gustavoschewinski commented on issue #1732:
URL: https://github.com/apache/plc4x/issues/1732#issuecomment-2301338673
Hi @splatch,
Thanks a lot for your help—I really appreciate it.
I suspected the issue might be the same, so I'm using the 0.13-SNAPSHOT
version for everything, but still didn't make any difference.
```xml
<dependency>
<groupId>org.apache.plc4x</groupId>
<artifactId>plc4j-api</artifactId>
<version>0.13.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>org.apache.plc4x</groupId>
<artifactId>plc4j-driver-opcua</artifactId>
<version>0.13.0-SNAPSHOT</version>
</dependency>
```
I have a few other ideas that might be causing the problem, so I’ll share
all the information I’ve gathered:
1. The issue always occurs when the channel lifetime is about to expire, and
the secure channel should be renewed. For example, when I set the channel
lifetime to 1 minute, the problem occurs within that 1-minute period. This is
one reason I believe it’s not related to resource leaks, as mentioned in [this
issue](https://github.com/apache/plc4x/issues/1364).
As mentioned earlier, I tried adding `tcp.keep-alive` in hopes of
facilitating the reconnection, but it’s still not working. Unfortunately, I’m
still unable to pinpoint where the error is coming from.
3. When I check the Prosys OPCUA simulator logs, I can see that it doesn’t
attempt to renew the connection; instead, it just closes the channel. Do I need
to enable something in the simulator? I’m attaching the logs for your reference.
```
08/21/2024 09:27:55.596 INFO [OPC-UA-Stack-Non-Blocking-Work-Executor-2]
com.prosysopc.ua.stack.transport.tcp.nio.f [] -
OpcTcpServer(opc.tcp(/[0:0:0:0:0:0:0:0]:53530,
(opc.tcp://Yoshi.lab.mtu-digilab.io:53530
[[http://opcfoundation.org/UA/SecurityPolicy#None,None]])(opc.tcp://Yoshi.lab.mtu-digilab.io:53530/OPCUA/SimulationServer
[[http://opcfoundation.org/UA/SecurityPolicy#Basic256Sha256,SignAndEncrypt]]))):
/10.1.10.92:47938 connected
08/21/2024 09:27:56.502 INFO [OPC-UA-Stack-Non-Blocking-Work-Executor-4]
com.prosysopc.ua.stack.transport.tcp.nio.f [] -
OpcTcpServer(opc.tcp(/[0:0:0:0:0:0:0:0]:53530,
(opc.tcp://Yoshi.lab.mtu-digilab.io:53530
[[http://opcfoundation.org/UA/SecurityPolicy#None,None]])(opc.tcp://Yoshi.lab.mtu-digilab.io:53530/OPCUA/SimulationServer
[[http://opcfoundation.org/UA/SecurityPolicy#Basic256Sha256,SignAndEncrypt]]))):
/10.1.10.92:47950 connected
08/21/2024 09:27:57.376 INFO [OPC-UA-Stack-Non-Blocking-Work-Executor-8]
com.prosysopc.ua.stack.cert.d [] - CRL initialized from
C:\Users\gustavo.schewinski\.prosysopc\prosys-opc-ua-simulation-server\PKI\CA\issuers\crl\ca.crl:
no revoked certificates
08/21/2024 09:27:57.432 INFO [OPC-UA-Stack-Non-Blocking-Work-Executor-8]
com.prosysopc.ua.stack.cert.d [] - CRL initialized from
C:\Users\gustavo.schewinski\.prosysopc\prosys-opc-ua-simulation-server\PKI\CA\issuers\crl\ca.crl:
no revoked certificates
08/21/2024 09:27:57.444 INFO [OPC-UA-Stack-Non-Blocking-Work-Executor-8]
com.prosysopc.ua.stack.cert.d [] - CRL initialized from
C:\Users\gustavo.schewinski\.prosysopc\prosys-opc-ua-simulation-server\PKI\CA\issuers\crl\ca.crl:
no revoked certificates
08/21/2024 09:27:57.451 INFO [OPC-UA-Stack-Non-Blocking-Work-Executor-8]
com.prosysopc.ua.stack.cert.d [] - CRL initialized from
C:\Users\gustavo.schewinski\.prosysopc\prosys-opc-ua-simulation-server\PKI\CA\issuers\crl\ca.crl:
no revoked certificates
08/21/2024 09:27:57.460 INFO [OPC-UA-Stack-Non-Blocking-Work-Executor-8]
com.prosysopc.ua.stack.cert.d [] - Certificate
'332E73BEB6F91AD8A6779EDB866FDFE332F3DE09' added to trusted certificates.
