net.ApplicationEntity.connect(ApplicationEntity.java:651)

Could it be, that You are missing a Device instance from Your setup? It seems, that You need a Device, to which You attach both ApplicationEntity and Connection.
Looking at FindSCU.java source from dcm4che source.
private final Device device = new Device("findscu");
private final ApplicationEntity ae = new ApplicationEntity("FINDSCU");
private final Connection conn = new Connection();
public FindSCU() throws IOException {
device.addConnection(conn);
device.addApplicationEntity(ae);
ae.addConnection(conn);
}
I also think, that maybe the local Connection object can be instantiated without any parameters as the FindSCU example here demonstrates. Maybe the parameters are confusing it somehow, especially considering, that you have both local and remote connections pointing to localhost:11112.
But yes, one has to agree, that the documentation for dcm4che3 API is totally inadequate.

Here is the working code: (I don't know if it's the minimal solution, feel free to experiment with it...)
ApplicationEntity locAE = new ApplicationEntity();
locAE.setAETitle("THIS_JAVA_APP");
locAE.setInstalled(true);
Connection localConn = new Connection();
localConn.setCommonName("loc_conn");
localConn.setHostname("localhost");
localConn.setPort(11112);
localConn.setProtocol(Connection.Protocol.DICOM);
localConn.setInstalled(true);
locAE.addConnection(localConn);
ApplicationEntity remAE = new ApplicationEntity();
remAE.setAETitle("DCM4CHEE");
remAE.setInstalled(true);
Connection remoteConn = new Connection();
remoteConn.setCommonName("rem_conn");
remoteConn.setHostname("localhost");
remoteConn.setPort(11112);
remoteConn.setProtocol(Connection.Protocol.DICOM);
remoteConn.setInstalled(true);
remAE.addConnection(remoteConn);
AAssociateRQ assocReq = new AAssociateRQ();
assocReq.setCalledAET(remAE.getAETitle());
assocReq.setCallingAET(locAE.getAETitle());
assocReq.setApplicationContext("1.2.840.10008.3.1.1.1");
assocReq.setImplClassUID("1.2.40.0.13.1.3");
assocReq.setImplVersionName("dcm4che-5.12.0");
assocReq.setMaxPDULength(16384);
assocReq.setMaxOpsInvoked(0);
assocReq.setMaxOpsPerformed(0);
assocReq.addPresentationContext(new PresentationContext(
1, "1.2.840.10008.1.1", "1.2.840.10008.1.2"));
Device device = new Device("device");
device.addConnection(localConn);
device.addApplicationEntity(locAE);
Executor exec = (Runnable command) -> {};
device.setExecutor(exec);
Association assoc = locAE.connect(localConn, remoteConn, assocReq);
And the relevant dcm4chee log:
2018-03-02 23:21:42,832 INFO THIS_JAVA_APP->DCM4CHEE (TCPServer-1) [org.dcm4cheri.net.FsmImpl] received AAssociateRQ
appCtxName: 1.2.840.10008.3.1.1.1/DICOM Application Context Name
implClass: 1.2.40.0.13.1.3
implVersion: dcm4che-5.12.0
calledAET: DCM4CHEE
callingAET: THIS_JAVA_APP
maxPDULen: 16378
asyncOpsWindow:
pc-1: as=1.2.840.10008.1.1/Verification SOP Class
ts=1.2.840.10008.1.2/Implicit VR Little Endian
2018-03-02 23:21:42,843 INFO THIS_JAVA_APP->DCM4CHEE (TCPServer-1) [org.dcm4cheri.net.FsmImpl] sending AAssociateAC
appCtxName: 1.2.840.10008.3.1.1.1/DICOM Application Context Name
implClass: 1.2.40.0.13.1.1.1
implVersion: dcm4che-1.4.34
calledAET: DCM4CHEE
callingAET: THIS_JAVA_APP
maxPDULen: 16352
asyncOpsWindow:
pc-1: 0 - acceptance
ts=1.2.840.10008.1.2/Implicit VR Little Endian
After you have the association, see this other post for how to perform a C-FIND.

