Remote Logging using Log4j2 - sockets

So i have this task to log activities to a file, but it has to be done
remotely on the server side, Remote logging.
NOTE : Remote Logging has to be in latest version of Log4j2(2.10)
My task was simple
Send logging info to a port.
Log info from port to a file.
My Discoveries
Socket Appender exist which help send info to a port. This is it, you dont need to create a client side code or anything.
Socket appender configuration in log4j2.properties
appender.socket.type = Socket
appender.socket.name= Socket_Appender
appender.socket.host = "IP address"
appender.socket.port = 8101
appender.socket.layout.type = SerializedLayout
appender.socket.connectTimeoutMillis = 2000
appender.socket.reconnectionDelayMillis = 1000
appender.socket.protocol = TCP
Adapting from here. But this is also log4j 1.x adaptation.
I found out that before log4j 2.6 to listen to a port we used TcpSocketServer which started a server using LogEventBridgeThis helped reach that conclusion. This class was in core.net.server which is no longer available.Assuming it is not used anymore and the only similar/closest class, TcpSocketManager.Other links that helped. How to use SocketAppend?
Then i tried this
public static final Logger LOG=LogManager.getLogger(myapp.class.getName());
main(){
LOG.debug("DEBUG LEVEL");
}
and got the following error
main ERROR TcpSocketManager (TCP:IPAddress:8111) caught exception
and will continue: java.net.SocketTimeoutException: connect timed out
I know this work because i made it read to a socket but there was no one listening, but somehow i messed up big time and there was a code change.
I need help how to go ahead. Thank You in advance

The socket server to remotely receive log events has been moved to a separate repository: https://github.com/apache/logging-log4j-tools
This still needs to be released.

Related

WLST - Cannot connect() with HTTPS - T3S Protocol - Port 9002

We changed the configuration of our WebLogic servers to use HTTPS and T3S for connections and use the secure encrypted port 9002 instead of cleartext port 7001. However when using the Web Logic Scripting Tool (WLST)'s connect() function, errors are thrown. One such error is as follows:
WLSTException: Error occurred while performing connect : Cannot connect via t3s or https. If using demo certs, verify that the -Dweblogic.security.TrustKeyStore=DemoTrust system property is set. : t3s://DatServer:9002: Destination 10.10.100.3, 9002 unreachable; nested exception is:
javax.net.ssl.SSLHandshakeException: General SSLEngine problem; No available router to destination
Use dumpStack() to view the full stacktrace :
The syntax of the connect function is: connect('user', 'password', 't3s://host:9002')
This connect() function works fine before the switch from HTTP to HTTPS. Now we cannot connect to the remote admin server using the connect command. Does anyone have any idea how to fix this?
I read some interesting help options but none of them seemed to work. These help suggestions and tips are located here: https://community.oracle.com/thread/1036828
We were able to connect to the remote host and port via telnet. We saw that the port is open and listening for connections on the loop back address with netstat. We tried adding these options to the script invocation: java -cp /path/to/weblogic.jar weblogic.WLST -Dweblogic.security.TrustKeyStore=DemoTrust -Dssl.debug=true Dweblogic.security.SSL.ignoreHostnameVerification=true -Djava.security.egd=file:/dev/./urandom but this also did not work.
We enabled tunneling in the General tab of WebLogic but not in the HTTP tab. I am not the one in control of the server so I just have to suggest things and hope that the instructions are followed.
I get it running in 12.2. by adding to
../oracle_common/common/bin/setWlstEnv_internal.sh
at the end the following lines (youu need to customize line 5 und 6, the values in brackets):
JAVA_OPTIONS="-Dweblogic.ssl.JSSEEnabled=true ${JAVA_OPTIONS}"
JAVA_OPTIONS="-Dweblogic.security.SSL.enableJSSE="true" ${JAVA_OPTIONS}"
JAVA_OPTIONS="-Dweblogic.security.SSL.ignoreHostnameVerification=true ${JAVA_OPTIONS}"
JAVA_OPTIONS="-Dweblogic.security.TrustKeyStore=CustomTrust ${JAVA_OPTIONS}"
JAVA_OPTIONS="-Dweblogic.security.CustomTrustKeyStoreFileName= ${JAVA_OPTIONS}"
JAVA_OPTIONS="-Dweblogic.security.CustomTrustKeyStorePassPhrase= ${JAVA_OPTIONS}"
JAVA_OPTIONS="-Dweblogic.security.CustomTrustKeyStoreType=JKS ${JAVA_OPTIONS}"
export JAVA_OPTIONS
and modifying in
../oracle_common/common/bin/wlst_internal.sh
the line starting with
eval '"${JAVA_HOME}/bin/java"' ${JVM_ARGS} ...
by adding ${JAVA_OPTIONS}
so that it looks as follows:
eval '"${JAVA_HOME}/bin/java"' ${JVM_ARGS} ${JAVA_OPTIONS} weblogic.WLST '"$#"'
Hope this helps, allthough modifying scripts that are named "..internal.." doesn´t give me a good feeling
export this before running wlst.sh
export WLST_PROPERTIES=" -Dweblogic.security.TrustKeyStore=CustomTrust -Dweblogic.security.CustomTrustKeyStoreFileName=/u01/oracle/properties/truststore.jks -Dweblogic.security.CustomTrustKeyStoreType=jks -Dweblogic.security.CustomTrustKeyStorePassPhrase=qaz#1234 " ;

