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Questions tagged [mdc]

MDC (*mapped diagnostic context*) is a way to attach thread-scoped named identifier that can be added to every log message from that thread.

It is used to provide log messages with information that is unavailable to the scope when log is written.It provides the thread and user context to log messages and hence stamp each log for better tracking.

For example, it can help put Correlation Id to a request’s logs to help filter it out from similar logs at that time (from other quests) and also track it easily when this request hop from service to service by sharing the Correlation Id.

Typical use cases

Useful links

288 questions
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perf4J with MDC

Does anyone know if perf4J has support for log4j MDC. All my log statements are appended with MDC values, however the perf4J log statements don't show the MDC value. Please see below, I expect MDCMappedValue to be shown at the end of [TimingLogger]…
Himalay Majumdar
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How to set Task Decorator in Task Executor through XML configuration?

I have an application that uses Spring Integration for Parallel calls. All configurations are in the config.xml. Is there a way to set the decorator of every task executor I placed but still using the XML configuration? I have to pass the MDC from…
Mawie
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MDC logging in Core Java

While using MDC with log4j in a simple java(JDK-9) code, I am not getting any value for the MDC defined field. Below are My java code and log4j.properties file. Java code: import org.apache.log4j.Logger; import org.apache.log4j.MDC; public class…
Sarthak Sahu
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Can I put aspect oriented pointcut on every CompletableFuture async calls?

In my spring-boot java project, I have hundreds of API which call other backend API on different cases. These calls happen in parallel threads (inside CompletableFuture async methods). For logging purpose, I need to log each calls with an unique ID…
Stone Henge
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Spring Batch MDC Logging

I'm wanting to know how to log things such as the Job Name and Execution ID using MCD in Spring Batch. Here's some code: bootstrap.properties this file has a list of items I currently log, and I've added execId as the 3rd element…
Josh
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Is it possible to format the MDC/Context Map as JSON using a PatternLayout in Log4j2?

I'm using log4j2 with a PatternLayout, and this pattern: %d %-5p %t %c{1.} - %m %X%n%ex. That %X appends the Context Map (aka Media Diagnostic Context) to the end of the log line, before any exceptions. In my log aggregator, I'm trying to parse…
Andrew Rueckert
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Not able to update value in mdc-dialog using ngModel

I tried to update the input field using ngModel: But the value is not updated inside a . I have imported FormsModule in app.module.ts file. But then also I am having issue. NB: I…
TTT
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JAX-RS DynamicFeature implementation not called from VertxResteasyDeployment

I'm trying to Log unique request id for each http request using MDC to my resource for debugging and trace a particular request. For same I've created one custom annotation @TagRequestID. Below is the for logging request id. But what I'm not able to…
Abhishek
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Logback MDC - Wrong Value in SuccessHandler

I'm trying to log certain events through logback in my Spring4 application. Taken from the logback documentation I have the following UserId Filter @Component public class UserIdFilter implements Filter { public static final String USERID =…
empinator
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Spring Kafka and MDC

I have a Kafka consumer implemented as : @KafkaListener(topics="...", group-id="....") public void doProcessing(@Payload String data, @Headers Map headers) { //read one of the headers and get a unique id pertaining for thread //set…
user1808266
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MDC not logging user name to logs

In my spring-boot project, I am trying to implement MDC for logback. In one of my two spring-security filters, I am putting a key-value inside MDC. But in the logs the value inside MDC is not printed. public class JWTAuthorizationFilter extends…
Naanavanalla
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Logback sfl4j MDC unique for http request

I'm working with Sping Boot 1.5.7. The application offers API Restful. I have a Filter where I set the MDC with username and transaction id. MDC.put("user", authentication.getPrincipal().toString()); …
Michel Foucault
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User Account locking\unlocking audit logs not coming in WSO2 5.3.0 audit.log

Account locking\unlocking audit logs not coming in WSO2 5.3.0 audit.log. I tried below scenarios and didn't see any corresponding log in audit.log file: 1.Make 3 incorrect login attempts 2. Wait for 5 minutes ( keep user account idle ) 3. Lock the…
Ravi Kumar
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MDC value returns empty

I am working on a dropwizard project. In the config.yml file i am specifying the log format for the console appender using MDC variables. E.g appenders: - type: console logFormat: "date=%d{yyyy-MM-dd HH:mm:ss}…
DTNPerera
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When to use DiagnosticActorLogging instead of ActorLogging traits in Akka?

What is the difference between ActorLogging and DiagnosticActorLogging traits in Akka and when should you favor one over the other? A quick look at the docs doesn't provide much guidance.
davidrpugh
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