Edit
Apparently, I solved the problem. Changing the executor from
Executor exec = (Runnable command) -> {};
device.setExecutor(exec);
to
ExecutorService executorService = Executors.newSingleThreadExecutor();
ScheduledExecutorService scheduledExecutorService = Executors.newSingleThreadScheduledExecutor();
device.setExecutor(executorService);
device.setScheduledExecutor(scheduledExecutorService);
made it so my application correctly received the association response from the server. This might serve as reference for someone else.
Thank you for sharing your code. It was really helpful to me.
Original Post
I am unable to perform the connection with a code similar to the solution you proposed. I am trying to request an association with a dcm4chee-arc-light with dcm4che (both 5.14.1), and I have as it follows:
Device device = new Device(deviceName);
ApplicationEntity locAE = new ApplicationEntity(localAE);
Connection conn = new Connection();
Connection remote = new Connection();
AAssociateRQ rq = new AAssociateRQ();
device.addConnection(conn);
device.addApplicationEntity(locAE);
locAE.addConnection(conn);
ApplicationEntity remAE = new ApplicationEntity();
remAE.setAETitle(remoteAE);
remote.setCommonName("rem_conn");
remote.setHostname(remoteIP);
remote.setPort(remotePort);
remote.setProtocol(Connection.Protocol.DICOM);
remAE.addConnection(remote);
rq.setCalledAET(remAE.getAETitle());
rq.setCallingAET(locAE.getAETitle());
rq.setApplicationContext("1.2.840.10008.3.1.1.1");
rq.setImplClassUID("1.2.40.0.13.1.3");
rq.setImplVersionName("dcm4che-5.14.1");
rq.setMaxPDULength(16384);
rq.setMaxOpsInvoked(0);
rq.setMaxOpsPerformed(0);
rq.addPresentationContext(new PresentationContext(
1, "1.2.840.10008.5.1.4.1.2.2.1", "1.2.840.10008.1.2"));
Executor exec = (Runnable command) -> {};
device.setExecutor(exec);
//Opens association and connects to remote server
Association as = locAE.connect(conn, remote, rq);
But when trying to connect to a remote AET, it doesn't seem to receive the AAssociation response from the remote AET. My Java application hangs in Sta5 (waiting for association response) while the server hangs in Sta6 (ready for data transfer).
Java log:
[main] INFO org.dcm4che3.net.Connection - Initiate connection from 0.0.0.0/0.0.0.0:0 to localhost:11112
[main] INFO org.dcm4che3.net.Connection - Established connection Socket[addr=localhost/127.0.0.1,port=11112,localport=50101]
[main] DEBUG org.dcm4che3.net.Association - /127.0.0.1:50101>localhost/127.0.0.1:11112(1): enter state: Sta4 - Awaiting transport connection opening to complete
[main] INFO org.dcm4che3.net.Association - DEVICEAE->DCMQRSCP(1) << A-ASSOCIATE-RQ
[main] DEBUG org.dcm4che3.net.Association - A-ASSOCIATE-RQ[
calledAET: DCMQRSCP
callingAET: DEVICEAE
applicationContext: 1.2.840.10008.3.1.1.1 - DICOM Application Context Name
implClassUID: 1.2.40.0.13.1.3
implVersionName: dcm4che-5.14.1
maxPDULength: 16378
maxOpsInvoked/maxOpsPerformed: 1/1
PresentationContext[id: 1
as: 1.2.840.10008.5.1.4.1.2.2.1 - Study Root Query/Retrieve Information Model - FIND
ts: 1.2.840.10008.1.2 - Implicit VR Little Endian
]
]
[main] DEBUG org.dcm4che3.net.Association - DEVICEAE->DCMQRSCP(1): enter state: Sta5 - Awaiting A-ASSOCIATE-AC or A-ASSOCIATE-RJ PDU
Server log:
19:11:29,397 INFO - Accept connection Socket[addr=/127.0.0.1,port=50101,localport=11112]
19:11:29,397 DEBUG - /127.0.0.1:11112<-/127.0.0.1:50101(3): enter state: Sta2 - Transport connection open
19:11:29,416 INFO - DCMQRSCP<-DEVICEAE(3) >> A-ASSOCIATE-RQ
19:11:29,416 DEBUG - A-ASSOCIATE-RQ[
calledAET: DCMQRSCP
callingAET: DEVICEAE
applicationContext: 1.2.840.10008.3.1.1.1 - DICOM Application Context Name
implClassUID: 1.2.40.0.13.1.3
implVersionName: dcm4che-5.14.1
maxPDULength: 16378
maxOpsInvoked/maxOpsPerformed: 1/1
PresentationContext[id: 1
as: 1.2.840.10008.5.1.4.1.2.2.1 - Study Root Query/Retrieve Information Model - FIND
ts: 1.2.840.10008.1.2 - Implicit VR Little Endian
]
]
19:11:29,419 DEBUG - DCMQRSCP<-DEVICEAE(3): enter state: Sta3 - Awaiting local A-ASSOCIATE response primitive
19:11:29,419 INFO - DCMQRSCP<-DEVICEAE(3) << A-ASSOCIATE-AC
19:11:29,419 DEBUG - A-ASSOCIATE-AC[
calledAET: DCMQRSCP
callingAET: DEVICEAE
applicationContext: 1.2.840.10008.3.1.1.1 - DICOM Application Context Name
implClassUID: 1.2.40.0.13.1.3
implVersionName: dcm4che-5.14.1
maxPDULength: 16378
maxOpsInvoked/maxOpsPerformed: 1/1
PresentationContext[id: 1
result: 0 - acceptance
ts: 1.2.840.10008.1.2 - Implicit VR Little Endian
]
]
19:11:29,427 DEBUG - DCMQRSCP<-DEVICEAE(3): enter state: Sta6 - Association established and ready for data transfer
I feel like I am missing something, but I cannot find the source of the problem. Any help is appreciated, as I am still new to dcm4che and DICOM protocol.
Thank you.