failed to find free socket port for process dispatcher when trying remote debug

Highlights:
windows 10 host machine
ubuntu vagrant box (virtualbox) as guest vm
using vagrant port forwarding as like this: config.vm.network "forwarded_port", guest: 1234, host: 12340
IDE: IntelliJ IDEA with Ruby plugin
The Issue:
I've tried to set up remote ruby debug following this guide and getting an error in IDE: "failed to find free socket port for process dispatcher". It looks this issue is not IntelliJ-specific, I was able to reproduce it with latest RubyMine as well.
From IDEA's log
2017-07-07 21:53:03,515 [8879188] INFO - tion.impl.ExecutionManagerImpl - Failed to find free socket port for process dispatcher
com.intellij.execution.ExecutionException: Failed to find free socket port for process dispatcher
at org.jetbrains.plugins.ruby.ruby.debugger.RubyProcessDispatcher.<init>(RubyProcessDispatcher.java:46)
at org.jetbrains.plugins.ruby.ruby.debugger.RubyRemoteDebugRunner.doExecute(RubyRemoteDebugRunner.java:62)
...
Caused by: java.net.BindException: Address already in use: JVM_Bind
at java.net.TwoStacksPlainSocketImpl.socketBind(Native Method)
at java.net.TwoStacksPlainSocketImpl.socketBind(TwoStacksPlainSocketImpl.java:137)
...
I can understand it says Address already in use: JVM_Bind, but how remote debug supposed to work at all then? (I mean Is there any way to access guest vm port not forwarding it before? Clearly no) Any help to solve this issue is much appreciated.
For me the issue was due to another debug session that was open in the background. To prevent that from happening again (and also close all other currently open sessions, once you run the configuration again) select "Single instance only" in the Debug Configuration:

"Connect time out" error for jClouds via proxy

I am trying to run a simple program of jcloud. The program is as follows:
String provider = "openstack-nova";
String identity = "Tenant:usename"; // tenantName:userName
String credential = "pass";
novaApi = ContextBuilder.newBuilder(provider).endpoint("http://openstack.infosys.tuwien.ac.at/identity/v2.0")
.credentials(identity, credential).modules(modules).buildApi(NovaApi.class);
regions = novaApi.getConfiguredRegions();
The openstack.infosys is connect via SOCKS proxy on port 7777. I have also enlisted the same on eclipse(Window->Preferences->General->Network Config->SOCKS(Manual)) . However, everytime I run the code I get the following error:
ERROR o.j.h.i.JavaUrlHttpCommandExecutorService - Command not considered safe to retry because request method is POST:
Which is then caused by
Caused by: java.net.SocketTimeoutException: connect timed out
I am able to access the horizon web interface of the same without any issues.
Can someone please help me in understanding what is the possible problem.
You need to tell Apache jclouds about your proxy configuration when creating the context. Have a look at these properties, and pass the ones you need to the overrides method of the ContextBuilder:
Proxy type
Proxy host
Proxy port
Proxy user
Proxy password

Handling connection failures in apache-camel

I am writing an apache-camel RabbitMQ consumer. I would like to react somehow to connection problems (i.e. try to reconnect). Is it possible to configure apache-camel to automatically reconnect?
If not, how can I find out that a connection to the queue was interrupted? I've done the following test:
start the queue (and some producer)
start my consumer (it was getting messages as expected)
stop the queue (the messages stopped arriving, as expected, but no exception was thrown)
start the queue (no new messages were received)
I am using camel in Scala (via akka-camel), but a Java solution would be probably also OK
You can pass in the flag automaticRecoveryEnabled=true to the URI, Camel will reconnect if the connection is lost.
For automatic RabbitMQ resource recovery (Connections/Channels/Consumers/Queues/Exchanages/Bindings) when failures occur, check out Lyra (which I authored). Example usage:
Config config = new Config()
.withRecoveryPolicy(new RecoveryPolicy()
.withMaxAttempts(20)
.withInterval(Duration.seconds(1))
.withMaxDuration(Duration.minutes(5)));
ConnectionOptions options = new ConnectionOptions().withHost("localhost");
Connection connection = Connections.create(options, config);
The rest of the API is just the amqp-client API, except your resources are automatically recovered when failures occur.
I'm not sure about camel-rabbitmq specifically, but hopefully there's a way you can swap in your own resource creation via Lyra.
Current camel-rabbitmq just create a connection and the channel when the consumer or producer is started. So it don't have a chance to catch the connection exception :(.

jetty error starting on Mac

Hello Ive downloaded jetty and whenever I try to start it it generate the following log and gives an error so I can't use it, can somebody tell me whats wrong or whats missing
Im starting on terminal in the bin folder with the "./jetty.sh start"
Here's the error on localhost:8080
Error 404 - Not Found.
No context on this server matched or handled this request.
Contexts known to this server are:
Powered by Jetty Java Web Server
Heres the log:
https://www.dropbox.com/s/u6j7t1lhqscv34l/log.rtf
Looks like that port 8080 is already in use: "java.net.BindException: Address already in use
"
Try an different port or don't declare a port and use logic like this to figure out what you are bound to:
Server server = new Server(0);
int port = ((ServerConnector) server.getConnectors()[0]).getLocalPort();