08/21/2024 09:27:57.486 INFO [OPC-UA-Stack-Blocking-Work-Executor-1]
com.prosysopc.ua.stack.transport.tcp.nio.h [] - SecureChannel opened;
SecurityToken(Id=1, secureChannelId=1, creationTime=21.08.2024, 09:27:57,
lifetime=50000)
08/21/2024 09:27:57.759 INFO [OPC-UA-Stack-Blocking-Work-Executor-2]
com.prosysopc.ua.stack.cert.d [] - CRL initialized from
C:\Users\gustavo.schewinski\.prosysopc\prosys-opc-ua-simulation-server\PKI\CA\issuers\crl\ca.crl:
no revoked certificates
08/21/2024 09:27:57.765 INFO [OPC-UA-Stack-Blocking-Work-Executor-2]
com.prosysopc.ua.stack.cert.d [] - CRL initialized from
C:\Users\gustavo.schewinski\.prosysopc\prosys-opc-ua-simulation-server\PKI\CA\issuers\crl\ca.crl:
no revoked certificates
08/21/2024 09:27:57.769 INFO [OPC-UA-Stack-Blocking-Work-Executor-2]
com.prosysopc.ua.stack.cert.d [] - CRL initialized from
C:\Users\gustavo.schewinski\.prosysopc\prosys-opc-ua-simulation-server\PKI\CA\issuers\crl\ca.crl:
no revoked certificates
08/21/2024 09:27:57.775 INFO [OPC-UA-Stack-Blocking-Work-Executor-2]
com.prosysopc.ua.stack.cert.d [] - CRL initialized from
C:\Users\gustavo.schewinski\.prosysopc\prosys-opc-ua-simulation-server\PKI\CA\issuers\crl\ca.crl:
no revoked certificates
08/21/2024 09:27:57.777 INFO [OPC-UA-Stack-Blocking-Work-Executor-2]
com.prosysopc.ua.stack.cert.d [] - Certificate
'332E73BEB6F91AD8A6779EDB866FDFE332F3DE09' added to trusted certificates.
08/21/2024 09:27:57.800 INFO [OPC-UA-Stack-Blocking-Work-Executor-2]
com.prosysopc.ua.server.ab [] - Session created: UaSession:OPCUA
client for the Apache PLC4X:PLC4J project:dzQ381Tfp8FvZtKLUZ11
(ID=ns=1;g=e6b02fa6-6e6a-4aa6-b3e8-4e986030ae9e
Token=b=F/3BaxFLVRA/5jaBUaZB+7ooRmFWFn3BOACcoOJVC4Q= Channel=(SecureChannelId=1
State=Open URL=opc.tcp://Yoshi.lab.mtu-digilab.io:53530/OPCUA/SimulationServer
SecurityPolicy=http://opcfoundation.org/UA/SecurityPolicy#Basic256Sha256
RemoteAddress=/10.1.10.92:47950))
08/21/2024 09:27:58.107 INFO [OPC-UA-Stack-Blocking-Work-Executor-4]
com.prosysopc.ua.server.ab [] - Session activated:
UaSession:OPCUA client for the Apache PLC4X:PLC4J project:dzQ381Tfp8FvZtKLUZ11
(ID=ns=1;g=e6b02fa6-6e6a-4aa6-b3e8-4e986030ae9e
Token=b=F/3BaxFLVRA/5jaBUaZB+7ooRmFWFn3BOACcoOJVC4Q= Channel=(SecureChannelId=1
State=Open URL=opc.tcp://Yoshi.lab.mtu-digilab.io:53530/OPCUA/SimulationServer
SecurityPolicy=http://opcfoundation.org/UA/SecurityPolicy#Basic256Sha256
RemoteAddress=/10.1.10.92:47950))
08/21/2024 09:28:35.814 INFO [OPC-UA-Stack-Non-Blocking-Work-Executor-8]
com.prosysopc.ua.stack.cert.d [] - CRL initialized from
C:\Users\gustavo.schewinski\.prosysopc\prosys-opc-ua-simulation-server\PKI\CA\issuers\crl\ca.crl:
no revoked certificates
08/21/2024 09:28:35.820 INFO [OPC-UA-Stack-Non-Blocking-Work-Executor-8]
com.prosysopc.ua.stack.cert.d [] - CRL initialized from
C:\Users\gustavo.schewinski\.prosysopc\prosys-opc-ua-simulation-server\PKI\CA\issuers\crl\ca.crl:
no revoked certificates
08/21/2024 09:28:35.826 INFO [OPC-UA-Stack-Non-Blocking-Work-Executor-8]
com.prosysopc.ua.stack.cert.d [] - CRL initialized from
C:\Users\gustavo.schewinski\.prosysopc\prosys-opc-ua-simulation-server\PKI\CA\issuers\crl\ca.crl:
no revoked certificates
08/21/2024 09:28:35.831 INFO [OPC-UA-Stack-Non-Blocking-Work-Executor-8]
com.prosysopc.ua.stack.cert.d [] - CRL initialized from
C:\Users\gustavo.schewinski\.prosysopc\prosys-opc-ua-simulation-server\PKI\CA\issuers\crl\ca.crl:
no revoked certificates
08/21/2024 09:28:35.832 INFO [OPC-UA-Stack-Non-Blocking-Work-Executor-8]
com.prosysopc.ua.stack.cert.d [] - Certificate
'332E73BEB6F91AD8A6779EDB866FDFE332F3DE09' added to trusted certificates.