informix jdbc stuck connecting

I'm trying to connect to a Informix database server with jdbc using the standard way :
connection = DriverManager.getConnection("jdbc:informix-sqli://"+ip+
/"+sid+":INFORMIXSERVER="+server+";user="+user+";password="+pass+"");
But it keeps trying to connect and does not throw a error message (I suppose it tries to connect because it does not show anything). I'm using IBM Informix driver 4.10.00.1534 and Java 1.7.
I have been using this method to connect to Informix servers until now, in fact it only fails with one server. I can connect to this server through Informix clients with odbc but it keeps failing with jdbc with no error message.
Is there any method to verbose the jdbc connection? Any suggestion about why it fails?
UPDATE: The sqlidebug trace:
C->S (4)
SQ_VERSION
SQ_EOT
S->C (14)
SQ_VERSION
"7.31.TD6" [8]
SQ_EOT
C->S (66)
SQ_INFO
INFO_ENV
Name Length = 12
Value Length = 8
"DBTIME"="%d/%M/%Y"
"DBTEMP"="/tmp"
"SUBQCACHESZ"="10"
INFO_DONE
SQ_EOT
S->C (2)
SQ_EOT
C->S (16)
SQ_DBOPEN
"database" [8]
NOT EXCLUSIVE
SQ_EOT
S->C (28)
SQ_DONE
Warning..: 0x15
# rows...: 0
rowid....: 0
serial id: 0
SQ_COST
estimated #rows: 1
estimated I/O..: 1
SQ_EOT
C->S (78)
SQ_PREPARE
# values: 0
CMD.....: "select site from informix.systables where tabname = ' GL_COLLATE'" [65]
SQ_NDESCRIBE
SQ_WANTDONE
SQ_EOT
And the jdbctrace.log says:
trying com.informix.jdbc.IfxDriver
SQLWarning: reason(Database selected) SQLState(01I04)
SQLWarning: reason(Float to decimal conversion has been used) SQLState(01I05)
SQLWarning: reason(Database has transactions) SQLState(01I01)
SQLWarning: reason(Database selected) SQLState(01I04)
SQLWarning: reason(Database has transactions) SQLState(01I01)
SQLWarning: reason(Database selected) SQLState(01I04)

Try to run code that connects do Informix database but also shows full exception info and create trace files. One trace file is for JDBC, one is for Informix. Change URL to database, username and password, and run it. You will probably see the problem on screen or in trace file:
import java.io.FileWriter;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
class informix_trace
{
public static void main(String[] args)
{
try
{
Class.forName("com.informix.jdbc.IfxDriver");
FileWriter fwTrace = new FileWriter("c:\\JDBCTrace.log");
PrintWriter pwTrace = new PrintWriter(fwTrace);
DriverManager.setLogWriter(pwTrace);
String debug_url = "SQLIDEBUG=C:\\sqlidebug.trace";
String url = "jdbc:informix-sqli://1.2.3.4:9088/test_db:informixserver=ol_testifx;DB_LOCALE=pl_PL.CP1250;CLIENT_LOCALE=pl_PL.CP1250;charSet=CP1250;" + debug_url
Connection connection = DriverManager.getConnection(url, "user", "passwd");
Statement statement = connection.createStatement();
ResultSet resultSet = statement.executeQuery("SELECT FIRST 1 DBINFO('version','full') FROM systables;");
while (resultSet.next())
System.out.println(resultSet.getObject(1));
}
catch (Exception e)
{
e.printStackTrace();
}
}
} // class informix_trace
Informix trace file will be with some postfix (timestamp or similar info) and in my case it was something like sqlidebug.trace1391758523500.0. It is binary but you can analyze it using sqliprt utility.
Example of my session with wrong database name:
c:\>sqliprt sqlidebug.trace1391758523500.0
SQLIDBG Version 1
...
S->C (12)
SQ_ERR
SQL error..........: -329
ISAM/RSAM error....: -111
Offset in statement: 0
Error message......: "" [0]
SQ_EOT
In JDBCTrace.log I can found more interesting info (I see it also on my screen):
SQLState(IX000) vendor code(-111)
java.sql.SQLException: ISAM error: no record found.
at com.informix.util.IfxErrMsg.getSQLException(IfxErrMsg.java:413)
at com.informix.jdbc.IfxSqli.E(IfxSqli.java:3412)
at com.informix.jdbc.IfxSqli.dispatchMsg(IfxSqli.java:2324)
....
at java.sql.DriverManager.getConnection(Unknown Source)
at informix_trace.main(informix_trace.java:20)
getConnection failed: java.sql.SQLException: No database found or wrong system privileges.
(I have translated it from Polish so it can be little different)

My suggestion is to:
build ConnectString and show us its full content, this way we will see if in ip there is only IP address or if it is with port number
instead of adding username and password to ConnectString use 3 parameter version of getConnection() just like:
getConnection("jdbc:informix-sqli://169.0.5.10:9088/test_db:informixserver=ol_test;DB_LOCALE=pl_PL.CP1250;CLIENT_LOCALE=pl_PL.CP1250;charSet=CP1250", username, password)
(of course set your own locale instead of my Polish locale)
To spy network traffic use tools like Wireshark. Start capturing ip traffic to your Informix database. In my case Wireshark rule is:
ip.addr == 169.0.5.10
If I set up wrong IP Wireshark will display "Destination unreachable".
You can also see someting using netstat:
c:\>netstat -an | grep 9088
TCP 169.0.1.126:4295 169.0.5.10:9088 TIME_WAIT
It was when my application stopped working.
In case of error (wrong IP port) I see:
c:\>netstat -an | grep 9089
TCP 169.0.1.126:4398 169.0.5.10:9089 SYN_SENT

IBM says that: From version 3.00.JC1 of IBM® Informix® JDBC Driver onwards, debug drivers are no longer shipped.
Informix JDBC Driver now supports SQLIDEBUG. You no longer need to set values for TRACE, TRACEFILE or PROTOCOLTRACE, PROTOCOLTRACEFILE. You only need to set SQLIDEBUG. and the page goes on to outline the steps you need to create a trace. Copying:
Set the CLASSPATH to the Informix JDBC Driver package.
c:\Infx\Java>set
CLASSPATH=C:\infx\JDBC3.00JC3\lib\ifxjdbc.jar;C:\infx\JDBC3.00JC3\lib\ifxjdbcx.jar;.
Compile simple.java
c:\Infx\Java>javac simple.java
Ensure that SQLIDEBUG is set correctly
c:\Infx\Java>grep SQLIDEBUG simple.java
conn=DriverManager.getConnection("jdbc:informix-sqli://irk:1526/sysmaster:INFORMIXSERVER=irk940;USER=informix;
PASSWORD=ximrofni;SQLIDEBUG=C:\infx\java\trace");
Note: SQLIDEBUG is set in the connection string. It points to where
the trace file will be found with a certain format i.e.
trace.xxxxxxx
Remove or move all other trace files
c:\Infx\Java>del trace*
Run java.simple
c:\Infx\Java>java simple systables syscolumns ... ...
oledbordinals
Then locate the trace file
c:\Infx\Java>dir trace* Volume in drive C has no label. Volume
Serial Number is B823-46D8
Directory of c:\Infx\Java
04/04/2006 14:12 20,560 trace1144156355642.0 1 File(s) 20,560 bytes
0 Dir(s) 4,067,995,648 bytes free
c:\Infx\Java>
You will be able to see that a trace file has been created however
you will not be able to read the file.
Send the trace file to your local technical support office for
analysis.
Of course, if you're not using Version 3.00.JC1 of the Informix drivers, ignore the above and follow a different set of instructions; again duplicated for your convenience:
To turn on tracing, specify the environment variables TRACE,
TRACEFILE, PROTOCOLTRACE, and PROTOCOLTRACEFILE in the database URL or
the property list when you establish a connection to an Informix
database or database server. TRACE can be set to one of the following
levels:
Tracing not enabled. This is the default value.
Traces the entry and exit points of methods.
Same as Level 1, plus generic error messages are also traced.
Same as Level 2, plus data variables are also traced. TRACEFILE Specifies the full pathname of the operating system file on the client
computer to which the TRACE messages are written.
PROTOCOLTRACE traces the SQLI protocol messages sent between your Java
program and the Informix database server.
Can be set to the following levels:
Protocol tracing not enabled. This is the default value.
Traces message IDs.
Same as Level 1, plus the data in the message packets are also traced. PROTOCOLTRACFILE specifies the full pathname of the operating
system file on the client computer to which the PROTOCOLTRACE messages
are written.
Hope that helps