08/21/2024 09:28:35.837 INFO [OPC-UA-Stack-Blocking-Work-Executor-14]
com.prosysopc.ua.stack.transport.tcp.nio.h [] - Secure Channel closed,
token=SecurityToken(Id=1, secureChannelId=1, creationTime=21.08.2024, 09:27:57,
lifetime=50000)
08/21/2024 09:28:35.838 INFO [OPC-UA-Stack-Blocking-Work-Executor-14]
com.prosysopc.ua.stack.transport.a.a [] - Channel closed: Id=1
```
4. Below is the full code I’m using to establish the connection and retrieve
data. Perhaps I’m missing some important configuration:
```java
import org.apache.plc4x.java.DefaultPlcDriverManager;
import org.apache.plc4x.java.api.PlcConnection;
import org.apache.plc4x.java.api.messages.PlcReadRequest;
import org.apache.plc4x.java.api.messages.PlcReadResponse;
import java.util.concurrent.TimeUnit;
public class App {
public static void main(String[] args) {
DefaultPlcDriverManager driverManager = new
DefaultPlcDriverManager();
String username = "admin";
String password = "admin";
String securityPolicy = "Basic256Sha256";
String keyStoreFile =
"/home/digilab/help/test2/demo_2/test/client/client_cert.p12";
String serverCertificate =
"/home/digilab/help/test2/demo_2/test/SimulationServer@Yoshi_2048.der";
String keyStorePassword = "gustavo";
String messageSecurity = "SIGN_ENCRYPT";
String connectionString = String.format(
"opcua:tcp://Yoshi.lab.mtu-digilab.io:53530/OPCUA/SimulationServer?discovery=false"
);
connectionString += !username.isBlank() ?
String.format("&username=%s", username) : "";
connectionString += !password.isBlank() ?
String.format("&password=%s", password) : "";
connectionString += !securityPolicy.isBlank() ?
String.format("&security-policy=%s", securityPolicy) : "";
connectionString += !messageSecurity.isBlank() ?
String.format("&message-security=%s", messageSecurity) : "";
connectionString += !serverCertificate.isBlank() ?
String.format("&server-certificate-file=%s", serverCertificate) : "";
connectionString += !keyStoreFile.isBlank() ?
String.format("&key-store-file=%s", keyStoreFile) : "";
connectionString += !keyStorePassword.isBlank() ?
String.format("&key-store-password=%s", keyStorePassword) : "";
connectionString += String.format("&tcp.keep-alive=%b", true);
connectionString += String.format("&channel-lifetime=%d", 50000);
System.out.println("Connection String: " + connectionString);
try (PlcConnection plcConnection =
driverManager.getConnection(connectionString)) {
System.out.println("Connected to the server");
System.out.println("Connection metadata: " +
plcConnection.getMetadata());
while (true) {
PlcReadRequest.Builder builder =
plcConnection.readRequestBuilder();
System.out.println("Builder: " + builder);
System.out.println("Builder: " + builder.getClass());
System.out.println("Builder: " + plcConnection);
builder.addTagAddress("constant", "ns=3;i=1002");
PlcReadRequest readRequest = builder.build();
PlcReadResponse response = readRequest.execute().get(5000,
TimeUnit.MILLISECONDS);
for (String tagName : response.getTagNames()) {
System.out.println("Value[" + tagName + "]: " +
response.getObject(tagName));
}
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
} catch (Exception e) {
System.out.println("" + e);
}
}
}
```
5. The PLC4x Java logs don’t indicate any issues. Since the logs are quite
extensive, I’m attaching them in case you might know where to look.
[java_log.txt](https://github.com/user-attachments/files/16687636/java_log.txt)
That's all. Thank again for your support! I hope we can find a solution
together
Best,
Gustavo.
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