try different jdbc version
check NETTYPE configuration parameter and compare it with current number of informix sessions
dump java thread states (kill -3 ) when jdbc connection hangs

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import com.informix.*;
public class DBConnect {
static String url="jdbc:informix-sqli://host_name:port/database_name:INFORMIXSERVER=server;user=username;password=password";
public static void main(String [] args){
try {
Class.forName("com.informix.jdbc.IfxDriver");
}catch (Exception e){
System.out.println("ERROR: failed to load Informix JDBC driver.");
e.printStackTrace();
return;
}
try{
DriverManager.registerDriver((com.informix.jdbc.IfxDriver)Class.forName("com.informix.jdbc.IfxDriver").newInstance());
}catch(Exception ex){
System.out.println("Driver is not Registered");
}
try{
Connection conn = DriverManager.getConnection(url);
System.out.println("Connection Successful");
}catch (SQLException e){
System.out.println("ERROR: failed to connect!");
System.out.println("ERROR: " + e.getMessage());
e.printStackTrace();
return;
}
}
}
For more info go through [this book] (http://www.cursor-distribution.de/aktuell.11.70.xC6/documentation/ids_jdbc_bookmap.pdf)

The problem I encountered was that Informix was listening on local IPv6 address on port 7360, command netstat -a was displaying this format :
TCP [feab::11ab:78ab:efab:8aab%17]:7360 myhostname:0 LISTENING
Therefore my jdbc connection was always failing until I figured out I should have use the IPv6 address in the URL :
jdbc:informix-sqli://fe80::1125:78c0:ef17:8ab5%17:7360:user=informix;password=test;INFORMIXSERVER=ol_informix1210_2
You can test that the connection is working with this simple script :
/***************************************************************************
*
* Title: SimpleConnection.java
*
* Description: Demo a connection to a server (no database specified)
*
* An example of running the program:
*
* java SimpleConnection
* 'jdbc:informix-sqli://myhost:1533:user=<username>;password=<password>'
*
* Expected result:
*
* >>>Simple Connection test.
* URL = "jdbc:informix-sqli://myhost:1533:user=<username>;password=<password>"
* >>>End of Simple Connection test.
*
***************************************************************************
*/
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class SimpleConnection {
public static void main(String[] args) {
if (args.length == 0) {
System.out.println("FAILED: connection URL must be provided in order to run the demo!");
return;
}
String url = args[0];
String testName = "Simple Connection";
Connection conn = null;
System.out.println(">>>" + testName + " test.");
System.out.println("URL = \"" + url + "\"");
try {
Class.forName("com.informix.jdbc.IfxDriver");
} catch (Exception e) {
System.out.println("FAILED: failed to load Informix JDBC driver.");
}
try {
PrintWriter out = new PrintWriter(System.out, true);
DriverManager.setLogWriter(out);
conn = DriverManager.getConnection(url);
} catch (SQLException e) {
System.out.println("FAILED: failed to connect!");
}
try {
conn.close();
} catch (SQLException e) {
System.out.println("FAILED: failed to close the connection!");
}
System.out.println(">>>End of " + testName + " test.");
}
}

Basics of Hector & Cassandra

I'm working with Cassandra-0.8.2.
I am working with the most recent version of Hector &
My java version is 1.6.0_26
I'm very new to Cassandra & Hector.
What I'm trying to do:
1. connect to an up & running instance of cassandra on a different server. I know it's running b/c I can ssh through my terminal into the server running this Cassandra instance and run the CLI with full functionality.
2. then I want to connect to a keyspace & create a column family and then add a value to that column family through Hector.
I think my problem is that this running instance of Cassandra on this server might not be configured to get commands that are not local. I think my next step will be to add a local instance of Cassandra on the cpu I'm working on and try to do this locally. What do you think?
Here's my Java code:
import me.prettyprint.cassandra.serializers.StringSerializer;
import me.prettyprint.cassandra.service.CassandraHostConfigurator;
import me.prettyprint.hector.api.Cluster;
import me.prettyprint.hector.api.Keyspace;
import me.prettyprint.hector.api.ddl.ColumnFamilyDefinition;
import me.prettyprint.hector.api.ddl.ComparatorType;
import me.prettyprint.hector.api.factory.HFactory;
import me.prettyprint.hector.api.mutation.Mutator;
public class MySample {
public static void main(String[] args) {
Cluster cluster = HFactory.getOrCreateCluster("Test Cluster", "xxx.xxx.x.41:9160");
Keyspace keyspace = HFactory.createKeyspace("apples", cluster);
ColumnFamilyDefinition cf = HFactory.createColumnFamilyDefinition("apples","ColumnFamily2",ComparatorType.UTF8TYPE);
StringSerializer stringSerializer = StringSerializer.get();
Mutator<String> mutator = HFactory.createMutator(keyspace, stringSerializer);
mutator.insert("jsmith", "Standard1", HFactory.createStringColumn("first", "John"));
}
}
My ERROR is:
16:22:19,852 INFO CassandraHostRetryService:37 - Downed Host Retry service started with queue size -1 and retry delay 10s
16:22:20,136 INFO JmxMonitor:54 - Registering JMX me.prettyprint.cassandra.service_Test Cluster:ServiceType=hector,MonitorType=hector
Exception in thread "main" me.prettyprint.hector.api.exceptions.HInvalidRequestException: InvalidRequestException(why:Keyspace apples does not exist)
at me.prettyprint.cassandra.connection.HThriftClient.getCassandra(HThriftClient.java:70)
at me.prettyprint.cassandra.connection.HConnectionManager.operateWithFailover(HConnectionManager.java:226)
at me.prettyprint.cassandra.service.KeyspaceServiceImpl.operateWithFailover(KeyspaceServiceImpl.java:131)
at me.prettyprint.cassandra.service.KeyspaceServiceImpl.batchMutate(KeyspaceServiceImpl.java:102)
at me.prettyprint.cassandra.service.KeyspaceServiceImpl.batchMutate(KeyspaceServiceImpl.java:108)
at me.prettyprint.cassandra.model.MutatorImpl$3.doInKeyspace(MutatorImpl.java:222)
at me.prettyprint.cassandra.model.MutatorImpl$3.doInKeyspace(MutatorImpl.java:219)
at me.prettyprint.cassandra.model.KeyspaceOperationCallback.doInKeyspaceAndMeasure(KeyspaceOperationCallback.java:20)
at me.prettyprint.cassandra.model.ExecutingKeyspace.doExecute(ExecutingKeyspace.java:85)
at me.prettyprint.cassandra.model.MutatorImpl.execute(MutatorImpl.java:219)
at me.prettyprint.cassandra.model.MutatorImpl.insert(MutatorImpl.java:59)
at org.cassandra.examples.MySample.main(MySample.java:25)
Caused by: InvalidRequestException(why:Keyspace apples does not exist)
at org.apache.cassandra.thrift.Cassandra$set_keyspace_result.read(Cassandra.java:5302)
at org.apache.cassandra.thrift.Cassandra$Client.recv_set_keyspace(Cassandra.java:481)
at org.apache.cassandra.thrift.Cassandra$Client.set_keyspace(Cassandra.java:456)
at me.prettyprint.cassandra.connection.HThriftClient.getCassandra(HThriftClient.java:68)
... 11 more
Thank you in advance for your help.

The exception you are getting is,
why:Keyspace apples does not exist
In your code, this line does not actually create the keyspace,
Keyspace keyspace = HFactory.createKeyspace("apples", cluster);
As described here, this is the code you need to define your keyspace,
ColumnFamilyDefinition cfDef = HFactory.createColumnFamilyDefinition("MyKeyspace", "ColumnFamilyName", ComparatorType.BYTESTYPE);
KeyspaceDefinition newKeyspace = HFactory.createKeyspaceDefinition("MyKeyspace", ThriftKsDef.DEF_STRATEGY_CLASS, replicationFactor, Arrays.asList(cfDef));
// Add the schema to the cluster.
// "true" as the second param means that Hector will block until all nodes see the change.
cluster.addKeyspace(newKeyspace, true);

We also have a getting started guide up on the wiki as well which might be of some help.